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util/array.lua @ 11568:d5360307a99d

mod_http_file_share: Handle out of bounds Range request Turns out you can seek past the end of the file without getting an error. Also rejects empty range instead of sending the whole file.

author	Kim Alvefur <zash@zash.se>
date	Mon, 17 May 2021 14:14:25 +0200
parent	10895:5777968301e8
child	11787:3ae6fa901a8b

rev	line source
1522 569d58d21612 Add copyright header to those files missing one Matthew Wild <mwild1@gmail.com> parents: 1373 diff changeset	1 -- Prosody IM
2923 b7049746bd29 Update copyright headers for 2010 Matthew Wild <mwild1@gmail.com> parents: 1934 diff changeset	2 -- Copyright (C) 2008-2010 Matthew Wild
b7049746bd29 Update copyright headers for 2010 Matthew Wild <mwild1@gmail.com> parents: 1934 diff changeset	3 -- Copyright (C) 2008-2010 Waqas Hussain
5776 bd0ff8ae98a8 Remove all trailing whitespace Florian Zeitz <florob@babelmonkeys.de> parents: 5564 diff changeset	4 --
1522 569d58d21612 Add copyright header to those files missing one Matthew Wild <mwild1@gmail.com> parents: 1373 diff changeset	5 -- This project is MIT/X11 licensed. Please see the
569d58d21612 Add copyright header to those files missing one Matthew Wild <mwild1@gmail.com> parents: 1373 diff changeset	6 -- COPYING file in the source package for more information.
569d58d21612 Add copyright header to those files missing one Matthew Wild <mwild1@gmail.com> parents: 1373 diff changeset	7 --
569d58d21612 Add copyright header to those files missing one Matthew Wild <mwild1@gmail.com> parents: 1373 diff changeset	8
3540 bc139431830b Monster whitespace commit (beware the whitespace monster). Waqas Hussain <waqas20@gmail.com> parents: 2923 diff changeset	9 local t_insert, t_sort, t_remove, t_concat
bc139431830b Monster whitespace commit (beware the whitespace monster). Waqas Hussain <waqas20@gmail.com> parents: 2923 diff changeset	10 = table.insert, table.sort, table.remove, table.concat;
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	11
4449 ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	12 local setmetatable = setmetatable;
10592 9918b4b0cd58 util.array: Fix equality metamethod in Lua 5.3 Kim Alvefur <zash@zash.se> parents: 9529 diff changeset	13 local getmetatable = getmetatable;
4449 ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	14 local math_random = math.random;
5857 8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	15 local math_floor = math.floor;
4449 ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	16 local pairs, ipairs = pairs, ipairs;
ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	17 local tostring = tostring;
6417 060b63a27e9b util.array: Add type() local Kim Alvefur <zash@zash.se> parents: 5857 diff changeset	18 local type = type;
4449 ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	19
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	20 local array = {};
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	21 local array_base = {};
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	22 local array_methods = {};
9528 1af7cc3b9747 util.array: Break long line Matthew Wild <mwild1@gmail.com> parents: 9487 diff changeset	23 local array_mt = {
1af7cc3b9747 util.array: Break long line Matthew Wild <mwild1@gmail.com> parents: 9487 diff changeset	24 __index = array_methods;
1af7cc3b9747 util.array: Break long line Matthew Wild <mwild1@gmail.com> parents: 9487 diff changeset	25 __name = "array";
1af7cc3b9747 util.array: Break long line Matthew Wild <mwild1@gmail.com> parents: 9487 diff changeset	26 __tostring = function (self) return "{"..self:concat(", ").."}"; end;
1af7cc3b9747 util.array: Break long line Matthew Wild <mwild1@gmail.com> parents: 9487 diff changeset	27 };
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	28
9487 4e38121a349d util.array: Add freeze metamethod Kim Alvefur <zash@zash.se> parents: 8521 diff changeset	29 function array_mt:__freeze() return self; end
4e38121a349d util.array: Add freeze metamethod Kim Alvefur <zash@zash.se> parents: 8521 diff changeset	30
5085 cbc7eb5cfa8c util.array: Accept an iterator to the array constructor Matthew Wild <mwild1@gmail.com> parents: 4449 diff changeset	31 local function new_array(self, t, _s, _var)
cbc7eb5cfa8c util.array: Accept an iterator to the array constructor Matthew Wild <mwild1@gmail.com> parents: 4449 diff changeset	32 if type(t) == "function" then -- Assume iterator
cbc7eb5cfa8c util.array: Accept an iterator to the array constructor Matthew Wild <mwild1@gmail.com> parents: 4449 diff changeset	33 t = self.collect(t, _s, _var);
cbc7eb5cfa8c util.array: Accept an iterator to the array constructor Matthew Wild <mwild1@gmail.com> parents: 4449 diff changeset	34 end
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	35 return setmetatable(t or {}, array_mt);
967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	36 end
967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	37
1373 120275376bbb util.array: Add support for + operator to create a new array from two arrays joined Matthew Wild <mwild1@gmail.com> parents: 1372 diff changeset	38 function array_mt.__add(a1, a2)
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined Matthew Wild <mwild1@gmail.com> parents: 1372 diff changeset	39 local res = new_array();
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined Matthew Wild <mwild1@gmail.com> parents: 1372 diff changeset	40 return res:append(a1):append(a2);
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined Matthew Wild <mwild1@gmail.com> parents: 1372 diff changeset	41 end
120275376bbb util.array: Add support for + operator to create a new array from two arrays joined Matthew Wild <mwild1@gmail.com> parents: 1372 diff changeset	42
7976 2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	43 function array_mt.__eq(a, b)
10592 9918b4b0cd58 util.array: Fix equality metamethod in Lua 5.3 Kim Alvefur <zash@zash.se> parents: 9529 diff changeset	44 if getmetatable(a) ~= array_mt or getmetatable(b) ~= array_mt then
9918b4b0cd58 util.array: Fix equality metamethod in Lua 5.3 Kim Alvefur <zash@zash.se> parents: 9529 diff changeset	45 -- Lua 5.3+ calls this if both operands are tables, even if metatables differ
9918b4b0cd58 util.array: Fix equality metamethod in Lua 5.3 Kim Alvefur <zash@zash.se> parents: 9529 diff changeset	46 return false;
9918b4b0cd58 util.array: Fix equality metamethod in Lua 5.3 Kim Alvefur <zash@zash.se> parents: 9529 diff changeset	47 end
7976 2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	48 if #a == #b then
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	49 for i = 1, #a do
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	50 if a[i] ~= b[i] then
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	51 return false;
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	52 end
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	53 end
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	54 else
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	55 return false;
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	56 end
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	57 return true;
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	58 end
2a7ef5fcaa77 util.array: Add O(n) equality check metamethod Kim Alvefur <zash@zash.se> parents: 7700 diff changeset	59
9529 6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	60 function array_mt.__div(a1, func)
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	61 local a2 = new_array();
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	62 local o = 0;
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	63 for i = 1, #a1 do
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	64 local new_value = func(a1[i]);
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	65 if new_value ~= nil then
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	66 o = o + 1;
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	67 a2[o] = new_value;
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	68 end
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	69 end
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	70 return a2;
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	71 end
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	72
920 e302cbc9d036 util.array: Expose array.* functions, to be used for unwrapped arrays Matthew Wild <mwild1@gmail.com> parents: 918 diff changeset	73 setmetatable(array, { __call = new_array });
e302cbc9d036 util.array: Expose array.* functions, to be used for unwrapped arrays Matthew Wild <mwild1@gmail.com> parents: 918 diff changeset	74
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	75 -- Read-only methods
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	76 function array_methods:random()
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	77 return self[math_random(1, #self)];
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	78 end
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	79
9529 6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	80 -- Return a random value excluding the one at idx
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	81 function array_methods:random_other(idx)
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	82 local max = #self;
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	83 return self[((math.random(1, max-1)+(idx-1))%max)+1];
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	84 end
6a1e7723208b util.array: Add __div for parity with util.set Matthew Wild <mwild1@gmail.com> parents: 9528 diff changeset	85
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	86 -- These methods can be called two ways:
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	87 -- array.method(existing_array, [params [, ...]]) -- Create new array for result
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	88 -- existing_array:method([params, ...]) -- Transform existing array into result
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	89 --
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	90 function array_base.map(outa, ina, func)
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	91 for k, v in ipairs(ina) do
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	92 outa[k] = func(v);
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	93 end
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	94 return outa;
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	95 end
967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	96
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	97 function array_base.filter(outa, ina, func)
1915 e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	98 local inplace, start_length = ina == outa, #ina;
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	99 local write = 1;
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	100 for read = 1, start_length do
1915 e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	101 local v = ina[read];
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	102 if func(v) then
1915 e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	103 outa[write] = v;
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	104 write = write + 1;
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	105 end
967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	106 end
5776 bd0ff8ae98a8 Remove all trailing whitespace Florian Zeitz <florob@babelmonkeys.de> parents: 5564 diff changeset	107
1922 d5fe0f9b377a util.array: Small logic fix for array:filter() Matthew Wild <mwild1@gmail.com> parents: 1915 diff changeset	108 if inplace and write <= start_length then
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	109 for i = write, start_length do
1915 e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	110 outa[i] = nil;
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	111 end
e9d5406caf8c util.array: Fix for array:filter() (in-place filtering) Matthew Wild <mwild1@gmail.com> parents: 1905 diff changeset	112 end
5776 bd0ff8ae98a8 Remove all trailing whitespace Florian Zeitz <florob@babelmonkeys.de> parents: 5564 diff changeset	113
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	114 return outa;
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	115 end
967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	116
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	117 function array_base.sort(outa, ina, ...)
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	118 if ina ~= outa then
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	119 outa:append(ina);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	120 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	121 t_sort(outa, ...);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	122 return outa;
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	123 end
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	124
8017 ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	125 function array_base.unique(outa, ina)
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	126 local seen = {};
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	127 return array_base.filter(outa, ina, function (item)
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	128 if seen[item] then
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	129 return false;
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	130 else
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	131 seen[item] = true;
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	132 return true;
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	133 end
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	134 end);
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	135 end
ec7cab8e744d util.array: Add method for filtering out duplicate values Kim Alvefur <zash@zash.se> parents: 7976 diff changeset	136
10895 5777968301e8 util.array: pluck: Support default value to avoid holes Matthew Wild <mwild1@gmail.com> parents: 10592 diff changeset	137 function array_base.pluck(outa, ina, key, default)
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	138 for i = 1, #ina do
10895 5777968301e8 util.array: pluck: Support default value to avoid holes Matthew Wild <mwild1@gmail.com> parents: 10592 diff changeset	139 local v = ina[i][key];
5777968301e8 util.array: pluck: Support default value to avoid holes Matthew Wild <mwild1@gmail.com> parents: 10592 diff changeset	140 if v == nil then
5777968301e8 util.array: pluck: Support default value to avoid holes Matthew Wild <mwild1@gmail.com> parents: 10592 diff changeset	141 v = default;
5777968301e8 util.array: pluck: Support default value to avoid holes Matthew Wild <mwild1@gmail.com> parents: 10592 diff changeset	142 end
5777968301e8 util.array: pluck: Support default value to avoid holes Matthew Wild <mwild1@gmail.com> parents: 10592 diff changeset	143 outa[i] = v;
4439 1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item Matthew Wild <mwild1@gmail.com> parents: 4387 diff changeset	144 end
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item Matthew Wild <mwild1@gmail.com> parents: 4387 diff changeset	145 return outa;
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item Matthew Wild <mwild1@gmail.com> parents: 4387 diff changeset	146 end
1c8d2c0d02db util.array: Add pluck() method to pick a given property from each item Matthew Wild <mwild1@gmail.com> parents: 4387 diff changeset	147
5857 8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	148 function array_base.reverse(outa, ina)
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	149 local len = #ina;
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	150 if ina == outa then
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	151 local middle = math_floor(len/2);
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	152 len = len + 1;
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	153 local o; -- opposite
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	154 for i = 1, middle do
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	155 o = len - i;
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	156 outa[i], outa[o] = outa[o], outa[i];
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	157 end
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	158 else
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	159 local off = len + 1;
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	160 for i = 1, len do
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	161 outa[i] = ina[off - i];
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	162 end
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	163 end
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	164 return outa;
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	165 end
8613888d0f9e util.array: Improve array:reverse() and make it work as both method and non-mutating function Kim Alvefur <zash@zash.se> parents: 5776 diff changeset	166
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	167 --- These methods only mutate the array
7700 0d70410efdcf util.array: Remove unused arguments [luacheck] Kim Alvefur <zash@zash.se> parents: 7699 diff changeset	168 function array_methods:shuffle()
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	169 local len = #self;
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	170 for i = 1, #self do
abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	171 local r = math_random(i, len);
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	172 self[i], self[r] = self[r], self[i];
967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	173 end
1372 3b13bb57002e util.array: Make array:reverse() and array:shuffle() return the array to allow chaining Matthew Wild <mwild1@gmail.com> parents: 1371 diff changeset	174 return self;
918 967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	175 end
967edf874df7 util.array: New array library Matthew Wild <mwild1@gmail.com> parents: diff changeset	176
7699 9c40d0be2295 util.array: Rename arguments to avoid name clash [luacheck] Kim Alvefur <zash@zash.se> parents: 7020 diff changeset	177 function array_methods:append(ina)
9c40d0be2295 util.array: Rename arguments to avoid name clash [luacheck] Kim Alvefur <zash@zash.se> parents: 7020 diff changeset	178 local len, len2 = #self, #ina;
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	179 for i = 1, len2 do
7699 9c40d0be2295 util.array: Rename arguments to avoid name clash [luacheck] Kim Alvefur <zash@zash.se> parents: 7020 diff changeset	180 self[len+i] = ina[i];
1371 9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one Matthew Wild <mwild1@gmail.com> parents: 1027 diff changeset	181 end
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one Matthew Wild <mwild1@gmail.com> parents: 1027 diff changeset	182 return self;
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one Matthew Wild <mwild1@gmail.com> parents: 1027 diff changeset	183 end
9e45bdf55353 util.array: Add array:append() method, to append a new array to an existing one Matthew Wild <mwild1@gmail.com> parents: 1027 diff changeset	184
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	185 function array_methods:push(x)
4449 ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	186 t_insert(self, x);
4448 d745f4c28294 util.array: Make array:push() chainable. Waqas Hussain <waqas20@gmail.com> parents: 4440 diff changeset	187 return self;
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	188 end
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	189
7020 6ab9c691c4c6 util.array: Just use table.remove as array:pop() Kim Alvefur <zash@zash.se> parents: 7019 diff changeset	190 array_methods.pop = t_remove;
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	191
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	192 function array_methods:concat(sep)
4449 ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	193 return t_concat(array.map(self, tostring), sep);
4440 c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	194 end
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	195
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	196 function array_methods:length()
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	197 return #self;
c60ed6732b34 util.array: Expand some of the more basic methods to act more sensibly than their names suggested Matthew Wild <mwild1@gmail.com> parents: 4439 diff changeset	198 end
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	199
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	200 --- These methods always create a new array
1027 fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	201 function array.collect(f, s, var)
4387 06161b0b83f2 util.array: Fix array.collect() for iterators that expect initial value of var to be preserved Matthew Wild <mwild1@gmail.com> parents: 3540 diff changeset	202 local t = {};
1027 fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	203 while true do
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	204 var = f(s, var);
7019 abcd5ec3ee41 util.array: Fix minory style issues Kim Alvefur <zash@zash.se> parents: 6777 diff changeset	205 if var == nil then break; end
4449 ca74d8ed1a15 util.array: Avoid globals. Waqas Hussain <waqas20@gmail.com> parents: 4448 diff changeset	206 t_insert(t, var);
1027 fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	207 end
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	208 return setmetatable(t, array_mt);
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	209 end
fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	210
1905 e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	211 ---
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	212
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	213 -- Setup methods from array_base
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	214 for method, f in pairs(array_base) do
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	215 local base_method = f;
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	216 -- Setup global array method which makes new array
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	217 array[method] = function (old_a, ...)
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	218 local a = new_array();
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	219 return base_method(a, old_a, ...);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	220 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	221 -- Setup per-array (mutating) method
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	222 array_methods[method] = function (self, ...)
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	223 return base_method(self, self, ...);
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	224 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	225 end
e3e0a17e0b33 util.array: Per-array methods now always mutate the array, array.* return a mutated copy, and most methods (e.g. sort) now return the array Matthew Wild <mwild1@gmail.com> parents: 1522 diff changeset	226
1027 fe2e3d3dba6a util.array: Add array.collect() to collect results from iterators into an array, and use module() to correctly set the module name Matthew Wild <mwild1@gmail.com> parents: 922 diff changeset	227 return array;

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util/array.lua

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