# HG changeset patch
# User Matthew Wild <mwild1@gmail.com>
# Date 1323234295 0
# Node ID 1c8d2c0d02db017cfbbe22506b1318ea3d5d9a2d
# Parent  7f51186ed28b2f5c4373c3765a1c3aea6bb5e091
util.array: Add pluck() method to pick a given property from each item

diff -r 7f51186ed28b -r 1c8d2c0d02db util/array.lua
--- a/util/array.lua	Wed Dec 07 04:57:51 2011 +0000
+++ b/util/array.lua	Wed Dec 07 05:04:55 2011 +0000
@@ -60,6 +60,13 @@
 	return outa;
 end
 
+function array_base.pluck(outa, ina, key)
+	for i=1,#ina do
+		outa[i] = ina[i][key];
+	end
+	return outa;
+end
+
 --- These methods only mutate
 function array_methods:random()
 	return self[math.random(1,#self)];