From d0157d93d24c8c7f1a86289efe29e203d98bb072 Mon Sep 17 00:00:00 2001
From: Stephen Blott
Date: Mon, 5 Nov 2012 09:01:39 +0000
Subject: Factor pushMatchingRanges, improve comments/tests 1. Factor out
 `pushMatchingRanges`:    This then allows us to ... 2. Add unit tests for
 `pushMatchingRanges`    In effect, these tests verify where matches are
 highlighted in suggestions. 3. Added Utils.zip.  This helps simplify
 `pushMatchingRanges` unit tests. 4. Improve comments.

---
 lib/utils.coffee | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'lib')

diff --git a/lib/utils.coffee b/lib/utils.coffee
index e89d0aa2..c997b74b 100644
--- a/lib/utils.coffee
+++ b/lib/utils.coffee
@@ -126,6 +126,14 @@ Utils =
         return 1
     0
 
+  # Zip two (or more) arrays:
+  #   - Utils.zip([ [a,b], [1,2] ]) returns [ [a,1], [b,2] ]
+  #   - Length of result is `arrays[0].length`.
+  #   - Adapted from: http://stackoverflow.com/questions/4856717/javascript-equivalent-of-pythons-zip-function
+  zip: (arrays) ->
+    arrays[0].map (_,i) ->
+      arrays.map( (array) -> array[i] )
+    
 # This creates a new function out of an existing function, where the new function takes fewer arguments. This
 # allows us to pass around functions instead of functions + a partial list of arguments.
 Function::curry = ->
-- 
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