immutable-js
diff --git a/‎.gitignore
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diff --git a/‎.travis.yml
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diff --git a/‎dist/immutable.js
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+1-2Lines changed: 1 addition & 2 deletions
diff --git a/‎dist/immutable.min.js
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diff --git a/‎src/Operations.js
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@@ -2,6 +2,7 @@
 node_modules
 old
 npm-debug.log
+yarn-error.log
 .DS_Store
 *~
 *.swp
 
@@ -2,6 +2,8 @@ sudo: false
 language: node_js
 node_js: 7
 
+cache: yarn
+
 env:
   global:
     - CXX=g++-4.9
 
@@ -3102,8 +3102,7 @@
       var iterations = 0;
       iterable.__iterate(function(v, k, c)  {
         if (predicate.call(context, v, k, c)) {
-          iterations++;
-          return fn(v, useKeys ? k : iterations - 1, this$0);
+          return fn(v, useKeys ? k : iterations++, this$0);
         }
       }, reverse);
       return iterations;
 
@@ -315,8 +315,7 @@ export function filterFactory(iterable, predicate, context, useKeys) {
     var iterations = 0;
     iterable.__iterate((v, k, c) => {
       if (predicate.call(context, v, k, c)) {
-        iterations++;
-        return fn(v, useKeys ? k : iterations - 1, this);
+        return fn(v, useKeys ? k : iterations++, this);
       }
     }, reverse);
     return iterations;