Add Array#reduce shim for IE8

nodeca · Aug 1, 2012 · eeabb3a · eeabb3a
1 parent 1f64fb0
commit eeabb3a
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Showing 4 changed files with 45 additions and 3 deletions.
diff --git a/demo/js/js-yaml.js b/demo/js/js-yaml.js
@@ -61,6 +61,20 @@ if (!Array.prototype.map) {
   };
 }
 
+if (!Array.prototype.reduce) {
+  Array.prototype.reduce = function (iterator, memo) {
+    if (undefined === memo) {
+      memo = this[0];
+    }
+
+    this.forEach(function (val, key) {
+      memo = iterator(memo, val);
+    });
+
+    return memo;
+  };
+}
+
 if (!Function.prototype.bind) {
   Function.prototype.bind = function bind(context) {
     var func = this;

diff --git a/js-yaml.js b/js-yaml.js
@@ -61,6 +61,20 @@ if (!Array.prototype.map) {
   };
 }
 
+if (!Array.prototype.reduce) {
+  Array.prototype.reduce = function (iterator, memo) {
+    if (undefined === memo) {
+      memo = this[0];
+    }
+
+    this.forEach(function (val, key) {
+      memo = iterator(memo, val);
+    });
+
+    return memo;
+  };
+}
+
 if (!Function.prototype.bind) {
   Function.prototype.bind = function bind(context) {
     var func = this;

diff --git a/js-yaml.min.js b/js-yaml.min.js
diff --git a/support/browserify/30_extensions.js b/support/browserify/30_extensions.js
@@ -39,6 +39,20 @@ if (!Array.prototype.map) {
   };
 }
 
+if (!Array.prototype.reduce) {
+  Array.prototype.reduce = function (iterator, memo) {
+    if (undefined === memo) {
+      memo = this[0];
+    }
+
+    this.forEach(function (val, key) {
+      memo = iterator(memo, val);
+    });
+
+    return memo;
+  };
+}
+
 if (!Function.prototype.bind) {
   Function.prototype.bind = function bind(context) {
     var func = this;