Version 1

[yaffs-website] / node_modules / for-each / index.js

diff --git a/node_modules/for-each/index.js b/node_modules/for-each/index.js
new file mode 100644 (file)
index 0000000..93843da
--- /dev/null
+++ b/node_modules/for-each/index.js
@@ -0,0 +1,46 @@
+var isFunction = require('is-function')
+
+module.exports = forEach
+
+var toString = Object.prototype.toString
+var hasOwnProperty = Object.prototype.hasOwnProperty
+
+function forEach(list, iterator, context) {
+    if (!isFunction(iterator)) {
+        throw new TypeError('iterator must be a function')
+    }
+
+    if (arguments.length < 3) {
+        context = this
+    }
+    
+    if (toString.call(list) === '[object Array]')
+        forEachArray(list, iterator, context)
+    else if (typeof list === 'string')
+        forEachString(list, iterator, context)
+    else
+        forEachObject(list, iterator, context)
+}
+
+function forEachArray(array, iterator, context) {
+    for (var i = 0, len = array.length; i < len; i++) {
+        if (hasOwnProperty.call(array, i)) {
+            iterator.call(context, array[i], i, array)
+        }
+    }
+}
+
+function forEachString(string, iterator, context) {
+    for (var i = 0, len = string.length; i < len; i++) {
+        // no such thing as a sparse string.
+        iterator.call(context, string.charAt(i), i, string)
+    }
+}
+
+function forEachObject(object, iterator, context) {
+    for (var k in object) {
+        if (hasOwnProperty.call(object, k)) {
+            iterator.call(context, object[k], k, object)
+        }
+    }
+}