Merge pull request #30 from Voltra/master

Predicate base collection manipulation

Author: TheSTL

implementations/every.js

@@ -0,0 +1,28 @@
+/**
+ *
+  every() exectues a provided *predicate* on each element of
+  the array until it is not fulfilled.
+
+  every() has two parameters:
+
+  - the predicate callback function
+  - a *this* argument for the callback. If none is provided, *this* will not be set in the predicate
+
+  The predicate function one to three arguments:
+
+  - the value of current element
+  - the index of the current element
+  - the Array object being traversed
+
+  If the predicate is not fulfilled then the method will exit early (and return false).
+
+  Calling every on an empty array will return true.
+*/
+Array.prototype.myEvery = function myEvery(predicate, thisArg){
+    for(var i = 0 ; i < this.length ; ++i){
+        if(!predicate.call(thisArg, this[i], i, this))
+            return false;
+    }
+    
+    return true;
+}

implementations/none.js

@@ -0,0 +1,28 @@
+/**
+ *
+  none() exectues a provided *predicate* on each element of
+  the array until it is fulfilled.
+
+  none() has two parameters:
+
+  - the predicate callback function
+  - a *this* argument for the callback. If none is provided, *this* will not be set in the predicate
+
+  The predicate function one to three arguments:
+
+  - the value of current element
+  - the index of the current element
+  - the Array object being traversed
+
+  If the predicate is fulfilled then the method will exit early (and return false).
+
+  Calling none on an empty array will return true.
+*/
+Array.prototype.myNone = function myNone(predicate, thisArg){
+    for(var i = 0 ; i < this.length ; ++i){
+        if(predicate.call(thisArg, this[i], i, this))
+            return false;
+    }
+    
+    return true;
+}

implementations/some.js

@@ -0,0 +1,28 @@
+/**
+ *
+  some() exectues a provided *predicate* on each element of
+  the array until it is fulfilled.
+
+  some() has two parameters:
+
+  - the predicate callback function
+  - a *this* argument for the callback. If none is provided, *this* will not be set in the predicate
+
+  The predicate function one to three arguments:
+
+  - the value of current element
+  - the index of the current element
+  - the Array object being traversed
+
+  If the predicate is fulfilled then the method will exit early (and return true).
+
+  Calling some on an empty array will return false.
+*/
+Array.prototype.mySome = function mySome(predicate, thisArg){
+    for(var i = 0 ; i < this.length ; ++i){
+        if(predicate.call(thisArg, this[i], i, this))
+            return true;
+    }
+    
+    return false;
+};