Index: src/harmony-array.js |
diff --git a/src/harmony-array.js b/src/harmony-array.js |
index 06fada7581db15aa7f576f9f9c615d8e1053e66c..488d6fd7887568a75380d6785dd63c78249e2cd7 100644 |
--- a/src/harmony-array.js |
+++ b/src/harmony-array.js |
@@ -127,6 +127,41 @@ function ArrayFill(value /* [, start [, end ] ] */) { // length == 1 |
return array; |
} |
+// Proposed for ES7 |
+// https://github.com/tc39/Array.prototype.includes |
+// 6e3b78c927aeda20b9d40e81303f9d44596cd904 |
+function ArrayIncludes(searchElement, fromIndex) { |
Dmitry Lomov (no reviews)
2014/12/02 12:25:25
Since it is not a ES6 feature, Array.prototype.inc
|
+ var array = ToObject(this); |
+ var len = ToLength(array.length); |
+ |
+ if (len === 0) { |
+ return false; |
+ } |
+ |
+ var n = ToInteger(fromIndex); |
+ |
+ var k; |
+ if (n >= 0) { |
+ k = n; |
+ } else { |
+ k = len + n; |
+ if (k < 0) { |
+ k = 0; |
+ } |
+ } |
+ |
+ while (k < len) { |
+ var elementK = array[k]; |
+ if (SameValueZero(searchElement, elementK)) { |
+ return true; |
+ } |
+ |
+ ++k; |
+ } |
+ |
+ return false; |
+} |
+ |
// ES6, draft 05-22-14, section 22.1.2.3 |
function ArrayOf() { |
var length = %_ArgumentsLength(); |
@@ -150,8 +185,11 @@ function HarmonyArrayExtendArrayPrototype() { |
"of", ArrayOf |
)); |
+ %FunctionSetLength(ArrayIncludes, 1); |
+ |
// Set up the non-enumerable functions on the Array prototype object. |
InstallFunctions($Array.prototype, DONT_ENUM, $Array( |
+ "includes", ArrayIncludes, |
"find", ArrayFind, |
"findIndex", ArrayFindIndex, |
"fill", ArrayFill |