parent
a80a2d1760
commit
5b9efa4291
@ -0,0 +1,42 @@
|
|||||||
|
// Warn if overriding existing method
|
||||||
|
if(Array.prototype.equals)
|
||||||
|
console.warn("Overriding existing Array.prototype.equals. Possible causes: New API defines the method, there's a framework conflict or you've got double inclusions in your code.");
|
||||||
|
// attach the .equals method to Array's prototype to call it on any array
|
||||||
|
Array.prototype.equals = function (array) {
|
||||||
|
// if the other array is a falsy value, return
|
||||||
|
if (!array)
|
||||||
|
return false;
|
||||||
|
|
||||||
|
// compare lengths - can save a lot of time
|
||||||
|
if (this.length != array.length)
|
||||||
|
return false;
|
||||||
|
|
||||||
|
for (var i = 0, l=this.length; i < l; i++) {
|
||||||
|
// Check if we have nested arrays
|
||||||
|
if (this[i] instanceof Array && array[i] instanceof Array) {
|
||||||
|
// recurse into the nested arrays
|
||||||
|
if (!this[i].equals(array[i]))
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
else if (this[i] != array[i]) {
|
||||||
|
// Warning - two different object instances will never be equal: {x:20} != {x:20}
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
// Hide method from for-in loops
|
||||||
|
Object.defineProperty(Array.prototype, "equals", {enumerable: false});
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
Array.prototype.matchItems = function (array) {
|
||||||
|
// if the other array is a falsy value, return
|
||||||
|
if (!array)
|
||||||
|
return [];
|
||||||
|
|
||||||
|
return this.filter(item => array.includes(item));
|
||||||
|
}
|
||||||
|
// Hide method from for-in loops
|
||||||
|
Object.defineProperty(Array.prototype, "matchItems", {enumerable: false});
|
Loading…
Reference in new issue