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Comparison between the different ways of checking if a value is an array.
var A = [1, 2, 3, 4, 5],
C = [[1, 2], [3, 4], [5, 6], [7, 8], [9, 10]];
function fnIsArr(arr){
return Array.isArray(arr);
}
var isArr = Array.isArray;
var Ar = Array;
Array.prototype.isArr = true;
Ready to run.
Test | Ops/sec | |
---|---|---|
Instance of Array A |
| ready |
IsArray A |
| ready |
Constructor of A |
| ready |
Array-only method check |
| ready |
Fn isArr |
| ready |
cached isArray |
| ready |
Cached constructor |
| ready |
Array.prototype.isArr |
| ready |
You can edit these tests or add more tests to this page by appending /edit to the URL.