Possible Duplicate:
array.contains(obj) in JavaScript
Let's say I have an array = [0,8,5]
What is the fastest way to know if 8 is inside this one.. for example:
if(array.contain(8)){
// return true
}
I found this : Fastest way to check if a value exist in a list (Python)
and this : fastest way to detect if a value is in a set of values in Javascript
But this don't answer to my question. Thank you.
Use indexOf() to check whether value is exist or not
array.indexOf(8)
Sample Code,
var arr = [0,8,5];
alert(arr.indexOf(8)); //returns key
For IE support
//IE support
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function(obj, start) {
for (var i = (start || 0), j = this.length; i < j; i++) {
if (this[i] === obj) { return i; }
}
return -1;
}
}
var arr = [0,8,5];
alert(arr.indexOf(8))
Array.indexOf doesn't work in IE < 9.
Array.prototype.indexOf if it doesn't exist.You can use a indexOf() function
var fruits = ["a1", "a2", "a3", "a4"];
var a = fruits.indexOf("a3");
The output will be: 2
Array.indexOf doesn't work in IE < 9.
You can use indexOf or you can try this:
$.inArray(value, array)
phpjs has a nice php's in_array function's port to javascript, you may use it
http://phpjs.org/functions/in_array/
see example:
in_array('van', ['Kevin', 'van', 'Zonneveld']);
