Try this code,
This adds the .indexOf() in non-supported browsers
if (!Array.prototype.indexOf) {
Array.prototype.indexOf = function (searchElement /*, fromIndex */ ) {
"use strict";
if (this == null) {
throw new TypeError();
}
var t = Object(this);
var len = t.length >>> 0;
if (len === 0) {
return -1;
}
var n = 0;
if (arguments.length > 0) {
n = Number(arguments[1]);
if (n != n) { // shortcut for verifying if it's NaN
n = 0;
} else if (n != 0 && n != Infinity && n != -Infinity) {
n = (n > 0 || -1) * Math.floor(Math.abs(n));
}
}
if (n >= len) {
return -1;
}
var k = n >= 0 ? n : Math.max(len - Math.abs(n), 0);
for (; k < len; k++) {
if (k in t && t[k] === searchElement) {
return k;
}
}
return -1;
}
}
Adding contains method in Array prototype
Array.prototype.contains = function(){
for(var i=0,len=arguments.length;i<len;i++){
if(this.indexOf(arguments[i]) !== -1){
return true;
}
}
return false;
}
Now, you can use like this,
var cats = [
'Abyssinian',
'Balinese',
'Bombay',
'Birman'];
if(cats.contains('Balinese')){
console.log('Balinese');
}
if(cats.contains('Balinese','Bombay')){
console.log('Balinese,Bombay');
}
if(cats.contains('lines','Bombay')){
console.log('lines,Bombay');
}
if(cats.contains('lines','mbay')){
console.log('lines,mbay');
}
If you are using jQuery, this code can be made simpler :)
