What is the equivalents of php functions push_array and in_array in javascript?
Arrays are simple (not multidimensional).
Haven't found something native.
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3 Answers
You're looking for the push method and the indexOf method.
Note that indexOf is not supported by IE, so you'll need to implement it yourself, like this:
if (!Array.prototype.indexOf)
{
Array.prototype.indexOf = function(searchElement /*, fromIndex */)
{
"use strict";
if (this === void 0 || 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 !== (1 / 0) && n !== -(1 / 0))
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;
};
}
(copied from MDC)
Comments
push_array:
This is native to the Array object in JavaScript:
var someArray = [];
someArray.push(value);
in_array:
This is not native to the Array in JavaScript however some browsers have support for Array.indexOf which can be compared to -1. If that is not supported than you need to iterate over the items.
function inArray(elem, array) {
if (array.indexOf) {
return array.indexOf(elem) > -1;
}
for (var i = 0, length = array.length; i < length; i++) {
if (array[ i ] === elem ) {
return true;
}
}
return false;
}
Comments
You have to be using the JavaScript Array object. Then you can use .push().
For find: How do I check if an array includes an object in JavaScript?
