How to find if an array contains a specific string in JavaScript/jQuery?

javascript jquery arrays string
Cofey picture Cofey · May 24, 2011 · Viewed 943.2k times · Source

Can someone tell me how to detect if "specialword" appears in an array? Example:

categories: [
    "specialword"
    "word1"
    "word2"
]

Answer

James picture James · Mar 7, 2013

You really don't need jQuery for this.

var myarr = ["I", "like", "turtles"];
var arraycontainsturtles = (myarr.indexOf("turtles") > -1);

Hint: indexOf returns a number, representing the position where the specified searchvalue occurs for the first time, or -1 if it never occurs

or

function arrayContains(needle, arrhaystack)
{
    return (arrhaystack.indexOf(needle) > -1);
}

It's worth noting that array.indexOf(..) is not supported in IE < 9, but jQuery's indexOf(...) function will work even for those older versions.

Related questions

Convert javascript array to string

I'm trying to iterate over a "value" list and convert it into a string. Here is the code: var blkstr = $.each(value, function(idx2,val2) { var str = idx2 + ":" + val2; alert(str); return str; }).get().join(", "); alert() function works just fine …

Read More
jQuery - remove duplicates from an array of strings

Possible Duplicate: Easiest way to find duplicate values in a JavaScript array jQuery.unique on an array of strings I'm trying to get a neighbor list by breadth-first search (to be specific: the indexes of same color neighbor balls in …

Read More
How to insert an item into an array at a specific index (JavaScript)?

I am looking for a JavaScript array insert method, in the style of: arr.insert(index, item) Preferably in jQuery, but any JavaScript implementation will do at this point.

Read More