inArray & in string

Question

i need to check if a string is in array as part of a string of any item in the array. Lets say one of the items in the array is "Hello World" and the string is "ello", I need that to return true.

Answer 1

Yeah, you could do all that. Or-

if(String(array).indexOf('ello')!=-1){
     ello is in the array
}

Answer 2

Just step through the array and check each string.

function isStringInArray(data, stringToFind) {
    for (var i = 0; i < data.length; i++) {
        if (data[i].indexOf(stringToFind) > -1) return true;
    }
    return false;
}

Answer 3

If you have a modern browser or want to polyfill Array.prototype.some() (alternatively use a library such as Underscore).

var contains = ['A', 'Hello World'].some(function(member) {
    return ~member.indexOf('ello');
});

jsFiddle.

You tagged this jQuery so you could also use this (will work in all browsers you probably care about)...

var contains = !!$.grep(['A', 'Hello World'], function(member) {
    return ~member.indexOf('ello');
}).length;

jsFiddle.

Answer 4

You could do something like this:

function contains(arr, str) {
    var i = 0,
        len = arr.length;

    for (; i < len; ++i) {
        if (arr[i].indexOf(str) > -1) {
            return true;
        }
    } 
    return false; 
}

Obviously it's naive in a few ways, for example it doesn't account for case sensitivity, nor does it tell you which or how many items matched, but you can easily modify it to do so.