function in_array(needle, haystack, argStrict) {
    //  discuss at: http://phpjs.org/functions/in_array/
    // original by: Kevin van Zonneveld (http://kevin.vanzonneveld.net)
    // improved by: vlado houba
    // improved by: Jonas Sciangula Street (Joni2Back)
    //    input by: Billy
    // bugfixed by: Brett Zamir (http://brett-zamir.me)
    //   example 1: in_array('van', ['Kevin', 'van', 'Zonneveld']);
    //   returns 1: true
    //   example 2: in_array('vlado', {0: 'Kevin', vlado: 'van', 1: 'Zonneveld'});
    //   returns 2: false
    //   example 3: in_array(1, ['1', '2', '3']);
    //   example 3: in_array(1, ['1', '2', '3'], false);
    //   returns 3: true
    //   returns 3: true
    //   example 4: in_array(1, ['1', '2', '3'], true);
    //   returns 4: false

    var key = '';
    var strict = !!argStrict;

    //we prevent the double check (strict && arr[key] === ndl) || (!strict && arr[key] == ndl)
    //in just one for, in order to improve the performance
    //deciding wich type of comparation will do before walk array
    if (strict) {
        for (key in haystack) {
            if (haystack[key] === needle) {
                return true;
            }
        }
    } else {
        for (key in haystack) {
            if (haystack[key] == needle) {
                return true;
            }
        }
    }

    return false;
}

module.exports = in_array;
