Determine whether an array contains a value [duplicate]
jQuery has a utility function for this:
$.inArray(value, array)Returns index of value in array. Returns -1 if array does not contain value.
See also How do I check if an array includes an object in JavaScript?
var contains = function(needle) { // Per spec, the way to identify NaN is that it is not equal to itself var findNaN = needle !== needle; var indexOf; if(!findNaN && typeof Array.prototype.indexOf === 'function') { indexOf = Array.prototype.indexOf; } else { indexOf = function(needle) { var i = -1, index = -1; for(i = 0; i < this.length; i++) { var item = this[i]; if((findNaN && item !== item) || item === needle) { index = i; break; } } return index; }; } return indexOf.call(this, needle) > -1;};You can use it like this:
var myArray = [0,1,2], needle = 1, index = contains.call(myArray, needle); // true
This is generally what the indexOf() method is for. You would say:
return arrValues.indexOf('Sam') > -1