Is there any way to count the number of occurrences in a jQuery array?

Question

I have an array that I put together in jQuery and I\'m wondering if there is a way that I could find the number of occurrences of a given term. Would I have better results i

Answer 1

Method with $.grep() is more readable and contains fewer lines but it seems more performant with a little more lines in native javascript :

var myArray = ["youpi", "bla", "bli", "blou", "blou", "bla", "bli", "you", "pi", "youpi", "yep", "yeah", "bla", "bla", "bli", "you", "pi", "youpi", "yep", "yeah", "bla", "bla", "bli", "you", "pi", "youpi", "yep", "yeah", "bla", "bla", "bli", "you", "pi", "youpi", "yep", "yeah", "bla"];

// method 1 
var nbOcc = 0;
for (var i = 0; i < myArray.length; i++) {
  if (myArray[i] == "bla") {
    nbOcc++;
  }
}
console.log(nbOcc); // returns 9


// method 2
var nbOcc = $.grep(myArray, function(elem) {
  return elem == "bla";
}).length;
console.log(nbOcc); // returns 9

Js performances are available here : http://jsperf.com/counting-occurrences-of-a-specific-value-in-an-array