Jquery how to find an Object by attribute in an Array

Question

Given I have an array of \"purpose\" objects:

//array of purpose objects:
var purposeObjects = [
    {purpose: \"daily\"},
    {purpose: \"weekly\"},
    {pu         


        

Answer 1

copied from polyfill Array.prototype.find code of Array.find, and added the array as first parameter.

you can pass the search term as predicate function

// Example
var listOfObjects = [{key: "1", value: "one"}, {key: "2", value: "two"}]
var result = findInArray(listOfObjects, function(element) {
  return element.key == "1";
});
console.log(result);

// the function you want
function findInArray(listOfObjects, predicate) {
      if (listOfObjects == null) {
        throw new TypeError('listOfObjects is null or not defined');
      }

      var o = Object(listOfObjects);

      var len = o.length >>> 0;

      if (typeof predicate !== 'function') {
        throw new TypeError('predicate must be a function');
      }

      var thisArg = arguments[1];

      var k = 0;

      while (k < len) {
        var kValue = o[k];
        if (predicate.call(thisArg, kValue, k, o)) {
          return kValue;
        }
        k++;
      }

      return undefined;
}