JAVASCRIPT

pluck javascript

function pluck(arr, key) {
  return arr.map(obj => obj[key]);
}

javascript pluck

// Write a function that returns an array of only the objects with truthy values
// for the passed in key.
//
// pluckTruthy({a: 1, b: '', c: false}, 'a') => [1]
// pluckTruthy({a: 1, b: '', c: false}, 'b') => []
// pluckTruthy({a: 1, b: '', c: false}, 'c') => []
// pluckTruthy({a: 1, b: '', c: false}, 'd') => []
//
function pluckTruthy(obj, key) {
  var result = [];
  for (var i = 0; i < obj.length; i++) {
    if (obj[i][key]) {
      result.push(obj[i][key]);
    }
  }
  return result;
}

// console.log(pluckTruthy({a: 1, b: '', c: false}, 'a'));

javascript pluck

Example 1:

 <script type="text/javascript">
          var list = [{name: 'jack', age: 14}, {name: 'jill', age: 15},
                             {name: 'humpty', age: 16}];
          console.log(_.pluck(list, 'age'));
    </script>
    

Example 2:

 <script type="text/javascript">
         var goal  = [
        {
            "category" : "other",
            "title" : "harry University",
            "value" : 50000,
            "id":"1"
        },
        {
            "category" : "traveling",
            "title" : "tommy University",
            "value" : 50000,
            "id":"2"
        },
        {
            "category" : "education",
            "title" : "jerry University",
            "value" : 50000,
            "id":"3"
        },
        {    
            "category" : "business",
            "title" : "Charlie University",
            "value" : 50000,
            "id":"4"
        }
    ]
    console.log(_.pluck(goal, 'category'));
    </script>