[JS practice] Pluck function(读取数组中相同属性的项目)

Title :
Pluck (读取数组中相同属性的项目)


Implement pluck, which takes an array of objects and a property name, and returns an array containing the named property of each object.

我用到了循环,不过似乎还有更简单的方法哦 🙂

For example:

pluck([{a:1}, {a:2}], 'a') // -> [1,2]

If an object is missing the property, you should just leave it as undefined in the output array.

Normal solution :

function pluck(objs, name) {
  var rtArr = [];
  if(name == "" || objs.length == 0) {
    return rtArr;
  return rtArr; 

Best solution :

function pluck(objs, name) {
  return objs.map(function(obj) { return obj[name] });

Ref. from codewars


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