Today I Learned - Rocky Kev

TIL of this switch shorthand

POSTED ON:

TAGS: javascript

This snippet is so freakin' awesome.

Say you had a switch statement fire a function.

// Longhand
switch (data) {
  case 1:
    test1();
  break;

  case 2:
    test2();
  break;

  case 3:
    test();
  break;
  // And so on...
}

// Shorthand
var data = {
  1: test1,
  2: test2,
  3: test
};

data[anything] && data[anything]();

The shorthand does the following:

  1. Check if the value exists in the object
  2. then fires the value as a function data[anything]()

via Blessing Hirwa's 17 Javascript optimization tips to know in 2021

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