How to handle magic number in javascript

Question

I have search through google with keyword handle javascript magic number but couldn't find one. In c# i would used constant defined number but i don't know what to use in javascript

something like this

public class MagicNumberHelper
{
  const int optionA = 1;
  const int optionB = 2:
  const int optionC = 3
}

http://stackoverflow.com/questions/2821509/can-you-use-constant-variables-in-javascript — Anders Lindahl, May 20 '11 at 07:10
@ Alin Purcaru if(number == 1) DoA(); else if(number == 2) DoB(); 1 and 2 are magic number. — Sarawut Positwinyu, May 20 '11 at 07:27
Disregard my answer (deleted). It seems `const` is not a standard feature of JS. It will be added in `2.0`. — Alin Purcaru, May 20 '11 at 07:40

score 3 · Answer 1 · answered May 20 '11 at 07:09

3

Translating that to JS (one of the ways to do it):

var MagicNumberHelper = {
  optionA: 1,
  optionB: 2,
  optionC: 3
}

answered May 20 '11 at 07:09

Blender

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score 1 · Accepted Answer · answered May 20 '11 at 07:10

1

is it just a constant number that you can test for later in that case

var MagicNumbers = {
 optionA: 1,
 optionB: 2,
 optionC: 3
};

and then later test for it like this

if(inputNr == MagicNumbers.optionA) {
  // your logic here
}

answered May 20 '11 at 07:10

megakorre

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How to handle magic number in javascript

2 Answers2