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miguelmota/iota.js

Created March 22, 2019 19:22
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Node.js iota (Golang iota equivalent)
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iota.js
const iota = (() => { let n = 0; return () => n++ })()
const myEnum = {
foo: iota(), // 0
bar: iota(), // 1
baz: iota(), // 2
qux: iota(), // 3
}
@fannyhasbi
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Thanks, this helps!

@crra
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crra commented Oct 15, 2020

If you want to set the start index:

const iota = (() => {
  let n;
  return (start = 0) => {
    n = (n !== undefined && n + 1) || start;
    return n;
  };
})();

const myEnum = Object.freeze({
  foo: iota(-1), // -1
  bar: iota(), // 0
  baz: iota(), // 1
  qux: iota(), // 2
});

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