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30-seconds-of-code/snippets/coalesce.md
2022-06-08 12:30:49 +03:00

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Argument coalescing type beginner blog_images/flower-portrait-1.jpg 2017-12-17T10:08:55+02:00 2020-09-15T16:28:04+03:00

Returns the first defined, non-null argument.

  • Use Array.prototype.find() and Array.prototype.includes() to find the first value that is not equal to undefined or null.
const coalesce = (...args) => args.find(v => ![undefined, null].includes(v));
coalesce(null, undefined, '', NaN, 'Waldo'); // ''