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30-seconds-of-code/snippets/coalesce.md
Mathias Bynens 8ee50178f3 Avoid confusing prototype methods for static methods
Correct: `Array.from()` (it’s a static method)
Incorrect: `Array.join()` (doesn’t exist; it’s a prototype method)

This patch uses the common `#` syntax to denote `.prototype.`.
2018-09-28 15:44:12 -04:00

295 B

coalesce

Returns the first non-null/undefined argument.

Use Array.prototype.find() to return the first non null/undefined argument.

const coalesce = (...args) => args.find(_ => ![undefined, null].includes(_));
coalesce(null, undefined, '', NaN, 'Waldo'); // ""