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Argument coalescing
JavaScript, Type · Sep 15, 2020
Returns the first defined, non-null argument.
- Use
Array.prototype.find()andArray.prototype.includes()to find the first value that is not equal toundefinedornull.
const coalesce = (...args) => args.find(v => ![undefined, null].includes(v));coalesce(null, undefined, '', NaN, 'Waldo'); // ''More like this
Argument coalescing factory
JavaScript, Function
Customizes a coalesce function that returns the first argument which is
truebased on the given validator.Value is async function
JavaScript, Type
Checks if the given argument is an
asyncfunction.Value is generator function
JavaScript, Type
Checks if the given argument is a generator function.