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ccapndave/when.ts

Created November 1, 2022 08:05
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when.ts
function when<A, B>(value: A | null, f: (value: A) => B): B | null;
function when<A, B>(value: A | undefined, f: (value: A) => B): B | undefined;
function when<A, B>(value: A, f: (value: A) => B) {
return value === null || value === undefined ? f(value) : value;
}
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