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karol-majewski/flatMap.ts

Last active February 2, 2023 13:48
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The simplest flatMap implementation in TypeScript
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flatMap.ts
export function flatMap<T, U>(array: T[], callbackfn: (value: T, index: number, array: T[]) => U[]): U[] {
return Array.prototype.concat(...array.map(callbackfn));
}
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