Usage

fork([1, 2, 3, 4], (n) => n % 2 === 0);
// [[2, 4], [1, 3]]

Installation

CLI

npx atmx add helper fork

Manually

Copy and paste the following method into @/utils/helpers/fork.ts:

/**
* Split an array into two array based on a true/false condition
* function.
*
* @example
* fork([1, 2, 3, 4], (n) => n % 2 === 0)
* // [[2, 4], [1, 3]]
*/
export function fork<T>(
array: readonly T[],
condition: (item: T) => boolean,
): [T[], T[]] {
const forked: [T[], T[]] = [[], []];
if (array) {
for (const item of array) {
  forked[condition(item) ? 0 : 1].push(item);
}
}
return forked;
}