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Merge branch '077-common-checks-macros-with-effects' into 76-common-checks-in-actor-sheets

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Johannes Loher 2021-03-29 21:46:46 +02:00
commit 10a0561616
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37
src/module/common/utils.ts
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@ -1,37 +0,0 @@
/**
* Partition an array into two, following a predicate.
* @param input - The Array to split.
* @param predicate - The predicate by which to split.
* @returns A tuple of two arrays, the first one containing all elements from `input` that match the predicate, the second one containing those that do not.
*/
export function partition<T>(input: Array<T>, predicate: (v: T) => boolean): [T[], T[]] {
return input.reduce(
(p: [Array<T>, Array<T>], cur: T) => {
if (predicate(cur)) {
p[0].push(cur);
} else {
p[1].push(cur);
}
return p;
},
[[], []],
);
}
/**
* Zips two Arrays to an array of pairs of elements with corresponding indices. Excessive elements are dropped.
* @param a1 - First array to zip.
* @param a2 - Second array to zip.
*
* @typeParam T - Type of elements contained in `a1`.
* @typeParam U - Type of elements contained in `a2`.
*
* @returns The array of pairs that had the same index in their source array.
*/
export function zip<T, U>(a1: Array<T>, a2: Array<U>): Array<[T, U]> {
if (a1.length <= a2.length) {
return a1.map((e1, i) => [e1, a2[i]]);
} else {
return a2.map((e2, i) => [a1[i], e2]);
}
}