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Rename: setDifference -> difference (#3177)

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* Improve setDifference

* Rename: setDifference -> difference
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Aya Morisawa 2018-11-09 14:14:53 +09:00 • committed by GitHub
parent 9aa65fb600
commit 3c0d2db3bc
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2 changed files with 8 additions and 4 deletions
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8
src/prelude/array.ts
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@ -18,8 +18,12 @@ export function erase<T>(x: T, xs: T[]): T[] {
return xs.filter(y => x !== y);
}
export function setDifference<T>(xs: T[], ys: T[]): T[] {
return xs.filter(x => !ys.includes(x));
/**
* Finds the array of all elements in the first array not contained in the second array.
* The order of result values are determined by the first array.
*/
export function difference<T>(includes: T[], excludes: T[]): T[] {
return includes.filter(x => !excludes.includes(x));
}
export function unique<T>(xs: T[]): T[] {