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Fix #3170 (#3173)

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Aya Morisawa
2018-11-09 11:01:55 +09:00
committed by syuilo
parent 21d9afebc3
commit a9436306ab
2 changed files with 8 additions and 10 deletions
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4
src/prelude/array.ts
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@@ -18,6 +18,10 @@ 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));
}
export function unique<T>(xs: T[]): T[] {
return [...new Set(xs)];
}