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authorAya Morisawa <AyaMorisawa4869@gmail.com>2018-11-09 11:01:55 +0900
committersyuilo <Syuilotan@yahoo.co.jp>2018-11-09 11:01:55 +0900
commita9436306abbb504e7746ff5821b6fe2daac1e4fe (patch)
tree142e191d93e73326bef135e52fc706734b80ee09 /src/prelude/array.ts
parentUpdate autobind-decorator requirement from 2.1.0 to 2.2.1 (#3151) (diff)
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Fix #3170 (#3173)
Diffstat (limited to 'src/prelude/array.ts')
-rw-r--r--src/prelude/array.ts4
1 files changed, 4 insertions, 0 deletions
diff --git a/src/prelude/array.ts b/src/prelude/array.ts
index 54f7081712..42f05dc0c9 100644
--- a/src/prelude/array.ts
+++ b/src/prelude/array.ts
@@ -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)];
}