From e14509574d534a74fcebf9515146b028bbdec153 Mon Sep 17 00:00:00 2001
From: MeiMei <30769358+mei23@users.noreply.github.com>
Date: Fri, 27 Sep 2019 04:58:28 +0900
Subject: AP featured collectionの修正 / Collection Activityの対応 /
 typeの修正など (#5460)
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* resolver type / fix updateFeatured

* type ApObject

* fix strange type

* AP Activity

* Collection Activityが失敗したらとりあえず無視
---
 src/prelude/array.ts | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/prelude/array.ts')

diff --git a/src/prelude/array.ts b/src/prelude/array.ts
index 44482c57cd..839bbc920b 100644
--- a/src/prelude/array.ts
+++ b/src/prelude/array.ts
@@ -120,3 +120,11 @@ export function cumulativeSum(xs: number[]): number[] {
 export function fromEntries(xs: [string, any][]): { [x: string]: any; } {
 	return xs.reduce((obj, [k, v]) => Object.assign(obj, { [k]: v }), {} as { [x: string]: any; });
 }
+
+export function toArray<T>(x: T | T[] | undefined): T[] {
+	return Array.isArray(x) ? x : x != null ? [x] : [];
+}
+
+export function toSingle<T>(x: T | T[] | undefined): T | undefined {
+	return Array.isArray(x) ? x[0] : x;
+}
-- 
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