62 lines
1.8 KiB
Mathematica
62 lines
1.8 KiB
Mathematica
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/**
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Copyright 2018 Google Inc. All rights reserved.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at:
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#import "FBLPromise+Reduce.h"
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#import "FBLPromisePrivate.h"
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@implementation FBLPromise (ReduceAdditions)
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- (FBLPromise *)reduce:(NSArray *)items combine:(FBLPromiseReducerBlock)reducer {
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return [self onQueue:FBLPromise.defaultDispatchQueue reduce:items combine:reducer];
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}
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- (FBLPromise *)onQueue:(dispatch_queue_t)queue
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reduce:(NSArray *)items
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combine:(FBLPromiseReducerBlock)reducer {
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NSParameterAssert(queue);
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NSParameterAssert(items);
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NSParameterAssert(reducer);
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FBLPromise *promise = self;
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for (id item in items) {
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promise = [promise chainOnQueue:queue
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chainedFulfill:^id(id value) {
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return reducer(value, item);
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}
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chainedReject:nil];
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}
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return promise;
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}
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@end
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@implementation FBLPromise (DotSyntax_ReduceAdditions)
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- (FBLPromise * (^)(NSArray *, FBLPromiseReducerBlock))reduce {
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return ^(NSArray *items, FBLPromiseReducerBlock reducer) {
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return [self reduce:items combine:reducer];
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};
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}
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- (FBLPromise * (^)(dispatch_queue_t, NSArray *, FBLPromiseReducerBlock))reduceOn {
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return ^(dispatch_queue_t queue, NSArray *items, FBLPromiseReducerBlock reducer) {
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return [self onQueue:queue reduce:items combine:reducer];
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};
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}
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@end
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