reactivecocoa confuse about sequence.array
I want to get grouped array from [1, 2, 2, 3, 3, 3, 4, 4, 4, 4] to [[1], [2, 2], [3, 3, 3], [4, 4, 4, 4]].
I've written two types of code. The first one works fine, but the second one doesn't. anyone can tell me why? thanks
RACSignal *signal = @[@1, @2, @3, @4,@2,@3,@3,@4,@4,@4].rac_sequence.signal;
// first
NSArray *arr0 = [[[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence;
}].sequence
map:^(RACSequence *sequence) {
return sequence.array;
}].array;
// second
NSArray *arr1 = [[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence.array;
}].sequence.array;
objective-c reactive-cocoa
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I want to get grouped array from [1, 2, 2, 3, 3, 3, 4, 4, 4, 4] to [[1], [2, 2], [3, 3, 3], [4, 4, 4, 4]].
I've written two types of code. The first one works fine, but the second one doesn't. anyone can tell me why? thanks
RACSignal *signal = @[@1, @2, @3, @4,@2,@3,@3,@4,@4,@4].rac_sequence.signal;
// first
NSArray *arr0 = [[[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence;
}].sequence
map:^(RACSequence *sequence) {
return sequence.array;
}].array;
// second
NSArray *arr1 = [[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence.array;
}].sequence.array;
objective-c reactive-cocoa
add a comment |
I want to get grouped array from [1, 2, 2, 3, 3, 3, 4, 4, 4, 4] to [[1], [2, 2], [3, 3, 3], [4, 4, 4, 4]].
I've written two types of code. The first one works fine, but the second one doesn't. anyone can tell me why? thanks
RACSignal *signal = @[@1, @2, @3, @4,@2,@3,@3,@4,@4,@4].rac_sequence.signal;
// first
NSArray *arr0 = [[[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence;
}].sequence
map:^(RACSequence *sequence) {
return sequence.array;
}].array;
// second
NSArray *arr1 = [[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence.array;
}].sequence.array;
objective-c reactive-cocoa
I want to get grouped array from [1, 2, 2, 3, 3, 3, 4, 4, 4, 4] to [[1], [2, 2], [3, 3, 3], [4, 4, 4, 4]].
I've written two types of code. The first one works fine, but the second one doesn't. anyone can tell me why? thanks
RACSignal *signal = @[@1, @2, @3, @4,@2,@3,@3,@4,@4,@4].rac_sequence.signal;
// first
NSArray *arr0 = [[[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence;
}].sequence
map:^(RACSequence *sequence) {
return sequence.array;
}].array;
// second
NSArray *arr1 = [[signal
groupBy:^(NSNumber *object) {
return [NSString stringWithFormat:@"%@",object];
}]
map:^(RACSignal *signal) {
return signal.sequence.array;
}].sequence.array;
objective-c reactive-cocoa
objective-c reactive-cocoa
asked Nov 23 '18 at 14:55
lynnlynn
62
62
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add a comment |
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