reactivecocoa confuse about sequence.array












1















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;









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    1















    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;









    share|improve this question

























      1












      1








      1








      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;









      share|improve this question














      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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      asked Nov 23 '18 at 14:55









      lynnlynn

      62




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