java - Can Stream#limit return fewer elements than expected? -


If there are at least n elements in the stream s What are the situations where the stream can be less than n elements in the stream sLimit , if any? 

  stream sLimit = s.limit (n);

The cause of the question: In, I have read that:

Despite the appearance, border (10) Not necessarily a result of a SIZED stream with 10 elements - this can be reduced.

I think the answers to Holger and Sotiros are accurate, but because the man Have given the statement, I think I should tell myself.

I'm mainly talking about, especially SIZED attribute This is basically a "stable" notification about the stream stages, which is known at the time of pipeline setup, But before the stream actually executes. Actually, it is used to determine the current performance strategy, so it should be known before the stream is executed.

Border () Operation creates a bunuwaahi, which is its upstream splitterter, hence the boundary spliterator needs to determine which features to be refunded needed. Even if its upstream splittercutter is SIZED , then it does not know the exact size, so it must close the SIZED property.

So if you wanted to, programmer, write: 

  IntStream.range (0, 100) .limit (10)

You say must there are 10 elements in that section (and it will be.) But the resulting splitter-maker is still not SIZED . After all, the limit operator does not know the difference between the above and the: 

  IntStream.range (0, 1) .limit (10)  
 This is because, even if there are times when it appears that this should be done, then  border

operator returns a stream of known size This does not affect the sharing strategy in turn, which affects parallel efficiency.


Comments

Post a Comment

Popular posts from this blog

python - Overriding the save method in Django ModelForm -

I'm having trouble overriding a ModelForm save method. I get this error I'm: Exception type: TypeErier Exception Value: Save () found an unexpected keyword argument 'committed' My intentions include a form 3 fields Submit several values ​​for, then create an object for each combination of those areas, and to save each object file models.py class collarsult type (models.Model): id = model. AutoField (db_column = 'icontact_result_code_type_id', primary_key = true) callResult = models.ForeignKey ( 'CallResult', db_column = 'icontact_result_code_id') campaign = models.ForeignKey ( 'campaign', db_column = 'icampaign_id') CALLTYPE = models.ForeignKey ( 'CALLTYPE', db_column = 'icall_type_id') agent = models.BooleanField (db_column = 'bagent', default = true) teamLeader = models.BooleanField (db_column = 'bTeamLeader', default = true) active = models.BooleanField (db_column = Django.form...
Read more

html - CSS autoheight, but fit content to height of div -

I have a div in which there are three children- div in the left and middle div: float: left while true: float: true because it is my layout Actually will spoil, I've used ClearFix Hack: .cf {zoom: 1; }. Cf: First,. Cf: {content: ""; Display: Table; }. Cf: After {clear: both; } It still works, but I want to be the right div an indicator. So it should fill 100% of the parent unit of height. How can I complete this? PS is the full code: & Lt; / Div & gt; & Lt; Div class = "mobile_content" & gt; & Lt; H5 & gt; {{Data.titel}} & lt; / H5> & Lt; Table & gt; & Lt; TR & gt; & Lt; Th & gt; Komponist: & lt; / Th & gt; & Lt; TD & gt; {{Data.komponist}} & lt; / TD & gt; & Lt; / TR & gt; & Lt; TR & gt; & Lt; Th & gt; Instrument: & lt; / Th & gt; & Lt; TD & gt; {{Data.instrumente}} & lt; / TD & gt; & Lt; / TR & gt;...
Read more

qt - How to prevent QAudioInput from automatically boosting the master volume to 100%? -

I have been trying to use Qt5 multimedia to record audio with QAudioInput, however, when I see If QAudioInput is started, it increases the master volume of my sound device to 100%. How can I prevent QAudioInput from changing the master volume? My current development platform is Linux with PalsAdio (with flat audio disabled). How can I use QAudioInput : QAudioDeviceInfo device_info = QAudioDeviceInfo :: defaultInputDevice (); QAudio format format; Format.setSampleRate (44100); Format.setChannelCount (1); Format.setSampleSize (16); Format.setCodec ("Audio / PCM"); Format.setSampleType (QAudioFormat :: SignedInt); Format.setByteOrder (QAudioFormat :: LittleEndian); Std :: cout & lt; & Lt; Device_info.deviceName (). ToUtf8 (). ConstData () & lt; & Lt; Std :: endl; QAudioInput * default_device = new QAudioInput (device_info, format); QIODevice * default_io_device = default_device-> Start (); a QAudioInput.setVolume () method is not you I ...
Read more