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How to check if a folder exists
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You need to transform your Path into a File and test for existence:
for(Path entry: stream){
if(entry.toFile().exists()){
log.info("working on file " + entry.getFileName());
}
}
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Is there a way to detect if an image is blurry?
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Yes, it is. Compute the Fast Fourier Transform and analyse the result. The Fourier transform tells you which frequencies are present in the image. If there is a low amount of high frequencies, then the image is blurry.
Defining the terms 'low' and 'high' is up ...
How to get access to HTTP header information in Spring MVC REST controller?
...o read the incoming character stream. StreamSource works as a holder for a transformation source in the form of a stream of XML markup.
– Debojit Saikia
Oct 25 '13 at 16:11
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How to get full path of a file?
...ility called realpath in coreutils 8.15.
realpath file.txt
/data/ail_data/transformed_binaries/coreutils/test_folder_realpath/file.txt
As per @styrofoam-fly and @arch-standton comments, realpath alone doesn't check for file existence, to solve this add the e argument: realpath -e file
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Is there a list of screen resolutions for all Android based phones and tablets? [closed]
... 160 1280 x 800 8:5 1.6000 1280 x 800
ASUS Transformer 10" 1280 x 800 mdpi 1 160 1280 x 800 8:5 1.6000 1280 x 800
ASUS Transformer 2 10" 1920 x 1200 hdpi 1.5 240 1280 x 800 ...
Check if string contains only digits
...]?\d+$/.test(value) to allow both comma and point decimal (later maybe can transform comma to point)
– Lucke
Oct 19 '17 at 23:54
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Why are Subjects not recommended in .NET Reactive Extensions?
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It depends on the situation. Good Rx design tends to transform the system towards an async/reactive architecture. It can be hard to cleanly integrate small components of reactive code with a system that's of imperative design. The band aid solution is to use Subjects to turn im...
What Haskell representation is recommended for 2D, unboxed pixel arrays with millions of pixels?
... linear algebra libs, doesn't allow to express convolutions, fft and other transforms).
Almost every time a new Array has to be built from the existing one, an intermediate list of values has to be constructed (like in matrix multiplication from the Gentle Introduction). The cost of array construct...
How to print a groupby object
...t of groupby is separate kind of object, a GroupBy object. You must apply, transform, or filter to get back to a DataFrame or Series.
If all you wanted to do was sort by the values in columns A, you should use df.sort('A').
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Good scalaz introduction [closed]
... Tony Morris and by Rúnar Bjarnason
State monad by Michael Pilquist
Monad transformers by Jordan West
(Copied from my answer of a closed duplicate).
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