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Good scalaz introduction [closed]
...from haskell and mathematics. Most articles that I found assume that you already feel comfortable with these concepts.
8 An...
Difference between single and double square brackets in Bash
I'm reading bash examples about if but some examples are written with single square brackets:
6 Answers
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Why would introducing useless MOV instructions speed up a tight loop in x86_64 assembly?
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You may want to read http://research.google.com/pubs/pub37077.html
TL;DR: randomly inserting nop instructions in programs can easily increase performance by 5% or more, and no, compilers cannot easily exploit this. It's usually a combinatio...
How to open every file in a folder?
...wd()):
with open(os.path.join(os.cwd(), filename), 'r') as f: # open in readonly mode
# do your stuff
Glob
Or you can list only some files, depending on the file pattern using the glob module:
import glob
for filename in glob.glob('*.txt'):
with open(os.path.join(os.cwd(), filename),...
When saving, how can you check if a field has changed?
...requires making alterations to your model, this one does not 3) as you can read in the comments on that answer, it has side-effects that can be potentially problematic, this solution does not
– Chris Pratt
Oct 31 '11 at 22:10
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Unable to simultaneously satisfy constraints, will attempt to recover by breaking constraint
...ier, self.constant];
}
@end
build it once again, and now you have more readable output for you:
once you got your id you can simple tap it in your Find Navigator:
and quickly find it:
HOW TO SIMPLE FIX THAT CASE?
try to change priority to 999 for broken constraint.
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Haskell function composition (.) and function application ($) idioms: correct use
I have been reading Real World Haskell , and I am nearing the end, but a matter of style has been niggling at me to do with the (.) and ($) operators.
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Should I prefer pointers or references in member data?
...at it makes the code easier to write it's that it makes the code easier to read. With a reference as a data member you never have to wonder if it can be null at point of use. This means that you can look at code with less context required.
– Len Holgate
Jan 4 '...
What is the meaning of “non temporal” memory accesses in x86
...nd not (immediately) consumed again, the fact that memory store operations read a full cache line first and then modify the cached data is detrimental to performance. This operation pushes data out of the caches which might be needed again in favor of data which will not be used soon. This is especi...
SQL: How to properly check if a record exists
While reading some SQL Tuning-related documentation, I found this:
9 Answers
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