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How to verifm>y m> if a file exists in a batch file?
... IF /? help file: The ELSE clause must occur on the same line as the commm>and m> after the IF. This burned me. hope it helps m>y m>ou.
– funkm>y m>mushroom
Feb 27 '14 at 17:58
...
Send string to stdin
...
This is coming from the stdin
EOF
or m>y m>ou can redirect output from a commm>and m>, like
diff <(ls /bin) <(ls /usr/bin)
or m>y m>ou can read as
while read line
do
echo =$line=
done < some_file
or simplm>y m>
echo something | read param
...
Short description of the scoping rules?
...e
Local — Names assigned in anm>y m> wam>y m> within a function (def or lambda), m>and m> not declared global in that function
Enclosing-function — Names assigned in the local scope of anm>y m> m>and m> all staticallm>y m> enclosing functions (def or lambda), from inner to outer
Global (module) — Names assigned at the to...
Curious null-coalescing operator custom implicit conversion behaviour
...hen there is a lifted conversion involving two nullable tm>y m>pes on the left-hm>and m> side of the coalescing operator.
I have not m>y m>et identified where preciselm>y m> things go wrong, but at some point during the "nullable lowering" phase of compilation -- after initial analm>y m>sis but before code generation -- we...
What's the (hidden) cost of Scala's lazm>y m> val?
One hm>and m>m>y m> feature of Scala is lazm>y m> val , where the evaluation of a val is delam>y m>ed until it's necessarm>y m> (at first access).
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omp parallel vs. omp parallel for
...r
specifm>y m>ing a parallel construct containing one worksharing construct
m>and m> no other statements. Permitted clauses are the union of the clauses
allowed for the parallel m>and m> worksharing contructs.
Taken from http://www.openmp.org/mp-documents/OpenMP3.0-Summarm>y m>Spec.pdf
The specs for OpenMP are...
Macro vs Function in C
I alwam>y m>s saw examples m>and m> cases where using a macro is better than using function.
11 Answers
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Should m>y m>ou choose the MONEm>Y m> or DECIMAL(x,m>y m>) datatm>y m>pes in SQL Server?
... to whether or not there is a real difference between the monem>y m> datatm>y m>pe m>and m> something like decimal(19,4) (which is what monem>y m> uses internallm>y m>, I believe).
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Accessing class variables from a list comprehension in the class definition
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Class scope m>and m> list, set or dictionarm>y m> comprehensions, as well as generator expressions do not mix.
The whm>y m>; or, the official word on this
In Pm>y m>thon 3, list comprehensions were given a proper scope (local namespace) of their own, to p...
How to log PostgreSQL queries?
...t the log_directorm>y m> directorm>y m> alreadm>y m> exists inside of the data directorm>y m>, m>and m> that the postgres user can write to it.
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