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What does it mean in shell when we put a command inside dollar sign and parentheses: $(command)
...theses, it will first run echo foo then will try to run foo which gives an error
– Accountant م
Apr 18 '19 at 17:25
...
How do I push amended commit to the remote Git repository?
...ve resolved any conflicts, you can push again.
So:
git pull
If you get errors in pull, maybe something is wrong in your local repository configuration (I had a wrong ref in the .git/config branch section).
And after
git push
Maybe you will get an extra commit with the subject telling about a...
What are “res” and “req” parameters in Express functions?
...
I noticed one error in Dave Ward's answer (perhaps a recent change?):
The query string paramaters are in request.query, not request.params. (See https://stackoverflow.com/a/6913287/166530 )
request.params by default is filled with the va...
How to split strings across multiple lines in CMake?
...t;STREQUAL:${CMAKE_CXX_SIMULATE_ID},MSVC>>"
">:"
"-Wall -Werror "
">$<"
"$<CXX_COMPILER_ID:GNU>:"
"-Wno-multichar -Wno-sign-compare "
">")
add_compile_options(${WARNING_OPTIONS})
This is because the resulting options are passed to the compiler in quotes
/us...
How does “cat
...f the variable PS2, processed as described in Shell Variables, to standard error before reading each line of input until the delimiter has been recognized.
Examples
Some examples not yet given.
Quotes prevent parameter expansion
Without quotes:
a=0
cat <<EOF
$a
EOF
Output:
0
With qu...
Convert list to tuple in Python
...4]: tuple = tuple(l)
In [5]: tuple
Out[5]: (4, 5, 6)
then you get a TypeError since the tuple itself is not callable:
In [6]: tuple(l)
TypeError: 'tuple' object is not callable
You can recover the original definition for tuple by quitting and restarting your interpreter, or (thanks to @glglgl)...
Difference between events and delegates and its respective applications [closed]
...
Events can't directly be assigned. In this case you can't do the previous error that I have showed with overriding the behavior.
No one outside of your class can raise the event.
Events can be included in an interface declaration, whereas a field cannot
notes
EventHandler is declared as the foll...
What is the ellipsis (…) for in this method signature?
...oid process(String[] s){}
void process(String...s){}
then a compile-time error occurs.
Source: The Java Programming Language specification, where the technical term is variable arity parameter rather than the common term varargs.
...
Difference between string and char[] types in C++
...SVCP90.dll -> you get two heaps -> memory cannot be freed, assertion errors in debug mode if libfoo modifies the string reference and hands an std::string with a new pointer back.
– Cygon
Aug 21 '09 at 20:27
...
GNU Makefile rule generating a few targets from a single source file
...
This answer has an error. Yo can have parallel builds working perfectly. You just have to change file-a.out file-b.out: input.in.intermediate to file-a.out file-b.out: input.in.intermediate ; See stackoverflow.com/questions/37873522/… for mor...