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Why should eval be avoided in Bash, and what should I use instead?
...\n"
# 2 -> "$2"
# 3 -> "$3"
# 4 -> "$4"
# etc.
printf "$1\n" "${@:2}"
}
function error
{
# Send the first element as one argument, and the rest of the elements as a combined argument.
# Arguments to println:
# 1 -> '\e[31mError (%d): %s\e[m'
...
Why and not taking font-family and font-size from body?
...fault, browsers render most form elements (textareas, text boxes, buttons, etc) using OS controls or browser controls. So most of the font properties are taken from the theme the OS is currently using.
You'll have to target the form elements themselves if you want to change their font/text styles -...
What are some better ways to avoid the do-while(0); hack in C++?
...(RET(computation_result), ENSURE_SUCCESS(computation_result, return_code), etc.).
C++ offers extra tools over C:
The cleanup block functionality can be implemented as RAII, meaning you no longer need the entire cleanup block and enabling client code to add early return statements.
You throw whene...
Variable number of arguments in C++?
...builder pattern (as in operator<<() in streams) or default arguments etc. These are all safer: the compiler gets to know more about what you're trying to do so there are more occasions it can stop you before you blow your leg off.
...
Exit a Script On Error
...n the script of that command
# exit the script or return to try again, etc.
exit $errorCode # or use some other value or do return instead
}
trap f ERR
# do some stuff
false # returns 1 so it triggers the trap
# maybe do some other stuff
Other traps can be set to handle other signals, inc...
What does “xmlns” in XML mean?
...the appropriate xmlns. For example, mash up friend of a friend with vCard, etc.
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Maven command to list lifecycle phases along with bound goals?
... echo " (examples: 'clean,install', 'deploy', 'install', etc...) "
echo
echo " [*directory] The directories (with pom.xml files) to run the command in"
exit 0;
;;
-d|--debug)
debug=true;
echo "debu...
Writing a compiler in its own language
...ode to convert \n to the character with the decimal code 10 (and \r to 13, etc).
After that compiler is ready, you will start to reimplement it in C. This process is called "bootstrapping".
The string parsing code will become:
...
if (c == 92) { // backslash
c = getc();
if (c == 110) { //...
Is the order of elements in a JSON list preserved?
...hen by the language-specific objects (Dictionary, NSDictionary, Hashtable, etc) that are used as an internal representation.
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New Array from Index Range Swift
...as many asserts. As I usually want slice to fail if I provide false ranges etc.
– eonist
Jan 9 '17 at 12:19
...