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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...
What is the exact problem with multiple inheritance?
...tion, local to enclosing function, object members, class members, globals, etc.), I don't see how an extra scope would make a difference.
– marcus
Nov 29 '11 at 19:15
...
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...
What does Redis do when it runs out of memory?
...OC-STATS - Show allocator internal stats"
/usr/local/etc/redis.conf
############################## MEMORY MANAGEMENT ################################
# Set a memory usage limit to the specified amount of bytes.
# When the memory limit is reached Redis will try to remove keys...
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) { //...