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Is there a “null coalescing” operator in JavaScript?
... status here.
It looks like this:
x ?? y
Example
const response = {
settings: {
nullValue: null,
height: 400,
animationDuration: 0,
headerText: '',
showSplashScreen: false
}
};
const undefinedValue = response.settings?.undefinedValue ?? 'some other default'; // result: ...
How do I parse command line arguments in Bash?
...# save it in an array for later
shift # past argument
;;
esac
done
set -- "${POSITIONAL[@]}" # restore positional parameters
echo "FILE EXTENSION = ${EXTENSION}"
echo "SEARCH PATH = ${SEARCHPATH}"
echo "LIBRARY PATH = ${LIBPATH}"
echo "DEFAULT = ${DEFAULT}"
echo "Number file...
What are some uses of template template parameters?
...
Say you're using CRTP to provide an "interface" for a set of child templates; and both the parent and the child are parametric in other template argument(s):
template <typename DERIVED, typename VALUE> class interface {
void do_something(VALUE v) {
static_cast...
Need to reset git branch to origin version
... Is there an easy way to do this? I tried deleting the branch and then resetting up the tracking branch, but it just gives me the version I was working on again.
...
Fast Linux File Count for a large number of files
I'm trying to figure out the best way to find the number of files in a particular directory when there are a very large number of files ( > 100,000).
...
How to read a file line-by-line into a list?
How do I read every line of a file in Python and store each line as an element in a list?
28 Answers
...
Invoke a callback at the end of a transition
... FadeOut method (similar to jQuery) using D3.js . What I need to do is to set the opacity to 0 using transition() .
9 Ans...
Using awk to print all columns from the nth to the last
This line worked until I had whitespace in the second field.
24 Answers
24
...
Bash function to find newest file matching pattern
...w can I find the latest (newest, earliest, oldest) file in a directory?
unset -v latest
for file in "$dir"/*; do
[[ $file -nt $latest ]] && latest=$file
done
share
|
improve this answer
...
How to use arguments from previous command?
...nd entry in the history (if it's still available depending on your history settings). Useful if you display the history number in each prompt.
– 816-8055
Nov 22 '19 at 13:32
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