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How can I remove all objects but one from the workspace in R?
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Here is a simple construct that will do it, by using setdiff:
rm(list=setdiff(ls(), "x"))
And a full example. Run this at your own risk - it will remove all variables except x:
x <- 1
y <- 2
z <- 3
ls()
[1] "x" "y" "z"
rm(list=setdiff(ls(), "x"))
ls()
[...
How do I paste multi-line bash codes into terminal and run it all at once?
... echo Hello!
}
hello
You can paste and verify in a terminal using bash by:
Starting with (
Pasting your text, and pressing Enter (to make it pretty)... or not
Ending with a ) and pressing Enter
Example:
imac:~ home$ ( function hello {
> echo Hello!
> }
> hello
> )
Hello!
im...
Determine the path of the executing BASH script [duplicate]
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Contributed by Stephane CHAZELAS on c.u.s.
Assuming POSIX shell:
prg=$0
if [ ! -e "$prg" ]; then
case $prg in
(*/*) exit 1;;
(*) prg=$(command -v -- "$prg") || exit;;
esac
fi
dir=$(
cd -P -- "$(dirname -- "$prg")" &&am...
PHP substring extraction. Get the string before the first '/' or the whole string
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by the way, you can do explode("/", $string, 2)[0] in php 5.5
– billynoah
Oct 24 '14 at 15:40
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How do I convert a datetime to date?
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import time
import datetime
# use mktime to step by one day
# end - the last day, numdays - count of days to step back
def gen_dates_list(end, numdays):
start = end - datetime.timedelta(days=numdays+1)
end = int(time.mktime(end.timetuple()))
start = int(time.mktime(...
Tool for comparing 2 binary files in Windows [closed]
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vBinDiff doesn't seem to deal with inserted bytes at all, so it's really not much better than HxD except that it shows you all the changes in red.
– endolith
Feb 11 '16 at 21:13
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Lint: How to ignore “ is not translated in ” errors?
..."the localization files are not perfect yet". They are being filled little by little. translatable="false" would prevent anybody from translating.
– Nicolas Raoul
Nov 5 '12 at 7:38
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How can I delay a method call for 1 second?
... you can select the UI elements).
So you just need to call this snippet by writing dispatch in code:
share
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Fastest way to convert JavaScript NodeList to Array?
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You can shave a little more time by using Array(length) rather than creating the array and then separately sizing it. If you then use const to declare the array and its length, with a let inside the loop, it ends up about 1.5% faster than the above method: ...
Changing cursor to waiting in javascript/jquery
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this is by far the easiest and simplest implementation that you can do. Thanks a lot.
– JC203
Sep 19 '16 at 16:38
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