大约有 40,000 项符合查询结果（耗时：0.0430秒） [XML]
What is the proper way to check if a string is empty in Perl?
...
I think that length is the closest test that we have to the expression of the idea that there is nothing in the string.
– brian d foy
Jan 12 '10 at 11:23
...
send mail from linux terminal in one line [closed]
...
echo "Subject: test" | /usr/sbin/sendmail user@domain.com
This enables you to do it within one command line without having to echo a text file. This answer builds on top of @mti2935's answer. So credit goes there.
...
Android and setting width and height programmatically in dp units
...
simplest way(and even works from api 1) that tested is:
getResources().getDimensionPixelSize(R.dimen.example_dimen);
From documentations:
Retrieve a dimensional for a particular resource ID for use as a size
in raw pixels. This is the same as getDimension(int),...
A quick and easy way to join array elements with a separator (the opposite of split) in Java [duplic
... is easy to avoid this kind of wasted time. Second, it might be faster to test the size of the incoming strings and pass the result into the constructor of the StringBuilder... haven't test that but I suspect it might be a win... if you really care about "fast".
– BPS
...
How to convert a SVG to a PNG with ImageMagick?
...me using: /Applications/Inkscape.app/Contents/Resources/bin/inkscape -z -e test.png -w 1024 -h 1024 test.svg
– chmullig
Mar 14 '14 at 0:26
11
...
How can I randomize the lines in a file using standard tools on Red Hat Linux?
... then
mv $i.new $i
else
echo "Error for file $i!"
fi
done
Untested, but hopefully works.
share
|
improve this answer
|
follow
|
...
How is mime type of an uploaded file determined by browser?
...r upload, it looks at the first buffer of data it receives and then runs a test on it. These tests try to determine if the file is a known mime type or not, and if known mime type it will simply further test it for which known mime type and take action accordingly. I think IE tries to do this first ...
Any reason not to use '+' to concatenate two strings?
...
I have done a quick test:
import sys
str = e = "a xxxxxxxxxx very xxxxxxxxxx long xxxxxxxxxx string xxxxxxxxxx\n"
for i in range(int(sys.argv[1])):
str = str + e
and timed it:
mslade@mickpc:/binks/micks/ruby/tests$ time python /binks/m...
How to get the current time in milliseconds from C in Linux?
...
@vitaly.v.ch I did a test, passing the tz param of gettimeofday() as &(struct timezone tz = {480, 0}) won't get any warning, and it don't have any effect to the result, that makes sense, since the long representation of time is not relevant t...
App restarts rather than resumes
...
This question is still relevant in 2016. Today a QA tester reported an app of mine restarting rather than resuming from the stock launcher in Android M.
In reality, the system was adding the launched activity to the current task-stack, but it appeared to the user as if a rest...