大约有 30,000 项符合查询结果（耗时：0.0465秒） [XML]
Bash if statement with multiple conditions throws an error
...
Use -a (for and) and -o (for or) operations.
tldp.org/LDP/Bash-Beginners-Guide/html/sect_07_01.html
Update
Actually you could still use && and || with the -eq operation. So your script would be like this:
my_error...
How can I extract a good quality JPEG image from a video file with ffmpeg?
Currently I am using this command to extract the images:
2 Answers
2
...
How do I use vi keys in ipython under *nix?
Currently in Bash I use set -o vi to enable vi mode in my bash prompt.
6 Answers
6
...
What does each of the [y,n,q,a,d,/,K,j,J,g,e,?] stand for in context of git -p
When using -p mode of git add -p or git stash -p what does each of the letters stand for?
2 Answers
...
Prevent wrapping of span or div
I'd like to put a group of div elements of fixed width into a container and have the horizontal scroll bar appeared. The div / span elements should appear in a line, left to right in the order they appear in the HTML (essentially unwrapped).
...
How to get VM arguments from inside of Java application?
... if some option that can be passed to JVM is explicitly set or has its default value.
5 Answers
...
Effect of a Bitwise Operator on a Boolean in Java
The bitwise operators are supposed to travel variables and operate on them bit by bit. In the case of integers, longs, chars this makes sense. These variables can contain the full range of values enforced by their size.
...
Grepping a huge file (80GB) any way to speed it up?
This has been running for an hour on a fairly powerful linux server which is otherwise not overloaded.
Any alternative to grep? Anything about my syntax that can be improved, (egrep,fgrep better?)
...
Yes/No message box using QMessageBox
How do I show a message box with Yes/No buttons in Qt, and how do I check which of them was pressed?
6 Answers
...
How do I break out of a loop in Perl?
I'm trying to use a break statement in a for loop, but since I'm also using strict subs in my Perl code, I'm getting an error saying:
...