大约有 40,000 项符合查询结果（耗时：0.0278秒） [XML]
How to convert a string to lower case in Bash?
...ous ways:
POSIX standard
tr
$ echo "$a" | tr '[:upper:]' '[:lower:]'
hi all
AWK
$ echo "$a" | awk '{print tolower($0)}'
hi all
Non-POSIX
You may run into portability issues with the following examples:
Bash 4.0
$ echo "${a,,}"
hi all
sed
$ echo "$a" | sed -e 's/\(.*\)/\L\1/'
hi all
# t...
Deny access to one specific folder in .htaccess
...
Create site/includes/.htaccess file and add this line:
Deny from all
share
|
improve this answer
|
follow
|
...
How to use double or single brackets, parentheses, curly braces
...veral more
Also, brace expansions create lists of strings which are typically iterated over in loops:
$ echo f{oo,ee,a}d
food feed fad
$ mv error.log{,.OLD}
(error.log is renamed to error.log.OLD because the brace expression
expands to "mv error.log error.log.OLD")
$ for num in {000..2}; do ech...
Removing array item by value
...
The most powerful solution would be using array_filter, which allows you to define your own filtering function.
But some might say it's a bit overkill, in your situation...
A simple foreach loop to go trough the array and remove the item you don't want should be enough.
Something lik...
Why shouldn't `'` be used to escape single quotes?
...
Fyodor Soikin
59.5k66 gold badges9898 silver badges140140 bronze badges
answered Jan 18 '10 at 3:37
cletuscletus
...
XAMPP - Port 80 in use by “Unable to open process” with PID 4! 12
...RVER)" also uses port 80 and so it should be stopped if MS-SQL sever is insalled on your machine.
– johnkarka
Nov 21 '15 at 12:01
1
...
Detecting iOS / Android Operating system
... @feeela sometimes the feature is something like being able to install apks, which isn't possible to detect.
– Daniel Lubarov
Mar 7 '16 at 21:11
2
...
pandas DataFrame: replace nan values with average of columns
... bmubmu
28.2k1111 gold badges8282 silver badges9898 bronze badges
10
...
When should I use a trailing slash in my URL?
...
In my personal opinion trailing slashes are misused.
Basically the URL format came from the same UNIX format of files and folders, later on, on DOS systems, and finally, adapted for the web.
A typical URL for this book on a Unix-like operating system would be a file path such as...
Vagrant's port forwarding not working [closed]
...
Larry CaiLarry Cai
40.7k2929 gold badges9898 silver badges136136 bronze badges
add a comment
...