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How do I use shell variables in an awk script?
...f the environment variable ("${v}"):
% awk -vv="${v}" 'BEGIN { print v }'
123test
Or to make it clearer (with far fewer vs):
% environment_variable=123test
% awk -vawk_variable="${environment_variable}" 'BEGIN { print awk_variable }'
123test
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SQL order string as number
... | 0 /* the string does not contain a number, so the result is 0 */
'123miles' | 123
'$123' | 0 /* the left side of the string does not start with a number */
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Easy way to pull latest of all git submodules
...answered Dec 11 '14 at 19:38
abc123abc123
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How are echo and print different in PHP? [duplicate]
...and a ", 1, 2, 3; // comma-separated without parentheses
echo ("and a 123"); // just one parameter with parentheses
print() can only take one parameter:
print ("and a 123");
print "and a 123";
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Removing numbers from string [closed]
...ng/regular expressions:
For Python 2:
from string import digits
s = 'abc123def456ghi789zero0'
res = s.translate(None, digits)
# 'abcdefghizero'
For Python 3:
from string import digits
s = 'abc123def456ghi789zero0'
remove_digits = str.maketrans('', '', digits)
res = s.translate(remove_digits)
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Convert Long into Integer
...
Here are three ways to do it:
Long l = 123L;
Integer correctButComplicated = Integer.valueOf(l.intValue());
Integer withBoxing = l.intValue();
Integer terrible = (int) (long) l;
All three versions generate almost identical byte code:
0 ldc2_w <Long 123>...
Alarm Manager Example
I want to implement a schedule function in my project. So I Googled for an Alarm manager program but I can`t find any examples.
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Exporting a function in shell
Please tell me how to export a function in parent shell (bash, sh or ksh) so that the function will be available to all the child process launced from the parent process?
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Nginx url重写rewrite实例详解 - 更多技术 - 清泛网 - 专注IT技能提升
...匹配；!~为不区分大小写不匹配
就是当用户输入 www.a.com.cn 自动跳转到www.a.com 这个域名：
rewrite ^/(.*)$ http://www.a.com/$1 permanent; 或者cname
例如下面设定nginx在用户使用ie的使用重定向到/nginx-ie目录下：
if ($http_user_agent ~ MSIE) {
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Nginx url重写rewrite实例详解 - 更多技术 - 清泛网 - 专注IT技能提升
...匹配；!~为不区分大小写不匹配
就是当用户输入 www.a.com.cn 自动跳转到www.a.com 这个域名：
rewrite ^/(.*)$ http://www.a.com/$1 permanent; 或者cname
例如下面设定nginx在用户使用ie的使用重定向到/nginx-ie目录下：
if ($http_user_agent ~ MSIE) {
...