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How to write a Ruby switch statement (case…when) with regex and backreferences?
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152
The references to the latest regex matching groups are always stored in pseudo variables $1 to...
Run Cron job every N minutes plus offset
...-59/20 * * * *
Explanation
An * in the minute field is the same as 0-59/1 where 0-59 is the range and 1 is the step. The command will run at the first minute in the range (0), then at all successive minutes that are distant from the first by step (1), until the last (59).
Which is why */20 * * *...
Meaning of $? (dollar question mark) in shell scripts
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This is the exit status of the last executed command.
For example the command true always retu...
Difference between pre-increment and post-increment in a loop?
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a++ is known as postfix.
add 1 to a, returns the old value.
++a is known as prefix.
add 1 to a, returns the new value.
C#:
string[] items = {"a","b","c","d"};
int i = 0;
foreach (string item in items)
{
Console.WriteLine(++i);
}
Console.WriteLin...
What is the zero for string?
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edited May 6 '13 at 11:41
answered Oct 3 '12 at 6:51
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.net implementation of bcrypt
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answered May 16 '09 at 22:02
ineine
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How to check if a string “StartsWith” another string?
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19 Answers
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Proxies with Python 'Requests' module
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Is \d not supported by grep's basic expressions?
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grep's default mode is (iirc) POSIX regex, and \d is pcre. You can either pass -P to gnu grep,...