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Extract substring using regexp in plain bash
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Using pure bash :
$ cat file.txt
US/Central - 10:26 PM (CST)
$ while read a b time x; do [[ $b == - ]] && echo $time; done < file.txt
another solution with bash regex :
$ [[ "US/Central - 10:26 PM (CST)" =~ -[[:space:]]*([0-9]{2}:[...
Grepping a huge file (80GB) any way to speed it up?
...p will tell you. Some versions of the man also say that the former is deprecated for the latter, but the shorter form is too convenient to die.
– Walter Tross
Jun 7 '16 at 16:20
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What is time_t ultimately a typedef to?
...e bottom line is that the type of time_t is not guaranteed in the C specification.
The time_t datatype is a data type in
the ISO C library defined for storing
system time values. Such values are
returned from the standard time()
library function. This type is a
typedef defined in the s...
Understanding the map function
... answered Jun 11 '12 at 1:50
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Is String.Format as efficient as StringBuilder
...some benchmarking:
http://jdixon.dotnetdevelopersjournal.com/string_concatenation_stringbuilder_and_stringformat.htm
Updated:
Sadly the link above has since died. However there's still a copy on the Way Back Machine:
http://web.archive.org/web/20090417100252/http://jdixon.dotnetdevelopers...
Case-INsensitive Dictionary with string key-type in C#
...s find the answer to any coding question on here! Maybe I'll name my next cat after you, Konrad! :-)
– Jamie
Jun 3 '14 at 21:36
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How to specify a multi-line shell variable?
... Not sure why you want or need the leading line break. For my application I did not so I just started with sql="SELECT c2, c2
– bhfailor
Jan 30 '18 at 1:31
1
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Insert new column into table in sqlite?
...ALTER TABLE {tableName} ADD COLUMN COLNew {type};
Second, and more complicatedly, but would actually put the column where you want it, would be to rename the table:
ALTER TABLE {tableName} RENAME TO TempOldTable;
Then create the new table with the missing column:
CREATE TABLE {tableName} (name...
Getting Chrome to accept self-signed localhost certificate
I have created a self-signed SSL certificate for the localhost CN. Firefox accepts this certificate after initially complaining about it, as expected. Chrome and IE, however, refuse to accept it, even after adding the certificate to the system certificate store under Trusted Roots. Even though the c...
How to merge 2 JSON objects from 2 files using jq?
...sing this command: "jq -s 'add' config.json other/*.json" but when I do a "cat config.json" it is not merged. How can I put the output back to the file?
– Renato Bibiano
Jan 3 at 13:02
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