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What's the magic of “-” (a dash) in command-line parameters?
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114
If you mean the naked - at the end of the tar command, that's common on many commands that want ...
Grouped LIMIT in PostgreSQL: show the first N rows for each group?
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New solution (PostgreSQL 8.4)
SELECT
*
FROM (
SELECT
ROW_NUMBER() OVER (PARTITION BY section_id ORDER BY name) AS r,
t.*
FROM
xxx t) x
WHERE
x.r <= 2;
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Java 8 functional interface with no arguments and no return value
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Roland
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answered May 26 '14 at 11:22
assyliasassylias
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Installing specific laravel version with composer create-project
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146
From the composer help create-project command
The create-project command creates a new proj...
How do I convert a Java 8 IntStream to a List?
...l Bourque
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answered May 15 '14 at 9:48
Ian RobertsIan Roberts
112k1515...
How to concatenate strings with padding in sqlite
...'ve used is to start with your target string, say '0000', concatenate '0000423', then substr(result, -4, 4) for '0423'.
Update: Looks like there is no native implementation of "lpad" or "rpad" in SQLite, but you can follow along (basically what I proposed) here: http://verysimple.com/2010/01/12/sql...
Passing just a type as a parameter in C#
...Copsey
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1
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Shuffle two list at once with same order
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answered Apr 25 '14 at 9:45
sshashank124sshashank124
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Select first 4 rows of a data.frame in R
How can I select the first 4 rows of a data.frame :
5 Answers
5
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What's the difference between --general-numeric-sort and --numeric-sort options in gnu sort
...ort compares the numbers as floats, this allows scientific notation eg 1.234E10 but is slower and subject to rounding error (1.2345678 could come after 1.2345679), numeric sort is just a regular alphabetic sort that knows 10 comes after 9.
See http://www.gnu.org/software/coreutils/manual/html_...