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Transpose/Unzip Function (inverse of zip)?
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802
zip is its own inverse! Provided you use the special * operator.
>>> zip(*[('a', 1), ...
std::shared_ptr of this
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170
There is std::enable_shared_from_this just for this purpose. You inherit from it and you can cal...
How to concatenate two MP4 files using FFmpeg?
...peg -i opening.mkv -i episode.mkv -i ending.mkv \
-filter_complex "[0:v] [0:a] [1:v] [1:a] [2:v] [2:a]
concat=n=3:v=1:a=1 [v] [a]" \
-map "[v]" -map "[a]" output.mkv
Note that this method performs a re-encode.
2. concat demuxer
Use this method when you want...
Insert a line break in mailto body
I would like to insert a line break into my mailto body.
I tried %0A, %0D and %0D%0A. Nothing worked for me.
I tested on Gmail, Yahoo, Apple Mail, Outlook 2010, Outlook.com and Thunderbird with Google Chrome on Mac OSX.
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In which order should floats be added to get the most precise result?
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107
Your instinct is basically right, sorting in ascending order (of magnitude) usually improves th...
LESS CSS nesting classes
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mingosmingos
21k1010 gold badges6767 silver badges105105 bronze badges
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More elegant “ps aux | grep -v grep”
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edited Nov 8 '17 at 0:53
answered Feb 21 '12 at 10:31
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Java String split removed empty values
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506
split(delimiter) by default removes trailing empty strings from result array. To turn this mech...
generate days from date range
...ps, procedures, or temp tables. The subquery generates dates for the last 10,000 days, and could be extended to go as far back or forward as you wish.
select a.Date
from (
select curdate() - INTERVAL (a.a + (10 * b.a) + (100 * c.a) + (1000 * d.a) ) DAY as Date
from (select 0 as a union all...
Override ActiveRecord attribute methods
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answered Dec 18 '08 at 22:35
Aaron LongwellAaron Longwell
7,80355 gold badges1818 silver badges1010 bronze badges
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