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Make copy of an array
... time, don't matter. The more important point is that src.clone() is more readable and has far less opportunity for error than allocating a new array and doing arraycopy. (And also happens to be fast.)
– Brian Goetz
Mar 17 at 14:03
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GPL and LGPL open source licensing restrictions [closed]
I am having trouble understanding the usage permissions of open source. I read somewhere that GPL or LGPL enforces that software that uses GPL software must also be released open-source. I want to create an application that uses some open-source image recognition library. Can I sell this application...
How to sparsely checkout only one single file from a git repository?
...true)
adding what you want to see in the .git/info/sparse-checkout file
re-reading the working tree to only display what you need
To re-read the working tree:
$ git read-tree -m -u HEAD
That way, you end up with a working tree including precisely what you want (even if it is only one file)
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Select first 4 rows of a data.frame in R
... character (matching the respective names):
df[row.index, column.index]
Read help(`[`) for more detail on this subject, and also read about index matrices in the Introduction to R.
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improv...
Fetch frame count with ffmpeg
...ffprobe -v error -count_frames -select_streams v:0 -show_entries stream=nb_read_frames -of default=nokey=1:noprint_wrappers=1 input.mkv
This is a slow method.
Add the -skip_frame nokey option to only count key frames.
ffmpeg: Count the number of frames
If you do not have ffprobe you can use ff...
How can I send an HTTP POST request to a server from Excel using VBA?
What VBA code is required to perform an HTTP POST from an Excel spreadsheet?
6 Answers
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Why specify @charset “UTF-8”; in your CSS file?
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It tells the browser to read the css file as UTF-8. This is handy if your CSS contains unicode characters and not only ASCII.
Using it in the meta tag is fine, but only for pages that include that meta tag.
Read about the rules for character set r...
Using Excel OleDb to get sheet names IN SHEET ORDER
I'm using OleDb to read from an excel workbook with many sheets.
11 Answers
11
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On duplicate key ignore? [duplicate]
...nd You have to take into account potential performance hit. Instead of one read and potential one write You get read, write (delete row), write (insert row) and write(update index), so 1x read and 3x write (at best, if only one index is updated)..
– matt
Oct 18...
Javascript date.getYear() returns 111 in 2011? [duplicate]
...nally (but it has since been updated to use getFullYear()). I would never read w3schools for anything :)
– JK.
Jul 24 '12 at 21:33
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