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How to delete a row by reference in data.table?
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125
Good question. data.table can't delete rows by reference yet.
data.table can add and delete co...
What does the caret (^) character mean?
... than one parent. HEAD^ is short for HEAD^1, and you can also address HEAD^2 and so on as appropriate.
You can get to parents of any commit, not just HEAD. You can also move back through generations: for example, master~2 means the grandparent of the tip of the master branch, favoring the first par...
super() raises “TypeError: must be type, not classobj” for new-style class
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246
Alright, it's the usual "super() cannot be used with an old-style class".
However, the import...
How do I temporarily disable triggers in PostgreSQL?
...ion:
SET session_replication_role = DEFAULT;
Source: http://koo.fi/blog/2013/01/08/disable-postgresql-triggers-temporarily/
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What is the difference between a .xib file and a .storyboard?
... Francisco Corrales Morales
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answered Dec 8 '11 at 19:33
Sagar HatekarSagar Hatekar
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Canvas width and height in HTML5
...lurry pixelated zoom-in
// with each canvas pixel drawn showing as roughly 2x2 on screen
canvas.width = 400;
canvas.height = 300;
canvas.style.width = '800px';
canvas.style.height = '600px';
See this live example of a canvas that is zoomed in by 4x.
var c = document.getElementsByTagName('c...
How to get line count of a large file cheaply in Python?
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Pair/tuple data type in Go
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edited Mar 13 '18 at 10:29
Ivan Aracki
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Label encoding across multiple columns in scikit-learn
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In java how to get substring from a string till a character c?
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edited May 28 '13 at 17:40
Anirudha
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