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Can dplyr package be used for conditional mutating?
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220
Use ifelse
df %>%
mutate(g = ifelse(a == 2 | a == 5 | a == 7 | (a == 1 & b == 4), 2,
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Change the URL in the browser without loading the new page using JavaScript
...sal to make search engines see hashes: googlewebmastercentral.blogspot.com/2009/10/…
– LKM
Oct 8 '09 at 21:03
5
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Remove textarea inner shadow on Mobile Safari (iPhone)
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answered Jun 20 '10 at 5:49
LyonLyon
6,9541010 gold badges2727 silver badges4545 bronze badges
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django import error - No module named core.management
...e problem!
– kstratis
Aug 18 '12 at 20:19
7
Also, er... remember to activate the virtualenv. D'oh...
Do the parentheses after the type name make a difference with new?
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In C++1998 there are 2 types of initialization: zero and default
In C++2003 a 3rd type of initialization, value initialization was added.
Assume:
struct A { int m; }; // POD
struct B { ~B(); int m; }; // non-POD, compiler generated default ctor
struct C { C() : m() {}; ~C(); int m; }; // non-...
Warning :-Presenting view controllers on detached view controllers is discouraged
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209
To avoid getting the warning in a push navigation, you can directly use :
[self.view.window.r...
How to turn on WCF tracing?
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20
Go to your Microsoft SDKs directory. A path like this:
C:\Program Files (x86)\Microsoft SDKs\W...
Create SQL script that create database and tables
...99% better
– ewitkows
Jul 26 '12 at 20:34
CJM's answer is still not enough. After application of CJM's method you shou...
Android 4.2: back stack behaviour with nested fragments
...? Even getFragments is not public method? stackoverflow.com/a/42572412/4729203
– wonsuc
Apr 24 '17 at 9:09
It worked ...
How to execute IN() SQL queries with Spring's JDBCTemplate effectivly?
...n.
– Timofey Gorshkov
Jan 18 '12 at 20:36
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