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Replacement for “rename” in dplyr
...umn names. This example replaces spaces and periods with an underscore and converts everything to lower case:
iris %>%
select_all(~gsub("\\s+|\\.", "_", .)) %>%
select_all(tolower) %>%
head(2)
sepal_length sepal_width petal_length petal_width species
1 5.1 3.5 ...
Zipping streams using JDK8 with lambda (java.util.stream.Streams.zip)
...iterator();
// Zipping looses DISTINCT and SORTED characteristics
int characteristics = aSpliterator.characteristics() & bSpliterator.characteristics() &
~(Spliterator.DISTINCT | Spliterator.SORTED);
long zipSize = ((characteristics & Spliterator.SIZED) != 0)
...
What is the Swift equivalent of respondsToSelector?
... func work() { }
func eat(food: AnyObject) { }
func sleep(hours: Int, minutes: Int) { }
}
let worker = Worker()
let canWork = worker.respondsToSelector(Selector("work")) // true
let canEat = worker.respondsToSelector(Selector("eat:")) // true
let canSleep = worker.respondsToSelector...
How do I compare two strings in Perl?
...o be different. How hard is that?! Being a numeric comparison operator, != converts both its operands to numbers perl -E 'say "equal" if not "a" != "b"'.
– Sinan Ünür
Jan 24 '15 at 17:36
...
How to compare types
...ue is a string and you can do your work here
}
this has the advantage to convert value only once into the specified type.
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How to write LaTeX in IPython Notebook?
...:
from IPython.display import display, Math, Latex
display(Math(r'F(k) = \int_{-\infty}^{\infty} f(x) e^{2\pi i k} dx'))
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2D cross-platform game engine for Android and iOS? [closed]
...e engine few days ago. It uses C# and have Windows Phone and Windows Store converters as well which makes it a great replacement of XNA for me
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How to generate a number of most distinctive colors in R?
...
Is there a possibility to convert the hex codes in col to corresponding color names?
– Prradep
Jul 13 '17 at 13:50
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How to open standard Google Map application from my application?
...passing label to google maps with latitude and longitude , map application converts the label into the addresses. Can you please tell that how to solve this problem?
– Rohan Sharma
Mar 9 '18 at 18:54
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Using ZXing to create an Android barcode scanning app [duplicate]
...t provides a standalone barcode reader application which — via Android's intent mechanism — can be called by other applications who wish to integrate barcode scanning.
The easiest way to do this is to call the ZXing SCAN Intent from your application, like this:
public Button.OnClickListener mS...