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Does it make any sense to use inline keyword with templates?
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Tricks to manage the available memory in an R session
...kage. With its := operator you can :
Add columns by reference
Modify subsets of existing columns by reference, and by group by reference
Delete columns by reference
None of these operations copy the (potentially large) data.table at all, not even once.
Aggregation is also particularly fast be...
\r\n, \r and \n what is the difference between them? [duplicate]
I need to ask about the difference in a string between \r\n , \r and \n . How is a string affected by each?
4 Answers
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Suppressing deprecated warnings in Xcode
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Try -Wno-deprecated-declarations, or its corresponding setting in Xcode, GCC_WARN_ABOUT_DEPRECATED_FUNCTIONS (pro tip: just type in "deprecated" in the build settings to find the specific setting for this warning).
Current versions of Xcode (e.g. Xcode 9.2):
Ancient version...
How to match “any character” in regular expression?
...ncode this is with a character class whose members form a partition of the set of all possible characters.
Usually people write that as [\s\S] (whitespace or non-whitespace), though [\w\W], [\d\D], etc. would all work.
shar...
Display Animated GIF
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@Bicou On post-HC devices you should setLayerType(LAYER_TYPE_SOFTWARE) on your View. But it still only works for some gifs and for some devices.
– Michał K
Jun 16 '13 at 12:35
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Pandas dataframe get first row of each group
...ourth
If you need id as column:
>>> df.groupby('id').first().reset_index()
id value
0 1 first
1 2 first
2 3 first
3 4 second
4 5 first
5 6 first
6 7 fourth
To get n first records, you can use head():
>>> df.groupby('id').head(2).reset_index(drop...
How can I efficiently download a large file using Go?
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How do I scroll the UIScrollView when the keyboard appears?
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The recommended way from Apple is to change the contentInset of the UIScrollView. It is a very elegant solution, because you do not have to mess with the contentSize.
Following code is copied from the Keyboard Programming Guide, where the handling of this issue is explained. You s...
Difference between single and double quotes in Bash
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@ekiim That exact text is set (unchanged) into PS1. Try echo $PS1 to see what I mean. But PS1 is evaluated before being displayed (see the PROMPTING section in the bash manpage). To test this out, try PS1='$X'. You will have no prompt. Then run X=foo ...