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How to show line number when executing bash script
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157
You mention that you're already using -x. The variable PS4 denotes the value is the prompt pri...
Can I create more than one repository for github pages?
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159
You can have one site published to https://<username>.github.io by publishing to the mast...
background function in Python
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Acumenus
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answered Aug 23 '11 at 23:14
TorelTwiddlerTo...
type object 'datetime.datetime' has no attribute 'datetime'
...python2.6/lib-dynload/datetime.so'>
>>> datetime.datetime(2001,5,1)
datetime.datetime(2001, 5, 1, 0, 0)
But, if you import datetime.datetime:
>>> from datetime import datetime
>>> datetime
<type 'datetime.datetime'>
>>> datetime.datetime(2001,5,1) # Yo...
Embedding SVG into ReactJS
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Update 2016-05-27
As of React v15, support for SVG in React is (close to?) 100% parity with current browser support for SVG (source). You just need to apply some syntax transformations to make it JSX compatible, like you already have to ...
Select random lines from a file
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656
Use shuf with the -n option as shown below, to get N random lines:
shuf -n N input > output...
what is the difference between a portlet and a servlet?
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5 Answers
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dplyr summarise: Equivalent of “.drop=FALSE” to keep groups with zero length in output
...drop=FALSE) %>% tally
#> Species n
#> 1 setosa 50
#> 2 versicolor 50
#> 3 virginica 50
#> 4 empty_level 0
# Add character column
iris$group2 = c(rep(c("A","B"), 50), rep(c("B","C"), each=25))
# Empty groups involving combinations of Species and gro...
Left-pad printf with spaces
...lowing.
char *ptr = "Hello";
printf("%40s\n", ptr);
That will give you 35 spaces, then the word "Hello". This is how you format stuff when you know how wide you want the column, but the data changes (well, it's one way you can do it).
If you know you want exactly 40 spaces then some text, just ...