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Remove all special characters from a string in R?
...You need to use regular expressions to identify the unwanted characters. For the most easily readable code, you want the str_replace_all from the stringr package, though gsub from base R works just as well.
The exact regular expression depends upon what you are trying to do. You could just remove...
How to condense if/else into one line in Python? [duplicate]
...ss an if / else statement to one line in Python?
I oftentimes see all sorts of shortcuts and suspect it can apply here too.
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Where can I find Android's default icons? [duplicate]
Where can I find the name of the default Android menu icons (like refresh or compose)?
3 Answers
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How to add hours to current time in python
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from datetime import datetime, timedelta
nine_hours_from_now = datetime.now() + timedelta(hours=9)
#datetime.datetime(2012, 12, 3, 23, 24, 31, 774118)
And then use string formatting to get the relevant pieces:
>>> '{:%H:%M:%S}'.f...
What is &&& operation in C
... second part being redundant, since &i will never evaluate to false.
For a user-defined type, where you can actually overload unary operator &, it might be different, but it's still a very bad idea.
If you turn on warnings, you'll get something like:
warning: the address of ‘i’ wil...
Strange behavior for Map, parseInt [duplicate]
I saw this example of strange JavaScript behavior on twitter
3 Answers
3
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Are complex expressions possible in ng-hide / ng-show?
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Use a controller method if you need to run arbitrary JavaScript code, or you could define a filter that returned true or false.
I just tested (should have done that first), and something like ng-show="!a && b" worked as expected.
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How to grep a string in a directory and all its subdirectories? [duplicate]
How to grep a string or a text in a directory and all its subdirectories'files in LINUX ??
2 Answers
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What is this smiley-with-beard expression: “”?
I came across the following program, which compiles without errors or even warnings:
4 Answers
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print memory address of Python variable [duplicate]
How do I print the memory address of a variable in Python 2.7?
I know id() returns the 'id' of a variable or object, but this doesn't return the expected 0x3357e182 style I was expecting to see for a memory address.
I want to do something like print &x , where x is a C++ int variable for exam...