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How to display pandas DataFrame of floats using a format string for columns?
I would like to display a pandas dataframe with a given format using print() and the IPython display() . For example:
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Using ViewPagerIndicator library with Android Studio and Gradle
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Thank you. I did not want to add some random maven repository to my build script. This much better.
– Greg Ennis
Mar 13 '15 at 21:21
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How to convert a string into double and vice versa?
I want to convert a string into a double and after doing some math on it, convert it back to a string.
12 Answers
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Check that an email address is valid on iOS [duplicate]
...@interface NSString (emailValidation)
- (BOOL)isValidEmail;
@end
Implement
@implementation NSString (emailValidation)
-(BOOL)isValidEmail
{
BOOL stricterFilter = NO; // Discussion http://blog.logichigh.com/2010/09/02/validating-an-e-mail-address/
NSString *stricterFilterString = @"^[A-Z0-9...
Format a datetime into a string with milliseconds
I want to have a datetime string from the date with milliseconds. This code is typical for me and I'm eager to learn how to shorten it.
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Why would you use an ivar?
...easily via the accessors.
Performance
Yes, this can make a difference in some cases. Some programs have constraints where they can not use any objc messaging in certain parts of the program (think realtime). In other cases, you may want to access it directly for speed. In other cases, it's because o...
TextView.setTextSize behaves abnormally - How to set text size of textview dynamically for different
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The difference here is that in the setTextSize(int size) method, the unit type by default is "sp" or "scaled pixels". This value will be a different pixel dimension for each screen density (ldpi, mdpi, hdpi).
getTextSize(), on the other hand, returns the actual pixel dimensions o...
Efficient way to remove keys with empty strings from a dict
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Python 2.X
dict((k, v) for k, v in metadata.iteritems() if v)
Python 2.7 - 3.X
{k: v for k, v in metadata.items() if v is not None}
Note that all of your keys have values. It's just that some of those values are the empty string. There's no such thing...
Converting stream of int's to char's in java
...enient to call read(char[], int, int) to read a whole block of text at a time. Don't forget to check the return value though, to see how many characters have been read.
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getting type T from IEnumerable
is there a way to retrieve type T from IEnumerable<T> through reflection?
13 Answers
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