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Get position of UIView in respect to its superview's superview
...c to the button in the hierarchy as asked I found this easier to visualize and understand:
From here: original source
ObjC:
CGPoint point = [subview1 convertPoint:subview2.frame.origin toView:viewController.view];
Swift:
let point = subview1.convert(subview2.frame.origin, to: viewControll.v...
Pandas get topmost n records within each group
Suppose I have pandas DataFrame like this:
3 Answers
3
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Is it possible to set a number to NaN or infinity?
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On python >= 2.6, you can just use math.isnan() and math.isinf()
– Agos
May 9 '11 at 10:21
10
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What is offsetHeight, clientHeight, scrollHeight?
...f explaining what is the difference between offsetHeight , clientHeight and scrollHeight or offsetWidth , clientWidth and scrollWidth ?
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Why can't enum's constructor access static fields?
Why can't enum's constructor access static fields and methods? This is perfectly valid with a class, but is not allowed with an enum.
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.gitignore exclude files in directory but not certain directories
... following contents:
*
!.gitignore
Then, you can add those directories, and only the .gitignore file in each directory will get added -- but this means the directories will now be tracked (i.e., created when cloning).
sha...
Set value to null in WPF binding
...le:
<TextBox Text="{Binding Price, TargetNullValue=''}"/>
Which stands for (thanks Gregor for your comment):
<TextBox Text="{Binding Price, TargetNullValue={x:Static sys:String.Empty}}"/>
sys is the imported xml namespace for System in mscorlib:
xmlns:sys="clr-namespace:System;ass...
Converting a double to an int in C#
...le numbers, the even number is returned;
that is, 4.5 is converted to 4, and 5.5 is converted to 6.
...while the cast truncates:
When you convert from a double or float value to an integral type, the
value is truncated.
Update: See Jeppe Stig Nielsen's comment below for additional differ...
Android TextWatcher.afterTextChanged vs TextWatcher.onTextChanged
...t circumstances should I use afterTextChanged instead of onTextChanged and vice versa?
3 Answers
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PostgreSQL wildcard LIKE for any of a list of words
...o you know it ? most of documentation I've read says that regex are slower and a LIKE %...
– DestyNova
Jul 24 '15 at 14:26
5
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