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“is” operator behaves unexpectedly with integers
Why does the following behave unexpectedly in Python?
11 Answers
11
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Java: What is the difference between and ?
I am unable to understand the following text... Does it mean that <clinit> is for empty constructors? Why is important to have two different versions?
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Mockito: Trying to spy on method is calling the original method
...bjects!
Sometimes it's impossible to use when(Object) for stubbing spies. Example:
List list = new LinkedList();
List spy = spy(list);
// Impossible: real method is called so spy.get(0) throws IndexOutOfBoundsException (the list is yet empty)
when(spy.get(0)).thenReturn("foo");
// You have to use ...
How to initialize/instantiate a custom UIView class with a XIB file in Swift
...yClass which is a subclass of UIView , that I want to initialize with a XIB file. I am not sure how to initialize this class with the xib file called View.xib
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CSS Image size, how to fill, not stretch?
I have an image, and I want to set it a specific width and height (in pixels)
15 Answers
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Rails - controller action name to string
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Rails 2.X: @controller.action_name
Rails 3.1.X: controller.action_name, action_name
Rails 4.X: action_name
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inserting characters at the start and end of a string
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Strings are immutable so you can't insert characters into an existing string. You have to create a new string. You can use string concatenation to do what you want:
yourstring = "L" + yourstring + "LL"
Note that you can also create a string with n Ls by using multiplication:
m = 1
n...
Animate scrollTop not working in firefox
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Firefox places the overflow at the html level, unless specifically styled to behave differently.
To get it to work in Firefox, use
$('body,html').animate( ... );
Working example
The CSS solution would be to set the following s...
How to assign from a function which returns more than one value?
...Values()[[2]] would be sufficient.)
See the cited r-help thread for more examples.
(2) with If the intent is merely to combine the multiple values subsequently and the return values are named then a simple alternative is to use with :
myfun <- function() list(a = 1, b = 2)
list[a, b] <- m...
Reverse a string in Python
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How about:
>>> 'hello world'[::-1]
'dlrow olleh'
This is extended slice syntax. It works by doing [begin:end:step] - by leaving begin and end off and specifying a step of -1, it reverses a string.
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