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Change the name of a key in dictionary
...teps:
dictionary[new_key] = dictionary[old_key]
del dictionary[old_key]
Or in 1 step:
dictionary[new_key] = dictionary.pop(old_key)
which will raise KeyError if dictionary[old_key] is undefined. Note that this will delete dictionary[old_key].
>>> dictionary = { 1: 'one', 2:'two', 3:'...
When using Spring Security, what is the proper way to obtain current username (i.e. SecurityContext)
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A lot has changed in the Spring world since this question was answered. Spring has simplified getting the current user in a controller. For other beans, Spring has adopted the suggestions of the author and simplified the injection of 'SecurityContextHolder'....
Building big, immutable objects without using constructors having long parameter lists
I have some big (more than 3 fields) objects that can and should be immutable. Every time I run into that case I tend to create constructor abominations with long parameter lists.
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What's the difference between git clone --mirror and git clone --bare
The git clone help page has this to say about --mirror :
7 Answers
7
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What's the difference between ContentControl and ContentPresenter?
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ContentControl is a base class for controls that contain other elements and have a Content-property (for example, Button).
ContentPresenter is used inside control templates to display content.
ContentControl, when used directly (it's supposed to be used a...
Bash: Syntax error: redirection unexpected
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Does your script reference /bin/bash or /bin/sh in its hash bang line? The default system shell in Ubuntu is dash, not bash, so if you have #!/bin/sh then your script will be using a different shell than you expect. Dash does not have the <<< redirectio...
How can I get useful error messages in PHP?
...en I will try and run a PHP script and just get a blank screen back. No error message; just an empty screen. The cause might have been a simple syntax error (wrong bracket, missing semicolon), or a failed function call, or something else entirely.
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How do I change the figure size with subplots?
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This doesn't work, you can set the height to whatever you want , but it will never be larger than your monitor.
– user3417220
Jul 7 '17 at 16:29
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Declare and Initialize String Array in VBA
This should work according to another stack overflow post but its not:
6 Answers
6
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What is meant by Scala's path-dependent types?
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My favorite example:
case class Board(length: Int, height: Int) {
case class Coordinate(x: Int, y: Int) {
require(0 <= x && x < length && 0 <= y && y < height)
}
val occupied = scala...