Questions tagged [switch-statement]
In computer programming, a switch, case, select or inspect statement is a type of selection control mechanism used to invoke specific blocks of code based on variable contents.
switch-statement
11,811
questions
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votes
12
answers
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using the 'is' keyword in a switch in c#
I'm currently adding some new extended classes to this code:
foreach (BaseType b in CollectionOfExtendedTypes) {
if (b is ExtendedType1) {
((ExtendedType1) b).foo = this;
}
else if (b is ...
- 679
155
votes
7
answers
79k
views
Variable declaration in a C# switch statement [duplicate]
Why is it that in a C# switch statement, for a variable used in multiple cases, you only declare it in the first case?
For example, the following throws the error "A local variable named 'variable' ...
- 9,153
264
votes
12
answers
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views
How to use a switch case 'or' in PHP
Is there a way of using an 'OR' operator or equivalent in a PHP switch?
For example, something like this:
switch ($value) {
case 1 || 2:
echo 'the value is either 1 or 2';
break;...
alex
180
votes
14
answers
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views
SQL Switch/Case in 'where' clause
I tried searching around, but I couldn't find anything that would help me out.
I'm trying to do this in SQL:
declare @locationType varchar(50);
declare @locationID int;
SELECT column1, column2
FROM ...
- 5,726
22
votes
4
answers
32k
views
Good way to do a "switch" in a Makefile
I'm experimenting with an updated build system at work; currently, I'm trying to find a good way to set compiler & flags depending on the target platform.
What I would like to do is something ...
- 12.8k
14
votes
3
answers
54k
views
switch case vs if else [duplicate]
I was wondering if there was any difference in the way the following code was compiled into assembly. I've heard that switch-case is more efficient than if else, but in this example I am not quite ...
- 10.2k
179
votes
12
answers
245k
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Switch statement fall-through...should it be allowed? [closed]
For as long as I can remember I have avoided using switch statement fall-through. Actually, I can't remember it ever entering my consciousness as a possible way to do things as it was drilled into my ...
- 11.6k
3
votes
7
answers
871
views
Tree Algorithm
I was thinking earlier today about an idea for a small game and stumbled upon how to implement it. The idea is that the player can make a series of moves that cause a little effect, but if done in a ...
- 2,911
423
votes
14
answers
238k
views
Switch statement fallthrough in C#?
Switch statement fallthrough is one of my personal major reasons for loving switch vs. if/else if constructs. An example is in order here:
static string NumberToWords(int number)
{
string[] ...
- 131k
12
votes
5
answers
7k
views
Eclipse for IntelliJ Idea Users [closed]
I have a coworker who is looking to switch from InteilliJ Idea to Eclipse, and is concerned about not knowing the Eclipse set of commands.
I was wondering - would anyone have a link to keyboard ...
- 2,698
160
votes
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answers
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Is there any benefit to this switch / pattern matching idea?
I've been looking at F# recently, and while I'm not likely to leap the fence any time soon, it definitely highlights some areas where C# (or library support) could make life easier.
In particular, I'...
- 1.1m
2
votes
1
answer
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error when switching to different svn branch
I've got two SVN branches (eg development and stable) and want to switch from one to another...
In every tutorial there is command like:
rootOfLocalSvnCopy:>svn switch urlToNewBranch .
But it ...
- 2,021
14
votes
14
answers
31k
views
Objective-C switch using objects?
I'm doing some Objective-C programming that involves parsing an NSXmlDocument and populating an objects properties from the result.
First version looked like this:
if([elementName compare:@"...
- 16.9k
190
votes
23
answers
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views
Advantage of switch over if-else statement
What's the best practice for using a switch statement vs using an if statement for 30 unsigned enumerations where about 10 have an expected action (that presently is the same action). Performance and ...
- 2,147
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votes
23
answers
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Why can't variables be declared in a switch statement?
I've always wondered this - why can't you declare variables after a case label in a switch statement? In C++ you can declare variables pretty much anywhere (and declaring them close to first use is ...
- 77.9k