if to case conversion

[Q695]

I'm stumped on how to convert the if statement to a case statement

if ($page>=3 && $page<4)

case (>='3' && <'4'):

It's doing the block inside when the case variable isn't set.

[Jessica]

Are you just trying to say 3, or is there a possibility that $page could be 3.5 or something?

[Irate]

Are you just trying to say 3, or is there a possibility that $page could be 3.5 or something?

 

lol

 

Eh... try using variable assignments within the if clause and then refer to the variable with the case statement?

 

Also, don't you use case statements only in switch statements? O_O

[Barand]

 

 

if ($page>=3 && $page<4)

 

converted to case statements becomes

switch ($page) {
    case 3:
        // do something
        break;
}

[Jessica]

lol

 

Eh... try using variable assignments within the if clause and then refer to the variable with the case statement?

 

Also, don't you use case statements only in switch statements? O_O

What exactly is so funny?

[Jessica]

converted to case statements becomes

switch ($page) {
    case 3:
        // do something
        break;
}

 

Which makes perfect sense - as long as he's really not expecting any other value other than 3. In which case why wasn't the original code if($page==3) instead of that weird greater than/less than combo?

[Barand]

There's no answer to that (perhaps it was generated by Dreamweaver) - we'll have to ask Q695

Edited May 13, 2013 by Barand

[Psycho]

If the name of the variable is any indication, I assume $page will be an integer or should at least be forced to be an integer. But, if the value really can be a range from 3 up to just less than 4, you can still use a switch. This is a "pro tip" that a colleague shared with me years ago regarding switch statements.

 

On each case statement within a switch you put the comparison for the switch value. If they are compared as equal (i.e. true) then the code for that case is executed. But, if you want to use a switch statement where each case comparison would be a range or possibly multiple comparisons, you can do it by using the switch in a non-intuitive way. Use the Boolean true as the switch value and the conditions as the case statements

 

switch(true)
{
    case ($page<1):
        //Perform some action for values 0.0 to 0.9...
        break;
    case ($page>=1 && $page<2):
        //Perform some action for values 1.0 to 1.9...
        break;
    case ($page>=2 && $page<3):
        //Perform some action for values 2.0 to 2.9...
        break;
    case ($page>=3 && $page<4):
        //Perform some action for values 3.0 to 3.9...
        break;
    default:
        //Perform some action for values over 4
        break;
}

 

This comes in very handy when you have a fixed set of results that are dependent upon multiple conditions as opposed to using a lot of nested if/else statements.

Edited May 13, 2013 by Psycho

[Q695]

Yes, page will be a rational number, and doing an include within an include, like 3.1, and 3.2 would be elements of 3.

 

I was trying both ways, and displaying the code for the types of things I tried.

 

It's still in the range.

Edited May 14, 2013 by Q695

[Jessica]

HA! MY QUESTION WAS VALID.

[Q695]

I know it was, so I was saying that the number could be a rational number also.