[Implemented] break and continue

[matthew180]

Greetings,

I'd love to have break and continue added to PB, after the new variable types of course!

Anyone else miss having break and continue?

Matthew

[Karbon]

*raises hand*

I do

[GPI]

Have you see the "onError"-Library?

Or what do you mean

Look also for "callDebugger"

GPI

[Fenix]

@GPI: I think he´s talking about select/case...



Fenix

[Kale]

@GPI: I think he´s talking about select/case...

Yes, and in (for/while) loops

[matthew180]

Yes, 'break' and 'continue' in reference to looping control structures, for example:

The 'break' statement terminates the execution of the nearest enclosing loop or conditional statement in which it appears. Control passes to the statement that follows the terminated statement, if any.

Code: Select all

  for i = 1 to 100
    if somecondition(i) = 1
      break
    endif
  next

In this example, lets say I want to know what the value that 'i' was when the condition became true, and at that point I also want to terminate the loop. Currently to achieve this you have to do something like this:

Code: Select all

  for i = 1 to 100
    if somecondition(i) = 1
      i_val = i
      i = 100
    endif
  next

The 'continue' statement passes control to the next iteration of the repeat, for, or while statement in which it appears, bypassing any remaining statements in the repeat, for, or while statement body. A typical use of the 'continue' statement is to return to the start of a loop from within a deeply nested loop.

Code: Select all

while i > 0
  i - 1
  x = f( i )
  if x = 1
    continue
  y + x * x
wend

Also, in other languages (C, PHP, etc.) each 'case' section of a 'select' (called 'switch' in other languages) statement has to include a 'break', otherwise, without a break statement, every statement from the matched case label to the end of the 'select', including the default, is executed.

PHP also extends the 'break' statement by allowing a number to follow the 'break' to indicate how many levels of control structures to break from. This is *very* nice to have.

Matthew

[geoff]

mathew180 said:

Greetings,
I'd love to have break and continue added to PB, after the new variable types of course!

Break, continue, double variables and other things have been promised for later versions of PB.

Fred, please can you give us some idea when, so we can make plans.

[Fred]

I don't have a deadline for now, but probably before the end of the year.

[Rings]

I don't have a deadline for now, but probably before the end of the year.

pressure, pressure, pressure

[geoff]

Fred, thanks for your timescale, seems reasonable to me.

For your information this is my personal prioritised wish list:
1) Doubles
2) Set JPG save quality
3) Mod function
4) Break keyword in loops

Geoff

[kwag]

Fred, thanks for your timescale, seems reasonable to me.

For your information this is my personal prioritised wish list:
1) Doubles
2) Set JPG save quality
3) Mod function
4) Break keyword in loops

Geoff

Move that "4)" to the top, and also add "continue", together with "break"
We need exit conditions badly

-Karl