Switch and label block (Supporters 2:2:2 for switch 2:1:1 for label)

Scratcher1002

I think that these should be some blocks:

switch (variable :: variable) :: control cstart
case (1) :: control cstart
do something
 :: cend
case (2) :: control cstart
do something
end
etc :: custom cap

label [label v] :: control
go to [label v] :: control

These ideas came from several scripting languages. (Batch (label block) and Javascript (switch block))

Yes, I know other people have submitted both of these.

Supporters:

Idea 1 :: custom cstart
Scratcher1002 (duh :: operators) :: operators
end
Idea 2 :: custom cstart
Scratcher1002 (duh :: operators) :: operators
end

You want an explaination?

switch block :: operators hat

So this:

switch (var) case (1 v) ::control cstart

case (2 v)(-::control) ::control celse

case (3 v)(-::control) ::control celse

case (default v)(-::control) ::control celse

(+ ::control) ::cend// This was made by DaSpudLord

Is:

if <(var) = [1]> then
    do something
else
if <(var) = [2]> then
do something
else
do something else
end

Label block :: operators hat

label [hello v] :: control
go to [hello v] :: control

Label works like this:

In Batch script, labels are defined like this:

:*whatever the label is called*

So, this might be a program:

:a
echo Say this.
cls
:b
goto :a

The program above will go through until the end of the program or you close the window.

LABELS WILL BE IGNORED UNLESS A GOTO SCRIPT IS PLACED then it will go to that label, and anything after the label. Now do you get it?
Good.

Last edited by Scratcher1002 (Sept. 11, 2015 03:03:01)

wayyyy

I'm sorry, I don't know what these blocks do.

CatsUnited

Semi-support, but the switch statement would have to be renamed.

DaSpudLord

wayyyy wrote:
I'm sorry, I don't know what these blocks do.

scrooge200

DaSpudLord wrote:
wayyyy wrote:
I'm sorry, I don't know what these blocks do.

Scratcher1002

OK, so, switch block.

Javascript uses the block like this:

Basically alot of ifs strung together but a more cleaned up version.

label:
So, you can do this script again if you want to.

Basically both of them clean up scripts.

@CatsUnited What would it be named? The “bunch of ifs” block?

Last edited by Scratcher1002 (Sept. 8, 2015 02:35:50)

DaSpudLord

Scratcher1002 wrote:
OK, so, switch block.

Javascript uses the block like this:

Basically alot of ifs strung together but a more cleaned up version.

label:
So, you can do this script again if you want to.

Basically both of them clean up scripts.

@CatsUnited What would it be named? The “bunch of ifs” block?

I still don't understand…

Can someone else explain it?

scratchinghead

DaSpudLord wrote:
Scratcher1002 wrote:
OK, so, switch block.

Javascript uses the block like this:

Basically alot of ifs strung together but a more cleaned up version.

label:
So, you can do this script again if you want to.

Basically both of them clean up scripts.

@CatsUnited What would it be named? The “bunch of ifs” block?
I still don't understand…

Can someone else explain it?

Shock4

I think they should have a audio sensing block (for example)

when green flag clicked
forever
    
change x by <audio loudness>
end

Last edited by Shock4 (Sept. 8, 2015 17:38:53)

ev3coolexit987654

No support for both.

Botcho_Otkho

Scratcher1002 wrote:
I think that these should be some blocks:
switch (variable :: variable) :: control cstart
case (1) :: control cstart
do something
 :: cend
case (2) :: control cstart
do something
end
etc :: custom cap
label [label v] :: control
go to [label v] :: control
These ideas came from several scripting languages. (Batch (label block) and Javascript (switch block))

Yes, I know other people have submitted both of these.

Supporters:
Idea 1 :: custom cstart
Scratcher1002 (duh :: operators) :: operators
end
Idea 2 :: custom cstart
Scratcher1002 (duh :: operators) :: operators
end

DaSpudLord

DaSpudLord wrote:
I still don't understand…

Can someone else explain it?

Gaza101

Here's an example of the switch statement: the following…

set [n v] to [3]
if <(n) = [1]> then
    say [n is one!] for (2) secs
else
    if <(n) = [2]> then
        say [n is two!] for (2) secs
    else
        if <(n) = [3]> then
            say [n is three!] for (2) secs
        else
            say [n is something else!] for (2) secs
        end
    end
end

…is the same as…

switch (3) :: control cstart
    case (1 v) :: control cstart
        say [n is one!] for (2) secs
    end
    case (2 v) :: control cstart
        say [n is two!] for (2) secs
    end
    case (3 v) :: control cstart
        say [n is three!] for (2) secs
    end
    case (default v) :: control cstart
        say [n is something else!] for (2) secs
    end
end

Semi-support for switch. No support for goto (it's messy).

DaSpudLord

@Gaza101, thanks for the explanation! I've used that block in the Mindstorms EV3 program, so now I know how it works. Anyway, no support because it's workaroundable and can be confusing. But, if it were to be implemented, it should look something like this (except the words should probably be changed so it's less confusing)-

switch (3) case (1 v)::control cstart

case (2 v)(-::control)::control celse

case (3 v)(-::control)::control celse

case (else v)(-::control)::control celse

(+::control)::cend//There should be a plus sign there, don't know why it won't show up...

The plus and minus buttons would be used to add and remove cases. The reason for this and not your suggestion is because what if I did this-

...
if <> then
case (2 v)::control cstart
...
end
end

Last edited by DaSpudLord (Sept. 8, 2015 21:20:14)

thebriculator

Support Both. I know Java and C++ among others and the switch:case block is really useful. Also I've actually been in situations where the goto label block would be handy

Scratcher1002

Gaza101 wrote:

Here's an example of the switch statement: the following…

set [n v] to [3]
if <(n) = [1]> then
    say [n is one!] for (2) secs
else
    if <(n) = [2]> then
        say [n is two!] for (2) secs
    else
        if <(n) = [3]> then
            say [n is three!] for (2) secs
        else
            say [n is something else!] for (2) secs
        end
    end
end

…is the same as…

switch (3) :: control cstart
    case (1 v) :: control cstart
        say [n is one!] for (2) secs
    end
    case (2 v) :: control cstart
        say [n is two!] for (2) secs
    end
    case (3 v) :: control cstart
        say [n is three!] for (2) secs
    end
    case (default v) :: control cstart
        say [n is something else!] for (2) secs
    end
end

Semi-support for switch. No support for goto (it's messy).

Almost yes, it's:

switch (n) :: control cstart
    case (1 v) :: control cstart
        say [n is one!] for (2) secs
    end
    case (2 v) :: control cstart
        say [n is two!] for (2) secs
    end
    case (3 v) :: control cstart
        say [n is three!] for (2) secs
    end
    case (default v) :: control cstart
        say [n is something else!] for (2) secs
    end
end

And why is the goto block messy?
Yes, I know they are workaroundable.. BUT. Ever been in a situation where there is 100 different possible outcomes? Or when you don't want to repeat a block string again.. And again, and again… etc.

DaSpudLord

What do the label blocks do?

Scratcher1002

DaSpudLord wrote:
What do the label blocks do?

The label blocks do this:

Essentially it can be used as a forever block like this:

label [hello world v] :: control
do something
goto [hello world v] :: control

The label block basically cleans up scripts a little bit. The goto label block makes it so it goes to that label and does whatever is after the block until another label. AND in Batch script, if you DON'T put a goto label code, it will go on and on until the end of the program or a goto label block is put on DESPITE other label blocks.

DaSpudLord

No support for labels- first off, easily workaroundable with loop blocks.

Also, like the switch block, it could confuse inexperienced Scratchers.

And, what would happen if I had multiple label blocks?

Scratcher1002

DaSpudLord wrote:
No support for labels- first off, easily workaroundable with loop blocks.

Also, like the switch block, it could confuse inexperienced Scratchers.

And, what would happen if I had multiple label blocks?

Multiple labels in a row? Simple, if there is no stop this script or goto label block, it keeps going. Like I said in my post:

Scratcher1002 wrote:
[in Batch script, if you DON'T put a goto label code, it will go on and on until the end of the program or a goto label block is put on DESPITE other label blocks.

And yes, I know that they are both workaroundable. I understand it might be confusing for newer Scratchers.. But, that's what the tutorials are for, same with the Help With Scripts section of the forum.

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