Scratch

Both those scripts do the same thing. Joining a variable value with nothing isn't going to change it.

TargetheroTest wrote:

Both those scripts do the same thing. Joining a variable value with nothing isn't going to change it.

Au contraire, joining the (x position) reporter, for example, with nothing like so:

set x to (10.1)
forever
set [xposition v] to (join (x position) [])
end

will cause the watcher for x position to show 10.1 and the watcher for the xposition variable to show 10.09999999999991.

Effectively, using a blanked join block stops Scratch rounding values, this can be very useful.

However, costumes will switch to the number if you ask it to switch to a number and to the name if you send it a string. This can be easily controlled by not using integers in costume names.

TargetheroTest wrote:

Both those scripts do the same thing. Joining a variable value with nothing isn't going to change it.

Afraid I must disagree.
Joining a variable value with nothing will turn the input into a string. Using the string it will switch to the costume name. However if it's a number, it will switch to the costume number.

Targethero wrote:

sparks wrote:

TargetheroTest wrote:

Both those scripts do the same thing. Joining a variable value with nothing isn't going to change it.

Au contraire, joining the (x position) reporter, for example, with nothing like so:

set x to (10.1)
forever
set [xposition v] to (join (x position) [])
end

will cause the watcher for x position to show 10.1 and the watcher for the xposition variable to show 10.09999999999991.

That wont have any effect on a variable(in place of the x reporter). They aren't auto-rounded, 10.1 will still be exactly 10.1, variables will always be exactly what you set them to, so using a blank join block wont change anything.

Build that script. The variable reporter shows 10.09999999999991. I didn't just make that up, I tested it first 

To clear this up, I have created a project showing this download

this project has 11 costumes, costume 2 is named 11.

there are two block sets in the project.

 switch to costume ((11) + (0))

will switch to costume 11 whilst

 switch to costume (join [11] []) 

switches to costume 2

Last edited by sparks (2012-02-10 17:04:35)

Oh I see what you're on about. I also just tried out the scripts in the first post and they are wrong as variables are strings to begin with. In fact, it switches to the name as default with a variable unless you put the variable in a (var) + ( )) situation, turning it into a number.

Last edited by sparks (2012-02-10 17:26:27)

Targethero wrote:

Exactly.

sparks wrote:

TargetheroTest wrote:

Both those scripts do the same thing. Joining a variable value with nothing isn't going to change it.

Au contraire, joining the (x position) reporter, for example, with nothing like so:

set x to (10.1)
forever
set [xposition v] to (join (x position) [])
end

will cause the watcher for x position to show 10.1 and the watcher for the xposition variable to show 10.09999999999991.

Effectively, using a blanked join block stops Scratch rounding values, this can be very useful.

This is because sometimes scratch cannot display a sprite at an exact position so it slightly alters the position but auto-rounds it for display (although retains the value for processing). Adding a space character to the number turns it into a string so it stops auto-rounding.