conditionals and strings
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Indeed, for some obscure reason TI decided that "+" would be a good concatenation character, even though it eliminates the possibility of deriving ascii values from characters.
But "1->sub(Str1,4,1 would probably cause problems when it is put on a two-byte token or vice versa with "[A]->sub(Str1,4,1
Maybe TI didn't want to deal with that...
Gah... More string problems... I need to check if Str1 was made from within my program (or just in the correct format). When I try...

Code:
:If length(Str1)>=10

...it says "ERR: UNDEFINED" if Str1 isn't there.
Is there anyway to check if Str1 exists?


Not without an asm program, unfortunately.
No, the only thing you can do is add some text and a yes no option to let the user that that string will be overwritten...
Oh, okay. Thanks, guys.


If you want to save a string for the next time you run your program, convert it to a list. This topic has some ways to do that.
foamy3 wrote:
Gah... More string problems... I need to check if Str1 was made from within my program (or just in the correct format). When I try...

Code:
:If length(Str1)>=10

...it says "ERR: UNDEFINED" if Str1 isn't there.
Is there anyway to check if Str1 exists?
And by the way:

Code:
If 11>length(Str1
See, one byte less, and quite a bit faster since you're only doing a <, not >=.
Actually, that would be:

Code:

:If 9<length(Str1
calc84maniac wrote:
Actually, that would be:

Code:

:If 9<length(Str1
OH yeah, I was thinking that he wanted to know if the string was at most 10 characters, not at least 10 characters. My bad.
  
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conditionals and strings
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