Undocumented Tricks in Basic

[nitacku]

hmm, that seems sort of like object oriented programing
I'm sure there's some really great uses for this (I'm thinking of a use right now :biggrin: )

[echidna]

It's better not to have code in string, this is a bad way of programming

[simplethinker]

Another way to do it if you have only one chunk of code is to type it in on the homescreen and just recall entry (so you only hit 2nd->enter instead of 2nd->recall->something)

[DarkerLine]

[Harrierfalcon]

[BatBlaster]

I'm writing a program.
A trivia game.

[luby]

http://tibasicdev.wikidot.com/undocumented...tricks-and-tips

Enjoy and Update!

[bananaman]

Wait a second. If you just documented them, you can't call them undocumented.

Anyways, that must have taken awhile to go through and compile them all, thank you for that time.

[alexrudd]

DarkerLine and I mostly wikified it. The style, however...

This page should eventually be deleted, and the content spread out to other pages. Some of it already is, and is redundant. Thanks for adding it anyway, though; that's how a wiki works.

[spandiv]

The undocumented tips and tricks page looks nice, but all of its content is already available on the tips & tricks page

[Harrierfalcon]

Fixed a spelling error (never heard of "pgrm" ), added something on Hard-Coded sprites to Graphics, and clarified the copy-and-paste, as well as the string-to-list thing.

I feel terrible, I haven't really done anything for this site... And the only thing that comforts me is that there's not much I can add. I think that's a good thing.

[luby]

I did that so we can have one compiled list with in grasp.

[Harrierfalcon]

But you still typed up the word document...how can you cheat off of yourself?

[DarkerLine]

A new final word in If vs. If-Then:

If is not actually slower than If-Then, as we've concluded previously. The reason for the difference in timings was that If with a false condition becomes far slower inside a For( loop without a closed parenthesis.

There is indeed a striking difference between these two situations

For(I,1,2000
If 0:
End

vs.

For(I,1,2000
If 0:Then
End
End

The first piece of code is something like 20 times slower, I believe? However, if you add the ) to the end of the For( command, the two situations equal out -- then, the first is actually slightly faster.

I would appreciate it if someone with a different OS version or a different calculator model (I have a TI-83+ with OS v1.15) tested this too.

[luby]

84+SE ROM 2.41

For(I,1,2000
If 0:
End
153 seconds
vs.

For(I,1,2000
If 0:Then
End
End
7 seconds


For(I,1,2000)
If 0:
End
7 seconds
vs.

For(I,1,2000)
If 0:Then
End
End
6 seconds


Final conclusion: I'd say If: is only slightly slower.

[DarkerLine]

Well, while this doesn't provide the evidence for all the calcs, it should be a pretty good range (more or less oldest to newest of what anyone's actually using). I suppose I'll get some accurate timings and update the relevant TIBD pages.

[Super Speler]

:VALUEidentity(DIMENSION
:cumSum(Ans)T-Ans+cumSum(Ans

This creates a matrix of dimensions DIMENSION by DIMENSION full of VALUE at a relatively fast speed without using any variables.

Correct me if there's a better way to do this; I only recently got back into using Basic for actual code as opposed to writing games :/.

[Xphoenix]

{rows,columns→dim(matrixname
Fill(value,matrixname

This allows rectangular matrices, and I think this is faster.

:VALUEidentity(DIMENSION
:cumSum(Ans)T-Ans+cumSum(Ans
The bolded T is the transpose command, right?

[Super Speler]

Yeah, but the point was that mine used no Matrix (or any) variables.

[Xphoenix]

Sorry, missed that part. >_<