Undocumented Tricks in Basic
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Undocumented Tricks in Basic
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DarkerLine
ceci n'est pas une |


Super Elite (Last Title)


Joined: 04 Nov 2003
Posts: 8328
Posted: 26 Nov 2003 02:33:21 pm    Post subject:
why would you worry about saving a few bytes if you lose a lot more by putting comments in?
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DarkerLine
ceci n'est pas une |


Super Elite (Last Title)


Joined: 04 Nov 2003
Posts: 8328
Posted: 27 Nov 2003 03:08:02 pm    Post subject:

Code:
Goto 1
comment
Lbl 1


takes up a few bytes more than


Code:
"comment
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Adm.Wiggin
aka Tianon


Know-It-All


Joined: 02 Jun 2003
Posts: 1874
Posted: 27 Nov 2003 11:40:50 pm    Post subject:
the first was only if Ans is needed preserved. the second works fine if no Ans is used for input or anything...
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DarkerLine
ceci n'est pas une |


Super Elite (Last Title)


Joined: 04 Nov 2003
Posts: 8328
Posted: 28 Nov 2003 03:03:29 pm    Post subject:
In that case,

Code:
If 0:comment

is probably the best.
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Babyboy


Advanced Member


Joined: 11 Jun 2003
Posts: 499
Posted: 30 Jan 2004 09:28:18 pm    Post subject:
i have recently had the problem of needing an if like this: If A=1 and B=0 or B=10

but the program would read If A=1 and B=0
or would read If B=10
so when B=10 it would run the if without checking A too

i finally tried the dumbest thing i could think of and it worked

If A=1 and (B=0 or B=10)
and it was solved!


note: if this is already common knowledge plz don't laugh at me Sad
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Darth Android
DragonOS Dev Team


Bandwidth Hog


Joined: 31 May 2003
Posts: 2104
Posted: 30 Jan 2004 10:02:36 pm    Post subject:
*laughs hysterically at babyboy*

yes, parenthesis can be used for a myraid of things. you'd be surprised.
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Jeremiah Walgren
General Operations Director


Know-It-All


Joined: 24 May 2003
Posts: 1937
Posted: 30 Jan 2004 10:28:36 pm    Post subject:
Ahh, brings back memories of the days when I couldn't find one simple little problem - and thought myself to be an idiot when I did find it.
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X1011
10100111001


Active Member


Joined: 14 Nov 2003
Posts: 657
Posted: 31 Jan 2004 01:31:58 pm    Post subject:
Quote:
If A=1 and (B=0 or B=10)

Yea, that's just like using:

If (A=1)(not(B)+(B=10

Last edited by Guest on 31 Jan 2004 01:33:13 pm; edited 1 time in total
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DarkerLine
ceci n'est pas une |


Super Elite (Last Title)


Joined: 04 Nov 2003
Posts: 8328
Posted: 31 Jan 2004 07:46:12 pm    Post subject:
Also

If Anot(B(B-10
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Babyboy


Advanced Member


Joined: 11 Jun 2003
Posts: 499
Posted: 31 Jan 2004 08:32:47 pm    Post subject:
my brain hurts
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DarkerLine
ceci n'est pas une |


Super Elite (Last Title)


Joined: 04 Nov 2003
Posts: 8328
Posted: 31 Jan 2004 08:41:35 pm    Post subject:
It's simple. The quadratic inside the not is only equal to 0 when B equals 0 or 10. when the quadratic is 0, not( makes it 1, or true, otherwise it's 0, or false. Actually it should be

(A=1)not(B(B-10

because otherwise it might be true when A=2.
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X1011
10100111001


Active Member


Joined: 14 Nov 2003
Posts: 657
Posted: 26 Feb 2004 08:12:27 pm    Post subject:
Hey, here's something I didn't know before, you can store a string to a list and it won't calculate it untill you ask for it. It also shows a dot next to the list in the list editor.
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Adm.Wiggin
aka Tianon


Know-It-All


Joined: 02 Jun 2003
Posts: 1874
Posted: 26 Feb 2004 10:18:51 pm    Post subject:
but, the real trouble comes when you wish to retrieve that string...
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Darth Android
DragonOS Dev Team


Bandwidth Hog


Joined: 31 May 2003
Posts: 2104
Posted: 26 Feb 2004 10:32:10 pm    Post subject:
thats the formula Laughing

Code:
Delvar L2Delvar L1
"L1^2->L2
{2,3,4,5,6,7,8,9,10->L1

now take a look at L2...
it is the squares of the elements in L1! ({4,9,16,25,36,49,64,81,100,})

the dot is a paper clip: it shows that there is a formula attached to the list.

Last edited by Guest on 26 Feb 2004 10:35:13 pm; edited 1 time in total
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X1011
10100111001


Active Member


Joined: 14 Nov 2003
Posts: 657
Posted: 27 Feb 2004 04:48:17 pm    Post subject:
Quote:
the dot is a paper clip

How can you tell? Confused
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DarkerLine
ceci n'est pas une |


Super Elite (Last Title)


Joined: 04 Nov 2003
Posts: 8328
Posted: 27 Feb 2004 04:52:07 pm    Post subject:
Adm.Wiggin wrote:
but, the real trouble comes when you wish to retrieve that string...

Is there any BASIC way to retrieve the formula that goes with the list? I know Asm can do it... If so then you can basically have nameable strings!
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Ray Kremer


Member


Joined: 16 Feb 2004
Posts: 237
Posted: 27 Feb 2004 06:14:34 pm    Post subject:
X1011 wrote:
Hey, here's something I didn't know before, you can store a string to a list and it won't calculate it untill you ask for it.

That's not a string, quotes are how you store equation variables on the 83 series. It works with the graph equation variables to. The 85/86 does it with the = sign, the 89 series with Define() or the store arrow.
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X1011
10100111001


Active Member


Joined: 14 Nov 2003
Posts: 657
Posted: 28 Feb 2004 02:37:30 pm    Post subject:
Ray Kremer wrote:
X1011 wrote:
Hey, here's something I didn't know before, you can store a string to a list and it won't calculate it untill you ask for it.

That's not a string, quotes are how you store equation variables on the 83 series. It works with the graph equation variables to. The 85/86 does it with the = sign, the 89 series with Define() or the store arrow.

Yea but say you do

"{1,2,3}"->Str1
Str1->L1
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Ray Kremer


Member


Joined: 16 Feb 2004
Posts: 237
Posted: 28 Feb 2004 04:39:52 pm    Post subject:
X1011 wrote:
"{1,2,3}"->Str1
Str1->L1

Dang, the 83 is goofy. Still, that's not storing a string to a list, because only a list can be stored to a list. It just means that strings stored to Str variables are strings, and strings stored to anything else turn into equations or whatnot. Oh look, I'm arguing semantics. Okay, never mind then.
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DarkerLine
ceci n'est pas une |


Super Elite (Last Title)


Joined: 04 Nov 2003
Posts: 8328
Posted: 28 Feb 2004 05:46:40 pm    Post subject:
It doesn't matter what it is. If you store "This is not a real string but who cares all right just say it is -> LIST (you don't need the L_), it will be stored anyway and nothing will be done to it. In fact, the data is right there in L_LIST just like in a string.
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Undocumented Tricks in Basic
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