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William Leue
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Joined: 03/07/2020
Location: United States
Posts: 405

Posted: 07:18pm 25 Aug 2020

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I have a few questions and/or comments about things that the manual does not cover:

1) I notice that if you use static initialization for a 2D array it puts the successive values in a column-major order. That is, if you do something like this:

option default integer
option base one

dim b(2,3) = (1,2,3,4,5,6)

then the values are put into the array like this

1 3 5
2 4 6

as opposed to a row-major language like C.

My question is, does this mean that MMBasic is in fact column-major, or is this just an artifact of the static initialization?

2) Given that static initialization is useful for more than 1D arrays, it is a pity that MMBasic does not seem to support any line continuation characters. I tried the ampersand and underscore continuation characters supported by various other BASIC dialects, but no luck. It would be great if we could get such a thing.

3) The manual says that memory is managed by the firmware using a dynamic heap. I am wondering whether that heap manager has any kind of garbage collection. It seems that there is no way in MMBasic to deallocate memory that has been assigned. Too bad, if available this would solve a number of problems related to temporary data storage in memory.

-Bill

JohnS
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Joined: 18/11/2011
Location: United Kingdom
Posts: 4139

Posted: 09:57pm 25 Aug 2020

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IIRC it doesn't use a heap and does no GC and needs none.

I'm wondering why you care how arrays are laid out?

John

mkopack73
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Joined: 03/07/2020
Location: United States
Posts: 261

Posted: 10:27pm 25 Aug 2020

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Always better to lay the Data out the way you want it rather than allowing it to map a 1d array into 2D. Ie you explicitly tell it what to put in (1,1), (2,1), (2,2), etc. that way you know the arrangement.

panky

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Joined: 02/10/2012
Location: Australia
Posts: 1116

Posted: 04:19am 26 Aug 2020

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option default integer
option base 1
dim a(2,3) = (1,2,3,4,5,6)
for y = �1 to 3
�for x = 1 to 2
� �print a(x,y);
�next x
�print
next y

> RUN
1 2
3 4
5 6

>
Edited 2020-08-26 14:20 by panky

... almost all of the Maximites, the MicromMites, the MM Extremes, the ArmMites, the PicoMite and loving it!

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