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DarkFingers1337

Multiple arrays vs multidimensional array

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Hey,

what is more efficient, using multiple arrays or one multidimensional array?

 

; Hamster data structure using multiple arrays
Global $HamsterCount = 6
Global $HamsterX[$HamsterCount]
Global $HamsterY[$HamsterCount]

;giving each hamster an x and y position
For $i=0 To $HamsterCount-1
    $HamsterX[$i] = 0
    $HamsterY[$i] = 0
Next

; The same hamster data structure using one multidimensional array
Global $HAMSTER_COUNT = 6
Global Enum $HAMSTER_X, _
            $HAMSTER_Y, _
            $HAMSTER_MAX
Global $Hamsters[$HAMSTER_COUNT][$HAMSTER_MAX]

;giving each hamster an x and y position
For $i=0 To $HAMSTER_COUNT-1
    $Hamsters[$i][$HAMSTER_X] = 0
    $Hamsters[$i][$HAMSTER_Y] = 0
Next

 

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It depends on your definition of efficient. Less typing, easier to read code, memory usage, faster execution speed, etc.

Explain you're parameters for efficiency and you can test everything yourself. 


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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I meant more efficient to run the program. Faster computation and more efficient RAM usage

When you say test it yourself, does that mean you don't know how the difference between two 1D arrays and one 2D array might affect referencing times? I'm somewhat surprised, I would've expected this has been benchmarked already. Well, maybe somebody else might know.

Edited by DarkFingers1337

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DarkFingers1337,

Quote

I'm somewhat surprised, I would've expected this has been benchmarked already

So here is your chance - do the benchmarking yourself so we can all share the result. Because I very much doubt anyone else is going to do it for you.

M23


Public_Domain.png.2d871819fcb9957cf44f4514551a2935.png Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind

Open spoiler to see my UDFs:

Spoiler

ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area

 

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17 hours ago, DarkFingers1337 said:

When you say test it yourself, does that mean you don't know how the difference between two 1D arrays and one 2D array might affect referencing times?

It means exactly that. I've never tested it, and I'm not aware of anyone else ever posting a test result of that. Frankly, in all of the scripts I've done, the only time speed of execution comes up for me is if it's doing something that requires timing constraints. Everything else is, "it gets done when it finishes", the time it takes to do it is secondary to making sure it gets done right.


If I posted any code, assume that code was written using the latest release version unless stated otherwise. Also, if it doesn't work on XP I can't help with that because I don't have access to XP, and I'm not going to.
Give a programmer the correct code and he can do his work for a day. Teach a programmer to debug and he can do his work for a lifetime - by Chirag Gude
How to ask questions the smart way!

I hereby grant any person the right to use any code I post, that I am the original author of, on the autoitscript.com forums, unless I've specifically stated otherwise in the code or the thread post. If you do use my code all I ask, as a courtesy, is to make note of where you got it from.

Back up and restore Windows user files _Array.au3 - Modified array functions that include support for 2D arrays.  -  ColorChooser - An add-on for SciTE that pops up a color dialog so you can select and paste a color code into a script.  -  Customizable Splashscreen GUI w/Progress Bar - Create a custom "splash screen" GUI with a progress bar and custom label.  -  _FileGetProperty - Retrieve the properties of a file  -  SciTE Toolbar - A toolbar demo for use with the SciTE editor  -  GUIRegisterMsg demo - Demo script to show how to use the Windows messages to interact with controls and your GUI.  -   Latin Square password generator

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