this post was submitted on 30 Sep 2023
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Question about gdscript: Which is more efficient? (sopuli.xyz)
submitted 1 year ago* (last edited 1 year ago) by s12@sopuli.xyz to c/godot@programming.dev
21 comments fedilink hide all child comments
 

I’m just curious about which is the most efficient way of doing this kind of node enumiration:

for i in something():
    o=[var1,var2,var3,varN][i]
    o.new()
    o.do_something_based_on_number_of_loops()
    add_child(o)

or

for i in something():
    match i:
        0:
            o=var1
            o.new()
            o.do_something_based_on_number_of_loops()
            add_child(o)
        1:
            o=var2
            o.new()
            o.do_something_based_on_number_of_loops()
            add_child(o)
        2:
            o=var3
            o.new()
            o.do_something_based_on_number_of_loops()
            add_child(o)
        N-1:
            o=varN
            o.new()
            o.do_something_based_on_number_of_loops()
            add_child(o)

or

var items = [var1,var2,var3,varN]
for i in something():
    o=items[i]
    o.new()
    o.do_something_based_on_number_of_loops()
    add_child(o)

Or is there a more efficient way of doing it?

Edit: Sorry if that wasn't clear. Is it better to constantly get something from an "unstored list", store the list in a variable, or not use a list and use a match statement instead? Do they have any advantages/disadvantages that make them better in certain situations?

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[–] Rodeo@lemmy.ca 2 points 1 year ago* (last edited 1 year ago) (1 children) 
func _show_only_first_layer_dots():
    for c in $Layers.get_children():
        c.get_node("Dots").visible = false
    $Layers.get_child(0).get_node("Dots").visible = true

Mines 10x more readable ~~and I saved a line of code.~~

Simplicity is king.

[–] tabular@lemmy.world 0 points 1 year ago* (last edited 1 year ago) (1 children)

If you're working on the function then yes; everyone learns for loops fairly early on.

If you just need to know what it is intended to do then I would argue you didn't need to read anymore than the function name. If you do look further then I'd argue just the name of the helper function was easier to read than the whole for loop.

[–] Rodeo@lemmy.ca 1 points 1 year ago (2 children)

It's a poor name choice then, because it actually says less about what it's doing than the main function does.

Besides, what is the point of "looking further" just to stop at another function name? Wouldn't looking further imply the need to review the implementation?

[–] tabular@lemmy.world 1 points 1 year ago

In practice it turns out the method to make just the first element visible was redundant anyway. It would be made visible during the setup function that all elements call.

[–] tabular@lemmy.world 1 points 1 year ago

Seeing another function divides the code into another subsection. In the example it's the only one there but if more was added then you could choose where to focus your attention on the implementation.