What's a better way of typing this?

[Jasoco]

I find myself doing this a lot...

Code: Select all

if variable == true then
  variable = false 
else
  variable = true 
end

There has to be a better, simpler way. But I must be missing it. Keep in mind I want to preserve boolean.

[Tesselode]

That's what I always do. And it seems just fine to me!

The only thing that would make that better is combining it into one line.

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if variable==true then variable==false else variable==true end

Short and sweet.

[Jasoco]

I always combine it actually. But I thought there was some better simpler way than typing it all out every single time.

[vrld]

Code: Select all

variable = not variable

[Simtex]

First of all in Lua any variable other than "nil" and "false" is considered true, so you can shorten your if-statement to:

Code: Select all

if variable then
   variable = false
else
   variable = true
end

That's a useful tip in general, but in this specific case the following is probably the easiest solution:

Code: Select all

variable = not variable

[bartbes]

Or in general those simple checks like

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if some_condition then
   x = a
else
   x = b
end

can be turned into this

Code: Select all

x = some_condition and a or b

[Tesselode]

Wouldn't using variable = not variable just make it false?

[bartbes]

No, because not false is true.

[Jasoco]

It's like making a negative number negative.

Code: Select all

variable = -(-1)
variable = 1

Thanks Bartbes, it'll be a lot easier to type that than the other way.

if debugVar == true then debugVar = false else debugVar = true end

to

debugVar = not debugVar

Saves a lot of typing.

[Jasoco]

How about this?

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variable = variable - dt
if variable < 0 then variable = 0 end

Is that as simple as it would get?

I've tried:

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if variable > 0 then varible = variable - dt end

But then I end up with variable going below 0. And the alternative check would be to just add that second if/then line again. Is there something possible with the use of math.max?