Lua String patterns - shorter code

Question

Is it possible to take this:

a=[[do end workspace.Part["Child 1"].Object.child2["thing"]remove() do end]]
a=a:gsub("%.%a+","{F}%0{F}")  
a=a:gsub('(%[%s*([\'"]?).*%2%s*%]):remove%(%)','{F}%1{F}:remove()')
a=a:gsub('{F}%s*{F}','')
a=a:gsub('{F}.-{F}','filterremove(%0)')

Output: do end filterremove(Workspace.Part["Child 1"].Object.child2["thing"]) do end

and use only one gsub to have the same result, rather than two? regardless of the combination of x.y, x[y], [x][y], etc.

Input: workspace.Part["Child"]:remove(), Output: filterremove(workspace.Part["Child"]) — Waffle
– Waffle, Commented Feb 28, 2013 at 15:20
a=a:gsub("(.*)%:remove%(%)", "filterremove(%1)") <- works fine. — hjpotter92
– hjpotter92, Commented Feb 28, 2013 at 15:25
That will try to put the entire program up to 'remove' into one function. — Waffle
– Waffle, Commented Feb 28, 2013 at 15:26

Paul Kulchenko · Accepted Answer · 2013-02-28 16:27:00Z

1

a:gsub("(%S*%b[]):remove%(%)", "filterremove(%1)")

edited Feb 28, 2013 at 16:27

answered Feb 28, 2013 at 16:15

Paul Kulchenko

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1 Comment

Paul Kulchenko Over a year ago

I know, but then you need to specify an example you want to see working. Or several examples. As soon as someone comes up with implementation that satisfies them, you get what you need.

Eric · Accepted Answer · 2013-02-28 17:09:09Z

1

You can at least chain and line-wrap it:

a = [[do end workspace.Part["Child 1"]:remove() do end]]
a = a:gsub("%.%a+","{F}%0{F}")  
     :gsub('(%[%s*([\'"]?).*%2%s*%]):remove%(%)','{F}%1{F}:remove()')
     :gsub('{F}%s*{F}','')
     :gsub('{F}.-{F}','filterremove(%0)')

Really though, this is never going to work. What about:

workspace.remove(x)
workspace["remove"](x)
getfenv()["work" .. "space"]["re".."move"](x)

edited Feb 28, 2013 at 17:09

answered Feb 28, 2013 at 16:29

Eric

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4 Comments

Paul Kulchenko Over a year ago

and what about spaces: workspace . Part["..."] :remove(); OP needs to make at least some assumptions...

Eric Over a year ago

@Paul: I don't think the OP can afford to make any assumptions, since they are almost certainly trying to sandbox unknown code.

Paul Kulchenko Over a year ago

I wasn't aware of that, but if that's the case these attempts are futile.

Waffle Over a year ago

Spaces are not a problem. %s*, now forget about it. Concatenation and variables where I can't catch whether or not it is using 'remove' is the problem.

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