Re: Suggestion for table.concat
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- Subject: Re: Suggestion for table.concat
- From: PA <petite.abeille@...>
- Date: 2007年10月24日 18:13:03 +0200
On Oct 24, 2007, at 06:08, Patrick Donnelly wrote:
Would it be possible to have a fifth optional parameter to
table.concat to have it use a passed function on values that are not
strings or numbers, to return strings.
Sure... roll your own... e.g.:
local function concat( anEncoder, aTable, aSeparator, aStart, anEnd )
local aStart = aStart or 1
local anEnd = anEnd or #aTable
local aBuffer = {}
for anIndex = aStart, anEnd do
aBuffer[ #aBuffer + 1 ] = anEncoder( aTable[ anIndex ] )
end
return table.concat( aBuffer, aSeparator, aStart, anEnd )
end
local t = { 'hi', 5, nil, 4, function() end, {} }
print( concat( tostring, t, ' ', 1, #t ) )
> hi 5 nil 4 function: 0x103da0 table: 0x103f40