Colby Klein
e61bb07373
Added: string.split (usage: string.split("1-2-3", "-") => { 1, 2, 3 })
Added: table.join (alias of table.concat, for convenience)
Added: table.push (multiple element insert. usage: table.push(t, 1, 2, ...). Used extensively in optics)
39 lines
980 B
Lua
39 lines
980 B
Lua
-- Utilities for better table manipulation
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-- split a string into a table
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-- http://lua-users.org/wiki/SplitJoin (but with error messages)
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function string.split(self, sSeparator, nMax, bRegexp)
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assert(sSeparator ~= '', "empty separator is not allowed.")
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assert(nMax == nil or nMax >= 1, "max must be a positive number.")
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local aRecord = {}
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if self:len() > 0 then
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local bPlain = not bRegexp
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nMax = nMax or -1
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local nField=1 nStart=1
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local nFirst,nLast = self:find(sSeparator, nStart, bPlain)
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while nFirst and nMax ~= 0 do
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aRecord[nField] = self:sub(nStart, nFirst-1)
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nField = nField+1
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nStart = nLast+1
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nFirst,nLast = self:find(sSeparator, nStart, bPlain)
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nMax = nMax-1
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end
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aRecord[nField] = self:sub(nStart)
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end
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return aRecord
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end
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-- table.concat alias for convenience.
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table.join = table.concat
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-- insert multiple elements into a table at once
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function table.push(self, ...)
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for _, v in ipairs({...}) do
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table.insert(self, v)
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end
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end
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