lua split

发布时间：2020-12-14 22:11:23 所属栏目：大数据来源：网络整理

导读：?? function ?Split(str,?delim,?maxNb) ?? ????--?Eliminate?bad?cases... ?? ???? if ? string . find(str,?delim)?==? nil ? then ?? ????????return? {?str?} ?? ???? end ?? ???? if ?maxNb?==? nil ? or ?maxNb?? 1 ? then ?? ????????maxNb?=? 0 ????

function?Split(str,?delim,?maxNb) ??
????--?Eliminate?bad?cases... ??
????if?string.find(str,?delim)?==?nil?then??
????????return?{?str?}??
????end??
????if?maxNb?==?nil?or?maxNb?<?1?then??
????????maxNb?=?0????--?No?limit ??
????end??
????local?result?=?{}??
????local?pat?=?"(.-)"?..?delim?..?"()" ??
????local?nb?=?0??
????local?lastPos ??
????for?part,?pos?in?string.gfind(str,?pat)?do??
????????nb?=?nb?+?1??
????????result[nb]?=?part ??
????????lastPos?=?pos ??
????????if?nb?==?maxNb?then?break?end??
????end??
????--?Handle?the?last?field ??
????if?nb?~=?maxNb?then??
????????result[nb?+?1]?=?string.sub(str,?lastPos) ??
????end??
????return?result ??
end??

获取table的长度

t = {1,2,3,4,5}
print(table.getn(t))

print(#t)

（编辑：李大同）

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