1.匹配字符串中的数字、字母和下划线
str = "hello_+asdf2312+887441a+asdf"
table = {}
string.gsub(str, "([%w_]+)",
function(w)
table.insert(table, w)
end)
end)
2.替换字符串中的指定字符
str = "hello,john"
s = string.gsub(str, "john", "james")
s ==>"hello,james"
3.判断字符串中是否有目标字串
str = "hello,john"
start, end = string.find(str, "hello")
start ==>1
end ==>5
4.从文件的绝对路径中获取到文件名
fn_flag = string.find(filename, "\\")
if fn_flag then
dest_filename = string.match(filename, ".+\\([^\\]*%.%w+)$")
end
fn_flag = string.find(filename, "/")
if fn_flag then
dest_filename = string.match(filename, ".+/([^/]*%.%w+)$")
end