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並前往https://www.ibm.com/docs/SSHRBY/com.ibm.swg.im.dashdb.udx.doc/doc/udx_lua_string_gsub_s_pattern_repl_n.html

string.gsub (s, pattern, repl [, n]) - IBM

... world from Lua", "(%w+)%s*(%w+)", "%2 %1") --> x="world hello Lua from" x = string.gsub("home = $HOME, user = $USER", "%$(%w+)", os.getenv) --> x="home ...

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