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並前往https://tex.stackexchange.com/questions/52119/how-to-use-string-find-from-lua-in-context

How to use string.find from Lua in ConTeXt? - TeX - LaTeX ...

string.find() needs at least two arguments, the string to search and the ... \starttext \ctxlua{userdata.hasnumber("The number 1 is here, ...

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