When I write string.match(str, "["), I get Invalid match pattern: expected ] at the end of the string to close a set. I want to find if [ exists in a string, but I don’t know why that error occurs.
Add a backslash:
string.match(str, "\[")
“[” is a special character. Using a backslash lets the interpreter know you’re searching for the “[” literal instead of using it for special functionality.
[Edit] Corretion: use % instead of backslash. Refer to this reply:
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Actually, for this you’d use % since you’re looking for a string pattern (and \[ isn’t an escape character)
string.match(str, "%[")
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Good catch! I will edit my post accordingly. Thanks!
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