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I need to make a conditional that is true if a particular matching text is found at least once in a string of text, e.g.:
str = "This is some text containing the word tiger." if string.match(str, "tiger") then print ("The word tiger was found.") else print ("The word tiger was not found.") How can I check if the text is found somewhere in the string?
945
> = string. match("foo 123 bar", '%d%d%d') -- %d matches a digit 123 > = string. match("text with an Uppercase letter", '%u') -- %u matches an uppercase letter U. Making the letter after the % uppercase inverts the class, so %D will match all non-digit characters.
gsub() function has three arguments, the first is the subject string, in which we are trying to replace a substring to another substring, the second argument is the pattern that we want to replace in the given string, and the third argument is the string from which we want to replace the pattern.
A StringValue is an object whose purpose is to store a single Lua string. The length of the string can't be more than 200,000 characters (this will cause a “String too long” error). Like all “-Value” objects, this single value is stored in the Value property.
There are 2 options to find matching text; string.match or string.find.
Both of these perform a regex search on the string to find matches.
string.find()string.find(subject string, pattern string, optional start position, optional plain flag) Returns the startIndex & endIndex of the substring found.
The plain flag allows for the pattern to be ignored and intead be interpreted as a literal. Rather than (tiger) being interpreted as a regex capture group matching for tiger, it instead looks for (tiger) within a string.
Going the other way, if you want to regex match but still want literal special characters (such as .()[]+- etc.), you can escape them with a percentage; %(tiger%).
You will likely use this in combination with string.sub
str = "This is some text containing the word tiger." if string.find(str, "tiger") then print ("The word tiger was found.") else print ("The word tiger was not found.") end string.match()string.match(s, pattern, optional index) Returns the capture groups found.
str = "This is some text containing the word tiger." if string.match(str, "tiger") then print ("The word tiger was found.") else print ("The word tiger was not found.") end If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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