character or string -find and replace

look up

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contains Determine if there is a pattern in the string
matches Determine if a pattern matches a string
count Count the number of occurrences of a pattern in a string
endsWith Determine if a string ends with a pattern
startsWith Determine whether a string starts with a pattern
strfind Find a string in other strings
sscanf Read formatted data from a string
replace
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replace Find and replace one or more substrings
replaceBetween Replace the substring between the start and end
strrep Find and replace substring
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