String matching pattern -join and split

- - -
join Merge strings
plus Add numbers, append strings
split Split string at delimiter
splitlines Split a string at newlines
strjoin join the strings in the array
strsplit Splits a string or character vector at the specified delimiter
strtok Selected string part
extract Extract a substring from a string
extractAfter Extract the substring after the specified position
extractBefore Extract the substring before the specified position
extractBetween Extract the substring between the starting point and the ending point
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