Strings

substr(theString, startIndex, len)

Returns the substring of theString starting at startIndex with length len, or as much as exists, otherwise an empty string

strindex(theString, regexp[, endIndex])

Returns the index of the first occurrence of regexp in theString, or -1 if not found. regexp is interpreted as a regular expression: any of the characters ^.[$'`()|*+?\{ must be quoted with a preceeding \ . See https://man.openbsd.org/re_format or type “man re_format” in a Terminal window for a detailed description of regular expression. If endIndex is supplied, it receives the index of the first character after the match.

trimWhitespace(theString)

Returns the substring of theString with leading and trailing spaces, tabs, and newlines removed.