StringPosition

StringPosition["string", "sub"] gives a list of the starting and ending character positions at which "sub" appears as a substring of "string".

StringPosition["string", "sub", k] includes only the first k occurrences of "sub".

StringPosition["string", "", "", ... ] gives positions of all the "".

Example: StringPosition["abbaabbaa", "bb"] .

With the default option setting Overlaps -> True, StringPosition includes substrings that overlap. With the setting Overlaps -> False such substrings are excluded.

Setting the option IgnoreCase -> True makes StringPosition treat lower- and upper-case letters as equivalent.

Example: StringPosition["abAB", "a", IgnoreCase -> True] .

StringPosition returns sequence specifications in the form used by StringTake, StringDrop and StringReplacePart.

See The Mathematica Book: Section 2.7.2.

See also: Position, Characters, FindList, ReplaceList.

Further Examples