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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
The letter "t" occurs in the 
 and 
 positions of this string.
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