StringIndices

Returns a list with the positions of all occurrences of a given substring in a string.

Syntax

StringIndices(s, x[, f[, δ]])
- s is the string to be searched
- x is the substring to search for
- f is a string
- δ is a positive integer

Description

If s and x are strings, then StringIndices returns the list with the positions of all occurrences of x in s, subject to any additional restrictions imposed by the remaining arguments. The list is sorted.

f specifies flags for the algorithm. It is a string that can contain zero or more of the following characters:

i: Makes StringIndices search for x in a case-insensitive manner.
w: Makes StringIndices only consider x to be a substring of s if x is found as a full word in s.

If omitted, f defaults to "" (no options).

Finally, if δ is specified, StringIndices will begin searching s for x at character index δ in s (the first character having index 1).

Examples

Alice ≔ ExampleData("Alice in Wonderland");

StringIndices(Alice, "rabbit", "i") \ 10