string-index

[procedure] string-index s char/char-set/pred [start end]

SRFI-13

See also string-index-right, string-contains.

[procedure] string-index s char [start end]

Guile: similar to SRFI-13's, but only accepts a character to search. Guile also has string-rindex.

[procedure] string-index proc string1 string2 ...

Chicken implements different functionality.

[procedure] string-index string1 string2

STk, STklos: This is similar to SRFI-13's string-contains.