Documentation for routine rindex assembled from the following types:

class Str

From Str

(Str) routine rindex

multi sub    rindex(Str:D $haystack, Str:D $needle, Int $startpos = $haystack.chars --> Int)
multi method rindex(Str:D $haystack: Str:D $needle, Int $startpos = $haystack.chars --> Int)

Returns the last position of $needle in $haystack not after $startpos. Returns Nil if $needle wasn't found.

Examples:

say rindex "Camelia is a butterfly", "a";     # OUTPUT: «11␤» 
say rindex "Camelia is a butterfly", "a", 10; # OUTPUT: «6␤»

class Cool

From Cool

(Cool) routine rindex

Defined as:

multi sub    rindex(Str(Cool) $haystack, Str(Cool) $needle, Int(Cool) $startpos = $haystack.chars)
multi method rindex(Str(Cool) $haystack: Str(Cool) $needle, Int(Cool) $startpos = $haystack.chars)

Coerces the first two arguments (including the invocant in method form) to Str and $startpos to Int, and returns the last position of $needle in $haystack not after $startpos. Returns an undefined value if $needle wasn't found.

See the documentation in type Str for examples.