Pythonic::Str
NAME
Pythonic::Str - Index into strings like Pythonistas do!
SYNOPSIS
use Pythonic::Str;
say 'foobar'[3]; # b
say 'foobar'[3..*]; # bar
say 'foobar'[^3]; # foo
say 'foobar'[3,5,6]:exists; # (True True False)
DESCRIPTION
Provides &postcircumfix:<[ ]>
candidates to index into strings. Any indexing operation you normally can use on lists is supported.
When multiple indices are given, the result will be calculated as if the indexing were called on a list of individual characters that compose the given string. If all the elements nodally are of type Str
or Nil
(excluding Failure
s), then the result will be joined together to form a single string. Any other type of the output is returned as if it were called on a list of individual characters that compose the given string.
In plainer language this means that you get a single string result for stuff like:
say 'foobar'[^3]; # foo
say 'foobar'[0, 1, 2]; # foo
say 'foobar'[0, (1, (2,))]; # foo
... but will get the same result as if you called indexing on a list of characters for stuff like:
say 'foobar'[^3]:p; # (0 => f 1 => o 2 => o)
say 'foobar'[0, 1, 2]:exists; # (True True True)
say WHAT 'foobar'[1]:delete; # (Failure)
LIMITATIONS
This module does not provide Str.AT-POS
or make Str
type do Positional
or Iterable
roles. The latter causes all sorts of fallout with core and non-core code due to inherent assumptions that Str
type does not do those roles. What this means in plain English is you can only index your strings with [...]
postcircumfix operator and can't willy-nilly treat them as lists of charactersâsimply. Call .comb if you need that.
SEE ALSO
AUTHOR
Zoffix Znet
COPYRIGHT AND LICENSE
Copyright 2017 Zoffix Znet
Copyright 2018 - 2022 Raku Community
This library is free software; you can redistribute it and/or modify it under the Artistic License 2.0.