> For the complete documentation index, see [llms.txt](https://trizen.gitbook.io/perl6-rosettacode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://trizen.gitbook.io/perl6-rosettacode/programming_tasks/s/string_matching.md).

# String matching

Using string methods:

```perl
$haystack.starts-with($needle)  # True if $haystack starts with $needle
$haystack.contains($needle)     # True if $haystack contains $needle
$haystack.ends-with($needle)    # True if $haystack ends with $needle
```

Using regexes:

```perl
so $haystack ~~ /^ $needle  /  # True if $haystack starts with $needle
so $haystack ~~ /  $needle  /  # True if $haystack contains $needle
so $haystack ~~ /  $needle $/  # True if $haystack ends with $needle
```

Using `substr`:

```perl
substr($haystack, 0, $needle.chars) eq $needle  # True if $haystack starts with $needle
substr($haystack, *-$needle.chars) eq $needle   # True if $haystack ends with $needle
```

Bonus task:

```perl
$haystack.match($needle, :g)».from;  # List of all positions where $needle appears in $haystack
$haystack.indices($needle :overlap); # Also find any overlapping instances of $needle in $haystack
```