---
name: "Perl::Critic::Policy::BuiltinFunctions::RequireBlockMap"
section: "3pm"
platform: "linux"
package: "perl-perl-critic"
version: "1.156-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Perl::Critic::Policy::BuiltinFunctions::RequireBlockMap"
---

# Perl::Critic::Policy::BuiltinFunctions::RequireBlockMap(3pm)

Write "map { /$pattern/ } @list" instead of "map /$pattern/, @list".

## NAME

Perl::Critic::Policy::BuiltinFunctions::RequireBlockMap - Write "map { /$pattern/ } @list" instead of "map /$pattern/, @list".

## AFFILIATION

This Policy is part of the core Perl::Critic distribution.

## DESCRIPTION

The expression forms of `"grep"` and `"map"` are awkward and hard to read.  Use the block forms instead.

```
    @matches = grep   /pattern/,   @list;        #not ok
    @matches = grep { /pattern/ }  @list;        #ok
    @mapped = map   transform($_),   @list;      #not ok
    @mapped = map { transform($_) }  @list;      #ok
```

## CONFIGURATION

This Policy is not configurable except for the standard options.

## SEE ALSO

Perl::Critic::Policy::BuiltinFunctions::ProhibitStringyEval

Perl::Critic::Policy::BuiltinFunctions::RequireBlockGrep

## AUTHOR

Jeffrey Ryan Thalhammer \<jeff@imaginative-software.com\>

## COPYRIGHT

Copyright (c) 2005-2013 Imaginative Software Systems.  All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license can be found in the LICENSE file included with this module.