Puppet Function: grep

Defined in:
lib/puppet/parser/functions/grep.rb
Function type:
Ruby 3.x API

Summary

This function searches through an array and returns any elements that match the provided regular expression.

Overview

grep() ⇒ Any

> Note: that since Puppet 4.0.0, the built-in [‘filter`](puppet.com/docs/puppet/latest/function.html#filter) function does the “same” - as any logic can be used to filter, as opposed to just regular expressions: “`[’aaa’, ‘bbb’, ‘ccc’, ‘aaaddd’]. filter |$x| { $x =~ ‘aaa’ }“‘

Examples:

Example Usage:

grep(['aaa','bbb','ccc','aaaddd'], 'aaa') # Returns ['aaa','aaaddd']

Returns:

  • (Any) —

    array of elements that match the provided regular expression.



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# File 'lib/puppet/parser/functions/grep.rb', line 7

newfunction(:grep, type: :rvalue, doc: <<-DOC
  @summary
    This function searches through an array and returns any elements that match
    the provided regular expression.

  @return
    array of elements that match the provided regular expression.
  @example Example Usage:
    grep(['aaa','bbb','ccc','aaaddd'], 'aaa') # Returns ['aaa','aaaddd']

  > **Note:** that since Puppet 4.0.0, the built-in
  [`filter`](https://puppet.com/docs/puppet/latest/function.html#filter) function does
  the "same" - as any logic can be used to filter, as opposed to just regular expressions:
  ```['aaa', 'bbb', 'ccc', 'aaaddd']. filter |$x| { $x =~ 'aaa' }```
  DOC
) do |arguments|
  if arguments.size != 2
    raise(Puppet::ParseError, "grep(): Wrong number of arguments given #{arguments.size} for 2")
  end

  a = arguments[0]
  pattern = Regexp.new(arguments[1])

  a.grep(pattern)
end