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# frozen_string_literal: true
#
# grep.rb
#
module Puppet::Parser::Functions
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|
raise(Puppet::ParseError, "grep(): Wrong number of arguments given #{arguments.size} for 2") if arguments.size != 2
a = arguments[0]
pattern = Regexp.new(arguments[1])
a.grep(pattern)
end
end
# vim: set ts=2 sw=2 et :
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