文件操作 - with.rb
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文件: /opt/puppetlabs/puppet/lib/ruby/vendor_ruby/puppet/parser/functions/with.rb
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# frozen_string_literal: true Puppet::Parser::Functions.newfunction( :with, :type => :rvalue, :arity => -1, :doc => <<~DOC Call a [lambda](https://puppet.com/docs/puppet/latest/lang_lambdas.html) with the given arguments and return the result. Since a lambda's scope is local to the lambda, you can use the `with` function to create private blocks of code within a class using variables whose values cannot be accessed outside of the lambda. **Example**: Using `with` ~~~ puppet # Concatenate three strings into a single string formatted as a list. $fruit = with("apples", "oranges", "bananas") |$x, $y, $z| { "${x}, ${y}, and ${z}" } $check_var = $x # $fruit contains "apples, oranges, and bananas" # $check_var is undefined, as the value of $x is local to the lambda. ~~~ - Since 4.0.0 DOC ) do |_args| Puppet::Parser::Functions::Error.is4x('with') end
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