Module: Yast::Builtins::List

Defined in:
src/ruby/yast/builtins.rb

Overview

builtins enclosed in List namespace

Class Method Summary collapse

Class Method Details

.reduce(*params, &block) ⇒ Object

Deprecated.

use Array#reduce instead

Reduces a list to a single value.



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# File 'src/ruby/yast/builtins.rb', line 357

def self.reduce(*params, &block)
  return nil if params.first.nil?
  list = if params.size == 2 # so first is default and second is list
    return nil if params[1].nil?
    [params.first].concat(Yast.deep_copy(params[1]))
  else
    params.first
  end
  Yast.deep_copy(list).reduce(&block)
end

.swap(list, offset1, offset2) ⇒ Object

Note:

Array#reverse should be used for complete array swap

Creates new list with swaped elements at offset i1 and i2.



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# File 'src/ruby/yast/builtins.rb', line 370

def self.swap(list, offset1, offset2)
  return nil if list.nil? || offset1.nil? || offset2.nil?

  return Yast.deep_copy(list) if offset1 < 0 || offset2 >= list.size || (offset1 > offset2)

  res = []

  res.concat(list[0..offset1 - 1]) if offset1 > 0
  res.concat(list[offset1..offset2].reverse!)
  res.concat(list[offset2 + 1..-1]) if offset2 < list.size - 1

  Yast.deep_copy(res)
end