Ruby 相当于 perl 的“Data::Dumper"用于打印深度嵌套的散列/数组 [英] Ruby equivalent of perl's "Data::Dumper" for printing deep nested hashes/arrays

问题描述

这不是 Ruby 等效于 Perl Data::Dumper 的副本.这个问题已经有超过 3.5 年的历史了，因此想要检查从那时起 Ruby 中是否有任何可用的新选项.

This is not a duplicate of Ruby equivalent of Perl Data::Dumper. That question is more than 3.5 years old and hence want to check are there any new options available in Ruby since then.

我在 ruby​​ 中寻找 perl 的 Dumper 等价物.我不在乎 Dumper 在幕后做了什么.我已经广泛地使用它在 perl 中打印深度嵌套的哈希和数组.到目前为止，我还没有在 ruby​​ 中找到替代品(或者我可能没有找到一种方法来充分利用 Ruby 中的可用替代品).

I am looking for perl's Dumper equivalent in ruby. I don't care what Dumper does behind the curtains. I have used it extensively for printing deep nested hashes and array in perl. So far I haven't found an alternative in ruby (Or I may not have find a way to make good use of available alternatives in Ruby).

这是我的 perl 代码及其输出:

This is my perl code and its Output:

#!/usr/bin/perl -w
use strict;
use Data::Dumper;

my $hash;

$hash->{what}->{where} = "me";
$hash->{what}->{who} = "you";
$hash->{which}->{whom} = "she";
$hash->{which}->{why} = "him";

print Dumper($hash);

输出:

$VAR1 = {
          'what' => {
                      'who' => 'you',
                      'where' => 'me'
                    },
          'which' => {
                       'why' => 'him',
                       'whom' => 'she'
                     }
        };

就是喜欢自卸车.:)

在 ruby​​ 中，我尝试了 pp、p、inspect 和 yaml.这是我在 ruby​​ 中的相同代码及其输出:

In ruby, I tried pp, p, inspect and yaml. here is my same code in ruby and its output:

#!/usr/bin/ruby
require "pp"
require "yaml"
hash = Hash.new{ |h,k| h[k] = Hash.new(&h.default_proc) }

hash[:what][:where] = "me"
hash[:what][:who] = "you"
hash[:which][:whom] = "she"
hash[:which][:why] = "him"

pp(hash)
puts "Double p did not help. Lets try single p"
p(hash)
puts "Single p did not help either...lets do an inspect"
puts hash.inspect
puts "inspect was no better...what about yaml...check it out"
y hash
puts "yaml is good for this test code but not for really deep nested structures"

输出:

{:what=>{:where=>"me", :who=>"you"}, :which=>{:whom=>"she", :why=>"him"}}
Double p did not help. Lets try single p
{:what=>{:where=>"me", :who=>"you"}, :which=>{:whom=>"she", :why=>"him"}}
Single p did not help either...lets do an inspect
{:what=>{:where=>"me", :who=>"you"}, :which=>{:whom=>"she", :why=>"him"}}
inspect was no better...what about yaml...check it out
--- 
:what: 
  :where: me
  :who: you
:which: 
  :whom: she
  :why: him
yaml is good for this test code but not for really deep nested structures

谢谢.

推荐答案

Awesome Print:

require 'awesome_print'
hash = {what: {where: "me", who: "you"}, which: { whom: "she", why: "him"}}
ap hash

输出(实际上是语法高亮):

Output (actually with syntax highlighting):

{
     :what => {
        :where => "me",
          :who => "you"
    },
    :which => {
        :whom => "she",
         :why => "him"
    }
}

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