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格式化Ruby的预打印

pretty-print ruby

44

Myrddin Emrys · 技术社区 · 15 年前

可以更改预打印的宽度吗( require 'pp' )格式化输出时使用?例如:

"mooth"=>["booth", "month", "mooch", "morth", "mouth", "mowth", "sooth", "tooth"]
"morth"=>["forth",
 "mirth",
 "month",
 "mooth",
 "morph",
 "mouth",
 "mowth",
 "north",
 "worth"]

第一个数组以内联方式打印,因为它符合列宽预打印允许(79个字符)…第二行被拆分为多行,因为它没有。但我找不到任何方法来更改此行为开始的列。

pp 取决于 PrettyPrint (它可以为缓冲区提供不同的宽度)。有什么方法可以更改的默认列宽吗 聚丙烯 ,无需从头重写(访问 精美印刷品 直接)?

或者,是否有类似的Ruby Gem提供此功能?

2 回复 | 直到 9 年前

1

55

Wayne Conrad 12 年前

#!/usr/bin/ruby1.8

require 'pp'
mooth = [
  "booth", "month", "mooch", "morth",
  "mouth", "mowth", "sooth", "tooth"
]
PP.pp(mooth, $>, 40)
# => ["booth",
# =>  "month",
# =>  "mooch",
# =>  "morth",
# =>  "mouth",
# =>  "mowth",
# =>  "sooth",
# =>  "tooth"]
PP.pp(mooth, $>, 79)
# => ["booth", "month", "mooch", "morth", "mouth", "mowth", "sooth", "tooth"]

要使用monkey补丁更改默认值,请执行以下操作:

#!/usr/bin/ruby1.8

require 'pp'

class PP
  class << self
    alias_method :old_pp, :pp
    def pp(obj, out = $>, width = 40)
      old_pp(obj, out, width)
    end
  end
end

mooth = ["booth", "month", "mooch", "morth", "mouth", "mowth", "sooth", "tooth"]
pp(mooth)
# => ["booth",
# =>  "month",
# =>  "mooch",
# =>  "morth",
# =>  "mouth",
# =>  "mowth",
# =>  "sooth",
# =>  "tooth"]

这些方法也适用于MRI 1.9.3。

2

5

Abhijeet 8 年前

发现“AP”又称“Awesome_print”在 git-repo

用于测试pp和ap的代码:

require 'pp'
require 'ap' #requires gem install awesome_print 

data = [false, 42, %w{fourty two}, {:now => Time.now, :class => Time.now.class, :distance => 42e42}]
puts "Data displayed using pp command"
pp data

puts "Data displayed using ap command"
ap data

从PP到AP的O/P:

Data displayed using pp command
[false,
 42,
 ["fourty", "two"],
 {:now=>2015-09-29 22:39:13 +0800, :class=>Time, :distance=>4.2e+43}]

Data displayed using ap command
[
    [0] false,
    [1] 42,
    [2] [
        [0] "fourty",
        [1] "two"
    ],
    [3] {
             :now => 2015-09-29 22:39:13 +0800,
           :class => Time < Object,
        :distance => 4.2e+43
    }
]

参考文献: