Psych to_yaml选项的文档? [英] Documentation for Psych to_yaml options?

问题描述

Ruby 1.9.3默认将 Psych 用于YAML.尽管完全缺少有关ruby-doc的文档，但我当时能够找到一份暗示支持indentation选项的外部文档.这在测试中得到证实:

Ruby 1.9.3 defaults to using Psych for YAML. While the ruby-doc documentation for it is completely lacking, I was able to find one external piece of documentation that hinted that the indentation option is supported. This was borne out in testing:

irb(main):001:0> RUBY_VERSION
#=> "1.9.3"
irb(main):002:0> require 'yaml'
#=> true
irb(main):003:0> [[[1]]].to_yaml
#=> "---\n- - - 1\n"
irb(main):009:0> [[[1]]].to_yaml indentation:9
#=> "---\n-        -        - 1\n"

大概支持更多选项.具体来说，我想知道如何更改换行宽度或完全禁用它.

There are presumably more options supported. Specifically, I want to know how to change the line wrap width or disable it altogether.

有哪些可用选项?

推荐答案

深入了解ruby-1.9.3-p125/ext/psych/emitter.c的内心，我发现了三个选择:

Deep in the guts of ruby-1.9.3-p125/ext/psych/emitter.c I found three options:

• indentation-级别必须小于10且大于1.
• line_width-设置首选线宽.
• canonical-将输出样式设置为标准格式，否则为(true/false).

• indentation - The level must be less than 10 and greater than 1.
• line_width - Set the preferred line width.
• canonical - Set the output style to canonical, or not (true/false).

他们工作了！

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