ruby 符号数组是否有文字表示法？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/8816877/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
Is there a literal notation for an array of symbols?
提问by m_x
I like this literal expression for an array of strings:
我喜欢这个字符串数组的文字表达式：
%w( i can easily create arrays of words )
I am wondering if there is a literal to get an array of symbols. I know I can do
我想知道是否有文字来获取符号数组。我知道我能做到
%w( it is less elegant to create arrays of symbols ).map( &:to_sym )
but it would be so wonderful just to use a literal.
但仅使用文字就太棒了。
回答by David Grayson
Yes! This is possible now in Ruby 2.0.0. One way to write it is:
是的！这在 Ruby 2.0.0 中现在是可能的。一种写法是：
%i{foo bar} # => [:foo, :bar]
You can also use other delimiters, so you could also write %i(foo bar)or %i!foo bar!for example.
您还可以使用其他分隔符，因此您也可以编写%i(foo bar)或%i!foo bar!例如。
This feature was originally announced here:
此功能最初是在此处宣布的：
http://www.ruby-lang.org/zh_TW/news/2012/11/02/ruby-2-0-0-preview1-released/
http://www.ruby-lang.org/zh_TW/news/2012/11/02/ruby-2-0-0-preview1-released/
It is mentioned in the official documentation of Ruby here:
Ruby 的官方文档中提到了这里：
http://ruby-doc.org/core/doc/syntax/literals_rdoc.html#label-Percent+Strings
http://ruby-doc.org/core/doc/syntax/literals_rdoc.html#label-Percent+Strings
回答by Gareth
In Ruby 1.x, unfortunately the list of available %-delimitersis limited
在 Ruby 1.x 中，不幸的是可用的%-delimiters列表是有限的
Modifier Meaning
%q[ ] Non-interpolated String (except for \ \[ and \])
%Q[ ] Interpolated String (default)
%r[ ] Interpolated Regexp (flags can appear after the closing delimiter)
%s[ ] Non-interpolated Symbol
%w[ ] Non-interpolated Array of words, separated by whitespace
%W[ ] Interpolated Array of words, separated by whitespace
%x[ ] Interpolated shell command
