Ruby arrays: %w vs %W

有什么不同？

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％w引用像单引号'' （没有可变内插，更少的转义序列），而％W引号像双引号"" 。

irb(main):001:0> foo="hello"
=> "hello"
irb(main):002:0> %W(foo bar baz #{foo})
=> ["foo", "bar", "baz", "hello"]
irb(main):003:0> %w(foo bar baz #{foo})
=> ["foo", "bar", "baz", "#{foo}"]

---

我发现的％W和％w的应用程序：

greetings = %W(hi hello #{"how do you do"})
# => ["hi", "hello", "how do you do"]

---

%W performs normal double quote substitutions. %w does not.

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