红宝石.为什么arr =%w {'a','b','c'} =>["a","b","c") [英] Ruby. Why arr = %w{'a', 'b', 'c'} => ["'a',", "'b',", "'c'"]

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问题描述

来自这个问题 Ruby中的indexOf

想知道为什么使用Ruby arr =%w {'a','b','c'}#=>['a',",'b',",'c'"]

Wondering why in Ruby arr = %w{'a', 'b', 'c'} #=> ["'a',", "'b',", "'c'"]

推荐答案

%w {one two} ["one","two"] 的快捷方式:%w {...... 表示法将以空格分隔的元素用作数组的字符串.

%w{one two} is a shortcut for ["one", "two"]: the %w{...} notation takes the space-separated elements as strings for the array.

这实际上是%w {...... 背后的全部原因:编写不带引号或逗号的数组以分隔元素,从而允许使用引号和逗号而不转义它们.

This is actually the whole reason behind %w{...}: writing arrays without quotes or commas to separate the elements, thus allowing the use of quotes and commas without escaping them.

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