我正在通过一个关于ruby的在线教程,发现这个“一般分隔字符串”,
%{a word} # => "a word"
%Q{a word} # => "a word"
%q{a word} # equivalent to single quoted version.
所以我尝试了irb,这是我看到的
2.0.0p247 :025 > %Q(hi) => "hi" 2.0.0p247 :026 > %q(the) => "the" 2.0.0p247 :027 > %q(th"e) => "th\"e" 2.0.0p247 :028 > %q(th'e) => "th'e" 2.0.0p247 :029 > %Q(h'i) => "h'i" 2.0.0p247 :030 > %Q(h"i) => "h\"i"
％q和％Q都表现相同,并以双引号括起来.任何人知道如何使用这些2,如果我们可以使用％{}得到相同的输出.
解决方法
这里有一些关于他们的提示
Ruby_Programming - The % Notation：
%Q[ ] – Interpolated String (default)
%q[ ] – Non-interpolated String (except for \,[ and ])
示例：
x = "hi"
p %Q[#{x} Ram!] #= > "hi Ram!"
p %q[#{x} Ram!] #= > "\#{x} Ram!"
p %Q[th\e] #= > "th\e"
p %q[th\e] #= > "th\\e" # notice the \\ with %q[]
另一个好的资源Percent Strings
Besides
%(...)which creates a String,The%may create other types of object. As with strings,an uppercase letter allows interpolation and escaped characters while a lowercase letter disables them.