反斜杠在红宝石中打破字符串插值 [英] Backslash breaks string interpolation in ruby

问题描述

我想最终得到字符串/ a_setting / c\blah = something，其中属性被评估为它的值：blah。但是，我看到以下行为，其中前面的反斜杠似乎停止对变量的评估：

I'd like to end up with the string "/a_setting/c\blah = something" where attribute gets evaluated to its value: blah. However, I'm seeing the following behavior where the preceding backslash seems to stop the evaluation of the variable:


attribute = blah

/ a_setting / c\＃{attribute} = something

=> / a_setting / c\＃{attribute} = something

/ a_setting / c\＃{attribute} = something

=> / a_setting / c blah = something


推荐答案

要获取字符串想要：

"/a_setting/c\\#{attribute} = something"

您需要通过反斜杠转义反斜杠。

You need to escape the backslash by backslash.

• 当您执行\＃时，＃将被转义，并被解释为不插入元素，但是作为逐字 c>＃，在检查中，在前面显示为\＃ {...} 以避免内插模糊。


• 当您执行\ / code>，（被冗余地）转义，被解释为逐字 。



• When you do "\#", the "#" is escaped, and is interpreted not as an interpolation element, but as the verbatim "#", which in inspection, appears as "\#" in front of {...} to avoid ambiguity with interpolation.
• When you do "\ ", the " " is (redundantly) escaped, and is interpreted as the verbatim " ".

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