blocks|key|621803|text|我更喜欢的方式是不用担心转义，而是使用%25q，它的行为类似于单引号字符串(没有插值或字符转义)，或者使用%25Q表示双引号字符串的行为：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|621804|str+=+%25q[ruby+'on+rails"+]+#+like+single-quoting
str2+=+%25Q[quoting+with+#{str}]+#+like+double-quoting:+will+insert+variable|code-block|syntax|javascript|621805|请参见https://docs.ruby-lang.org/en/trunk/syntax/literals_rdoc.html#label-Strings并搜索%25+strings。|621806|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.ruby-lang.org/en/trunk/syntax/literals_rdoc.html#label-Strings^0|J|2|1F|2|0|0|29|9|3|23|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|Z|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|M|3|-4|5|6|7|16|8|@]|D|@]|E|$]]]|N|$O|$5|P|Q|R|E|$S|T]]]]

My preferred way is to not worry about escaping and instead use <code>%q</code>, which behaves like a single-quote string (no interpolation or character escaping), or <code>%Q</code> for double quoted string behavior:

<pre><code>str = %q[ruby 'on rails" ] # like single-quoting
str2 = %Q[quoting with #{str}] # like double-quoting: will insert variable
</code></pre>

See <a href="https://docs.ruby-lang.org/en/trunk/syntax/literals_rdoc.html#label-Strings" rel="noreferrer">https://docs.ruby-lang.org/en/trunk/syntax/literals_rdoc.html#label-Strings</a> and search for <code>% strings</code>.

blocks|key|621847|text|使用反斜杠对字符进行转义|type|unstyled|depth|inlineStyleRanges|entityRanges|data|621848|str+=+"ruby+\'on+rails\"+"|code-block|syntax|javascript|621849|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Use backslash to escape characters

<pre><code>str = "ruby \'on rails\" "
</code></pre>

blocks|key|837985|text|下面是一个完整的列表：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|837986|​|837987|📷|atomic|offset|length|837988|837989|来自http://learnrubythehardway.org/book/ex10.html|837990|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/e688b7890786d0ce3267eaf385d1294f.png|imageAlt|1|LINK|MUTABLE|url|http://learnrubythehardway.org/book/ex10.html^0|0|0|0|1|0|0|0|2|19|1|0^^$0|@$1|2|3|4|5|6|7|Z|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|10|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|11|8|@]|9|@$G|12|H|13|1|14]]|A|$]]|$1|I|3|C|5|6|7|15|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|16|8|@]|9|@$G|17|H|18|1|19]]|A|$]]|$1|L|3|-4|5|6|7|1A|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]|U|$5|V|P|W|A|$X|Y]]]]

Here is a complete list:

<a href="https://i.stack.imgur.com/NCex6.png" rel="noreferrer"><img src="https://i.stack.imgur.com/NCex6.png" alt="enter image description here"></a>

From <a href="http://learnrubythehardway.org/book/ex10.html" rel="noreferrer">http://learnrubythehardway.org/book/ex10.html</a>

blocks|key|621699|text|您可以使用Q字符串，它允许您使用您喜欢的任何分隔符：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|621700|str+=+%25Q%7Cruby+'on+rails"+"+=+ruby+'on+rails%7C|code-block|syntax|javascript|621701|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can use Q strings which allow you to use any delimiter you like:

<pre><code>str = %Q|ruby 'on rails" " = ruby 'on rails|
</code></pre>

blocks|key|621664|text|>>+str+=+"ruby+'on+rails\"+\"+=+ruby+'on+rails"
=>+"ruby+'on+rails"+"+=+ruby+'on+rails"|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|621665|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>&gt;&gt; str = "ruby 'on rails\" \" = ruby 'on rails"
=&gt; "ruby 'on rails" " = ruby 'on rails"
</code></pre>

blocks|key|837889|text|如果我开始担心如何逃脱，我会用heredoc。它会帮你解决这个问题：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|837890|string+=+<<MARKER+
I+don't+have+to+"worry"+about+escaping!!'"!!
MARKER|code-block|syntax|javascript|837891|标记描绘字符串的开始/结束。在打开heredoc之后，在下一行开始字符串，然后在它自己的行上再次使用分隔符来结束字符串。|837892|这将完成所需的所有转义，并转换为双引号字符串：|837893|string
=>+"I+don't+have+to+\"worry\"+about+escaping!!'\"!!\n"|837894|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikibooks.org/wiki/Ruby_Programming/Here_documents^0|F|7|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@$A|X|B|Y|1|Z]]|C|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|11|8|@]|9|@]|C|$]]|$1|K|3|L|5|6|7|12|8|@]|9|@]|C|$]]|$1|M|3|N|5|F|7|13|8|@]|9|@]|C|$G|H]]|$1|O|3|-4|5|6|7|14|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

I would go with a <a href="http://en.wikibooks.org/wiki/Ruby_Programming/Here_documents" rel="noreferrer">heredoc</a> if I'm starting to have to worry about escaping. It will take care of it for you:

<pre><code>string = &lt;&lt;MARKER 
I don't have to "worry" about escaping!!'"!!
MARKER
</code></pre>

MARKER delineates the start/end of the string. start string on the next line after opening the heredoc, then end the string by using the delineator again on it's own line.

This does all the escaping needed and converts to a double quoted string: 

<pre><code>string
=&gt; "I don't have to \"worry\" about escaping!!'\"!!\n"
</code></pre>

blocks|key|838029|text|我会使用just：str+=+%25(ruby+'on+rails+")，因为just+%25代表双引号(或%25Q)，并且允许对字符串中的变量进行插值。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|838030|entityMap^0|9|P|16|1|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

I would use just:
<code>
str = %(ruby 'on rails ")
</code>
Because just <code>%</code> stands for double quotes(or %Q) and allows interpolation of variables on the string.

blocks|key|837793|text|以下是如何在更复杂的场景中使用%25Q[]的示例：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|837794|++%25Q[
++++<meta+property="og:title"+content="#{@title}"+/>
++++<meta+property="og:description"+content="#{@fullname}'s+profile.+#{@fullname}'s+location,+ranking,+outcomes,+and+more."+/>
++].html_safe|code-block|syntax|javascript|837795|entityMap^0|F|4|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Here is an example of how to use <code>%Q[]</code> in a more complex scenario:

<pre><code> %Q[
 &lt;meta property="og:title" content="#{@title}" /&gt;
 &lt;meta property="og:description" content="#{@fullname}'s profile. #{@fullname}'s location, ranking, outcomes, and more." /&gt;
 ].html_safe
</code></pre>

blocks|key|622230|text|需要注意的是：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|622231|使用%25Q[]和%25q[]进行字符串比较在直觉上并不安全。|offset|length|style|CODE|622232|例如，如果您加载的是表示为空的内容，如""或''，则需要使用实际的转义序列。例如，假设qvar等于""，而不是任何空字符串。|622233|这将计算为false|622234|if+qvar+==+"%25Q[]"|622235|就像这样，|622236|if+qvar+==+%25Q[]|622237|虽然它的计算结果是true|622238|if+qvar+==+"\"\""|622239|在将命令行变量从不同的堆栈发送到我的ruby脚本时，我遇到了这个问题。只有Gabriel+Augusto's+answer为我工作。|622240|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/a/31791519/3543437^0|0|2|4|7|4|0|J|2|M|2|17|4|1D|2|0|5|5|0|0|H|0|0|0|F|0|9|4|0|0|H|0|11|O|0|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|16|8|@$D|17|E|18|F|G]|$D|19|E|1A|F|G]]|9|@]|A|$]]|$1|H|3|I|5|6|7|1B|8|@$D|1C|E|1D|F|G]|$D|1E|E|1F|F|G]|$D|1G|E|1H|F|G]|$D|1I|E|1J|F|G]]|9|@]|A|$]]|$1|J|3|K|5|6|7|1K|8|@$D|1L|E|1M|F|G]]|9|@]|A|$]]|$1|L|3|M|5|6|7|1N|8|@$D|1O|E|1P|F|G]]|9|@]|A|$]]|$1|N|3|O|5|6|7|1Q|8|@]|9|@]|A|$]]|$1|P|3|Q|5|6|7|1R|8|@$D|1S|E|1T|F|G]]|9|@]|A|$]]|$1|R|3|S|5|6|7|1U|8|@$D|1V|E|1W|F|G]]|9|@]|A|$]]|$1|T|3|U|5|6|7|1X|8|@$D|1Y|E|1Z|F|G]]|9|@]|A|$]]|$1|V|3|W|5|6|7|20|8|@]|9|@$D|21|E|22|1|23]]|A|$]]|$1|X|3|-4|5|6|7|24|8|@]|9|@]|A|$]]]|Y|$Z|$5|10|11|12|A|$13|14]]]]

One caveat:

Using <code>%Q[]</code> and <code>%q[]</code> for string comparisons is not intuitively safe.

For example, if you load something meant to signify something empty, like <code>""</code> or <code>''</code>, you need to use the actual escape sequences. For example, let's say <code>qvar</code> equals <code>""</code> instead of any empty string.

This will evaluate to <code>false</code> 
<code>if qvar == "%Q[]"</code>

As will this, 
<code>if qvar == %Q[]</code>

While this will evaluate to <code>true</code> 
<code>if qvar == "\"\""</code>

I ran into this issue when sending command-line vars from a different stack to my ruby script. Only <a href="https://stackoverflow.com/a/31791519/3543437">Gabriel Augusto's answer</a> worked for me.

How can I escape single and double quotes in a string?

I want to escape single and double quotes together. I know how to pass them separately but don't know how to pass both of them.

e.g: <code>str = "ruby 'on rails" " = ruby 'on rails"</code>

Escaping single and double quotes in a string in ruby?

如何转义字符串中的单引号和双引号？我想同时转义单引号和双引号。我知道如何分别通过它们，但不知道如何同时通过两个。例如：str = "ruby 'on rails" " = ruby 'on rails"

问在ruby中转义字符串中的单引号和双引号？
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