blocks|key|1788006|text|是的，在Ruby中可以使用分号作为语句分隔符。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1788007|虽然我的典型风格(以及我看到的大多数代码)在每一行都放了一行代码，因此;的使用是非常不必要的。|offset|length|style|CODE|1788008|entityMap^0|0|Z|1|0^^$0|@$1|2|3|4|5|6|7|J|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|K|8|@$D|L|E|M|F|G]]|9|@]|A|$]]|$1|H|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|I|$]]

Yes, semicolons can be used as statement separators in Ruby.

Though my typical style (and most code I see) puts a line of code on each line, so the use of <code>;</code> is pretty unnecessary.

blocks|key|1788191|text|顺便说一下，在(j)irb会话中使用分号可以避免打印出过长的表达式值，例如|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1788192|irb[0]>+x+=+(1..1000000000).to_a
[printout+out+the+whole+array]|code-block|syntax|javascript|1788193|vs|1788194|irb[0]>+x+=+(1..100000000).to_a;+nil|1788195|特别适合你的MyBigORMObject.find_all调用。|1788196|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

As a side note, it's useful to use semi-colons in your (j)irb session to avoid printing out a ridiculously long expression value, e.g.

<pre><code>irb[0]&gt; x = (1..1000000000).to_a
[printout out the whole array]
</code></pre>

vs

<pre><code>irb[0]&gt; x = (1..100000000).to_a; nil
</code></pre>

Nice especially for your MyBigORMObject.find_all calls.

blocks|key|2001946|text|我遇到的唯一一种情况是在为attr_reader声明别名方法时使用分号。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2001947|考虑以下代码：|2001948|attr_reader+:property1_enabled
attr_reader+:property2_enabled
attr_reader+:property3_enabled

alias_method+:property1_enabled?,+:property1_enabled
alias_method+:property2_enabled?,+:property2_enabled
alias_method+:property3_enabled?,+:property3_enabled|code-block|syntax|javascript|2001949|通过使用分号，我们可以将代码减少到3行：|2001950|attr_reader+:property1_enabled;+alias_method+:property1_enabled?,+:property1_enabled
attr_reader+:property2_enabled;+alias_method+:property2_enabled?,+:property2_enabled
attr_reader+:property3_enabled;+alias_method+:property3_enabled?,+:property3_enabled|2001951|对我来说，这并没有真正降低可读性。|2001952|entityMap^0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|T|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|U|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|V|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|W|8|@]|9|@]|A|$]]]|P|$]]

The only situation I've come across that semicolons are useful is when declaring alias methods for attr_reader.

Consider the following code:

<pre><code>attr_reader :property1_enabled
attr_reader :property2_enabled
attr_reader :property3_enabled

alias_method :property1_enabled?, :property1_enabled
alias_method :property2_enabled?, :property2_enabled
alias_method :property3_enabled?, :property3_enabled
</code></pre>

By using semicolons we can reduce this down 3 lines:

<pre><code>attr_reader :property1_enabled; alias_method :property1_enabled?, :property1_enabled
attr_reader :property2_enabled; alias_method :property2_enabled?, :property2_enabled
attr_reader :property3_enabled; alias_method :property3_enabled?, :property3_enabled
</code></pre>

To me this doesn't really take away from readability.

blocks|key|2002029|text|分号:是的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2002030|irb(main):018:0>+x+=+1;+c+=+0
=>+0
irb(main):019:0>+x
=>+1
irb(main):020:0>+c
=>+0|code-block|syntax|javascript|2002031|您甚至可以在一行循环中运行由分号分隔的多个命令|2002032|irb(main):021:0>+(c+%2B=+x;+x+%2B=+1)+while+x+<+10
=>+nil
irb(main):022:0>+x
=>+10
irb(main):023:0>+c
=>+45|2002033|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Semicolon: yes. 

<pre><code>irb(main):018:0&gt; x = 1; c = 0
=&gt; 0
irb(main):019:0&gt; x
=&gt; 1
irb(main):020:0&gt; c
=&gt; 0
</code></pre>

You can even run multiple commands separated by semicolons in a one-liner loop

<pre><code>irb(main):021:0&gt; (c += x; x += 1) while x &lt; 10
=&gt; nil
irb(main):022:0&gt; x
=&gt; 10
irb(main):023:0&gt; c
=&gt; 45
</code></pre>

blocks|key|1788416|text|使用分号来保留块语法可能很有趣，如下例所示：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1788417|a+=+[2,+3+,+1,+2,+3].reduce(Hash.new(0))+{+%7Ch,+num%7C+h[num]+%2B=+1;+h+}|code-block|syntax|javascript|1788418|你只需要维护一行代码。|1788419|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

It can be interesting to use semicolons to preserve the block syntax as in this example: 

<pre><code>a = [2, 3 , 1, 2, 3].reduce(Hash.new(0)) { |h, num| h[num] += 1; h }
</code></pre>

You maintain one line of code.

When learning Ruby, I noticed that in all the examples there are no semicolons. I am aware that this is perfectly fine as long as each statement is on its own line. But what I am wondering is, can you use semicolons in Ruby?

Can you use semicolons in Ruby?

在学习Ruby时，我注意到在所有示例中都没有分号。我知道，只要每条语句都在自己的行上，这是完全可以的。但我想知道的是，你能在Ruby中使用分号吗？

问你能在Ruby中使用分号吗？
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