blocks|key|1513545|text|您需要number_with_delimiter方法。例如：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1513546|<%25=+number_with_delimiter(@number,+:delimiter+=>+',')+%25>|code-block|syntax|javascript|1513547|或者，也可以使用number_with_precision方法来确保数字始终以两位小数精度显示：|1513548|<%25=+number_with_precision(@number,+:precision+=>+2,+:delimiter+=>+',')+%25>|1513549|entityMap|0|LINK|mutability|MUTABLE|url|http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#M001971|1|http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#M001972^0|3|L|3|L|0|0|0|8|L|8|L|1|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]]|D|@$9|11|A|12|1|13]]|E|$]]|$1|F|3|G|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|15|8|@$9|16|A|17|B|C]]|D|@$9|18|A|19|1|1A]]|E|$]]|$1|M|3|N|5|H|7|1B|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]|W|$5|R|S|T|E|$U|X]]]]

You want the <a href="http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#M001971" rel="noreferrer"><code>number_with_delimiter</code></a> method. For example:

<pre><code>&lt;%= number_with_delimiter(@number, :delimiter =&gt; ',') %&gt;
</code></pre>

Alternatively, you can use the <a href="http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#M001972" rel="noreferrer"><code>number_with_precision</code></a> method to ensure that the number is always displayed with two decimal places of precision:

<pre><code>&lt;%= number_with_precision(@number, :precision =&gt; 2, :delimiter =&gt; ',') %&gt;
</code></pre>

blocks|key|1513576|text|对于任何不使用rails的人：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1513577|number.to_s.reverse.gsub(/(\d{3})(?=\d)/,+'\\1,').reverse|code-block|syntax|javascript|1513578|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|$]]

For anyone not using rails:

<pre><code>number.to_s.reverse.gsub(/(\d{3})(?=\d)/, '\\1,').reverse
</code></pre>

blocks|key|1299085|text|要做到这一点，with+or+without+Rails的直接方法是：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1299086|require+'active_support'
require+'active_support/core_ext/numeric/conversions'

12345.to_s(:delimited)++++++#+=>+"12,345"
12345.6789.to_s(:delimited)+#+=>+"12,345.6789"|code-block|syntax|javascript|1299087|有关更多选项，请参阅Active+Support+Core+Extensions+-+Numeric+-+Formatting。|1299088|entityMap|0|LINK|mutability|MUTABLE|url|http://guides.rubyonrails.org/active_support_core_extensions.html#how-to-load-core-extensions|1|http://guides.rubyonrails.org/active_support_core_extensions.html#formatting^0|7|L|0|0|0|A|1H|1|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@$A|10|B|11|1|12]]|C|$]]|$1|K|3|-4|5|6|7|13|8|@]|9|@]|C|$]]]|L|$M|$5|N|O|P|C|$Q|R]]|S|$5|N|O|P|C|$Q|T]]]]

The direct way to do this, <a href="http://guides.rubyonrails.org/active_support_core_extensions.html#how-to-load-core-extensions" rel="noreferrer">with or without Rails</a>, is:
<pre><code>require 'active_support'
require 'active_support/core_ext/numeric/conversions'

12345.to_s(:delimited) # =&gt; &quot;12,345&quot;
12345.6789.to_s(:delimited) # =&gt; &quot;12,345.6789&quot;
</code></pre>
For more options, see <a href="http://guides.rubyonrails.org/active_support_core_extensions.html#formatting" rel="noreferrer">Active Support Core Extensions - Numeric - Formatting</a>.

blocks|key|1513483|text|是的，使用NumberHelper。您要查找的方法是number_with_delimiter。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1513484|+number_with_delimiter(98765432.98,+:delimiter+=>+",",+:separator+=>+".")
+#+=>+98,765,432.98|code-block|syntax|javascript|1513485|entityMap|0|LINK|mutability|MUTABLE|url|http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#M001971|1^0|5|C|0|Q|L|1|0|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@$A|S|B|T|1|U]|$A|V|B|W|1|X]]|C|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|Z|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]|Q|$5|L|M|N|C|$O|P]]]]

Yes, use the <a href="http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#M001971" rel="noreferrer">NumberHelper</a>. The method you are looking for is <a href="http://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html#M001971" rel="noreferrer">number_with_delimiter</a>.

<pre><code> number_with_delimiter(98765432.98, :delimiter =&gt; ",", :separator =&gt; ".")
 # =&gt; 98,765,432.98
</code></pre>

blocks|key|1299037|text|如果您想在视图之外添加逗号，并且不想包含某些模块，则可以使用number_to_delimited方法(rails+version+>=+4.02)。例如：|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1299038|#inside+anywhere
ActiveSupport::NumberHelper.number_to_delimited(1000000)+#+=>+"1,000,000"|code-block|syntax|javascript|1299039|entityMap|0|LINK|mutability|MUTABLE|url|http://apidock.com/rails/ActiveSupport/NumberHelper/number_to_delimited^0|U|J|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

If you want to add commas outside of views and you don't want to include some modules, you can use <a href="http://apidock.com/rails/ActiveSupport/NumberHelper/number_to_delimited" rel="noreferrer">number_to_delimited</a> method (rails version >= 4.02). For example:

<pre><code>#inside anywhere
ActiveSupport::NumberHelper.number_to_delimited(1000000) # =&gt; "1,000,000"
</code></pre>

blocks|key|1513632|text|如果您经常这样做，但仅供参考，因为上面并没有暗示这一点，Rails对number_with_delimiter方法有合理的默认值。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1513633|#inside+controller+or+view
number_with_delimiter(2444323.4)
#=>+2,444,323.30

#inside+console
helper.number_with_delimiter(233423)
#=>+233,423|code-block|syntax|javascript|1513634|如果采用最典型的方式，则无需提供分隔符的值。|1513635|entityMap^0|Y|L|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@$9|P|A|Q|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|R|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|S|8|@]|D|@]|E|$]]|$1|M|3|-4|5|6|7|T|8|@]|D|@]|E|$]]]|N|$]]

If you're doing it a lot but also FYI because it's not implied by the above, Rails has sensible defaults for the <code>number_with_delimiter</code> method.

<pre><code>#inside controller or view
number_with_delimiter(2444323.4)
#=&gt; 2,444,323.30

#inside console
helper.number_with_delimiter(233423)
#=&gt; 233,423
</code></pre>

No need to supply the delimiter value if you're doing it the most typical way.

blocks|key|1513752|text|另一种不使用帮助器的解决方案是:用两位小数格式化，然后替换。由，|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1513753|puts(("%25.2f"+%25+2.5666).gsub('.',','))
>>+2,57|code-block|syntax|javascript|1513754|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|$]]

Another solution that does not use Helpers: format with 2 decimal places, and then replace . by ,

<pre><code>puts(("%.2f" % 2.5666).gsub('.',','))
&gt;&gt; 2,57
</code></pre>

blocks|key|1513718|text|您可以使用ActiveSupport中的方法|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|1513719|例如：|1513720|ActiveSupport::NumberHelper::number_to_currency(10000.1234,{precision:+2,unit:+''})|1513721|entityMap^0|5|D|0|0|0|2B|0^^$0|@$1|2|3|4|5|6|7|L|8|@$9|M|A|N|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|O|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|P|8|@$9|Q|A|R|B|C]]|D|@]|E|$]]|$1|J|3|-4|5|6|7|S|8|@]|D|@]|E|$]]]|K|$]]

You can use methods from <code>ActiveSupport</code>

For example:

<code>ActiveSupport::NumberHelper::number_to_currency(10000.1234,{precision: 2,unit: ''})</code>

blocks|key|1299237|text|++def+add_commas(numstring)
++++correct_idxs+=+(1..100).to_a.select{%7Cn%7C+n+%25+6+==+0}.map{%7Cn%7C+n+-+1}
+++++numstring.reverse.chars.join(",").chars.select.with_index{%7Cx,+i%7C+i.even?+%7C%7C+correct_idxs.include?(i)}.join.reverse
++end|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1299238|这就是我在ruby的方式|unstyled|1299239|添加编辑:基本上它添加数字之间的所有逗号，并只选择索引%2B1%256的逗号|1299240|我认为逗号最多100个就可以了，但是如果你想要一个超长的数字，就把100作为一个更大的数字|1299241|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|N|8|@]|9|@]|A|$]]|$1|G|3|H|5|F|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|F|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|F|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<pre><code> def add_commas(numstring)
 correct_idxs = (1..100).to_a.select{|n| n % 6 == 0}.map{|n| n - 1}
 numstring.reverse.chars.join(",").chars.select.with_index{|x, i| i.even? || correct_idxs.include?(i)}.join.reverse
 end
</code></pre>

This was my way in ruby

Addition edit: 
Basically it adds all commas in between the numbers and only selects the ones where the index + 1 % 6

I figured the commas up to 100 was fine but if you want a super long number just make 100 a higher number

blocks|key|1299283|text|新语法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1299284|number_with_delimiter(@number,+delimiter:+",")|code-block|syntax|javascript|1299285|如果你想要用户定界符的钱，那么你可以这样做|1299286|number_to_currency(@number)|1299287|这也将添加$。如果您使用的是money+gem，那么可以这样做|offset|length|style|CODE|1299288|Money.new(@number,"USD").format|1299289|这也将把$。|1299290|number_with_delimiter|1299291|ruby+money|1299292|number_to_currency|1299293|entityMap|0|LINK|mutability|MUTABLE|url|https://apidock.com/rails/ActionView/Helpers/NumberHelper/number_with_delimiter|1|https://github.com/RubyMoney/money|2|https://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html^0|0|0|0|0|5|1|E|5|0|0|4|1|0|0|L|0|0|0|A|1|0|0|I|2|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|1D|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|1E|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|1F|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|1G|8|@$M|1H|N|1I|O|P]|$M|1J|N|1K|O|P]]|9|@]|A|$]]|$1|Q|3|R|5|D|7|1L|8|@]|9|@]|A|$E|F]]|$1|S|3|T|5|6|7|1M|8|@$M|1N|N|1O|O|P]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1P|8|@]|9|@$M|1Q|N|1R|1|1S]]|A|$]]|$1|W|3|X|5|6|7|1T|8|@]|9|@$M|1U|N|1V|1|1W]]|A|$]]|$1|Y|3|Z|5|6|7|1X|8|@]|9|@$M|1Y|N|1Z|1|20]]|A|$]]|$1|10|3|-4|5|6|7|21|8|@]|9|@]|A|$]]]|11|$12|$5|13|14|15|A|$16|17]]|18|$5|13|14|15|A|$16|19]]|1A|$5|13|14|15|A|$16|1B]]]]

new syntax
<pre><code>number_with_delimiter(@number, delimiter: &quot;,&quot;)
</code></pre>
If you you want to user delimeter for money then you can do
<pre><code>number_to_currency(@number)
</code></pre>
this will add <code>$</code> too. If you are using <code>money</code> gem then you can do
<pre><code>Money.new(@number,&quot;USD&quot;).format
</code></pre>
This will also put <code>$</code>.
<a href="https://apidock.com/rails/ActionView/Helpers/NumberHelper/number_with_delimiter" rel="nofollow noreferrer">number_with_delimiter</a>
<a href="https://github.com/RubyMoney/money" rel="nofollow noreferrer">ruby money</a>
<a href="https://api.rubyonrails.org/classes/ActionView/Helpers/NumberHelper.html" rel="nofollow noreferrer">number_to_currency</a>

blocks|key|1299310|text|下面的代码同时适用于分隔符和精度(API+ref)。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1299311|ActiveSupport::NumberHelper.number_to_rounded(1234.532,+delimiter:+',',+precision:+1)+|code-block|syntax|javascript|1299312|(或者仅从number_to_rounded视图，不需要前缀)|style|CODE|1299313|HTH|1299314|entityMap|0|LINK|mutability|MUTABLE|url|https://www.rubydoc.info/docs/rails/4.0.0/ActiveSupport%252FNumberHelper:number_to_rounded^0|H|7|0|0|0|5|H|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]]|$1|I|3|J|5|6|7|11|8|@$A|12|B|13|K|L]]|9|@]|C|$]]|$1|M|3|N|5|6|7|14|8|@]|9|@]|C|$]]|$1|O|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|P|$Q|$5|R|S|T|C|$U|V]]]]

The following do the trick for both delimiter and precision (<a href="https://www.rubydoc.info/docs/rails/4.0.0/ActiveSupport%2FNumberHelper:number_to_rounded" rel="nofollow noreferrer">API ref</a>).
<pre><code>ActiveSupport::NumberHelper.number_to_rounded(1234.532, delimiter: ',', precision: 1) 
 
</code></pre>
(or from views just <code>number_to_rounded</code>, no need for the prefix)
HTH

blocks|key|1513653|text|对于javascript爱好者来说|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1513654|function+numberWithDelimiter(value)+{
++++return+(value%2B"").split("").reverse().join("").replace(/(\d{3})(?=\d)/g,+'$1,').split("").reverse().join("")
}|code-block|syntax|javascript|1513655|:)|1513656|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|$]]

for javascript folks

<pre><code>function numberWithDelimiter(value) {
 return (value+"").split("").reverse().join("").replace(/(\d{3})(?=\d)/g, '$1,').split("").reverse().join("")
}
</code></pre>

:)

Is there a way to have rails print out a number with commas in it?

For example, if I have a number 54000000.34, I can run &lt;%= number.function %>, which would print out "54,000,000.34" 

thanks!

Rails: Is there a rails trick to adding commas to large numbers?

有没有办法让rails打印出一个带有逗号的数字？例如，如果我有一个数字54000000.34，我可以运行<%= number.function %>，这将打印出"54,000,000.34“谢谢!

问Rails:有没有给大数加逗号的rails技巧？
EN

回答 12

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问Rails:有没有给大数加逗号的rails技巧？EN

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问Rails:有没有给大数加逗号的rails技巧？
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