blocks|key|180769|text|replacements+=+[+["every",+"all"],+["boy",+"girl"],["fine",+"well"]
replacements.each+{%7Creplacement%7C+str.gsub!(replacement[0],+replacement[1])}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|180770|我不知道是不是更好，但干净多了。|unstyled|180771|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|J|8|@]|9|@]|A|$]]|$1|G|3|-4|5|F|7|K|8|@]|9|@]|A|$]]]|H|$]]

<pre><code>replacements = [ ["every", "all"], ["boy", "girl"],["fine", "well"]
replacements.each {|replacement| str.gsub!(replacement[0], replacement[1])}
</code></pre>

I don't know if its better, but much cleaner.

blocks|key|180778|text|String#gsub和Hash#fetch将是很好的选择。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|180779|a+=+"every+good+boy+does+fine"
h+=+{"every"+=>+"all","boy"+=>+"girl",+"fine"+=>"well"+}
a.gsub(/\w%2B/)+{+%7Cm%7C+h.fetch(m,m)}
#+=>+"all+good+girl+does+well"|code-block|syntax|javascript|180780|或,|180781|a+=+"every+good+boy+does+fine"
h+=+{"every"+=>+"all","boy"+=>+"girl",+"fine"+=>"well"+}
Regexp.new("%5E#{h.keys.join('%7C')}$")+#+=>+/%5Eevery%7Cboy%7Cfine$/
a.gsub(Regexp.new("%5E#{h.keys.join('%7C')}$"),h)
#+=>+"all+good+girl+does+well"|180782|entityMap|0|LINK|mutability|MUTABLE|url|http://ruby-doc.org/core-2.0.0/String.html#method-i-gsub|1|http://ruby-doc.org/core-2.0.0/Hash.html#method-i-fetch^0|0|B|C|A|0|B|0|C|A|1|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]|$9|16|A|17|1|18]]|E|$]]|$1|F|3|G|5|H|7|19|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|1A|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|1B|8|@]|D|@]|E|$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]]]]

<a href="http://ruby-doc.org/core-2.0.0/String.html#method-i-gsub"><code>String#gsub</code></a> and <a href="http://ruby-doc.org/core-2.0.0/Hash.html#method-i-fetch"><code>Hash#fetch</code></a> will be the good choice for this.

<pre><code>a = "every good boy does fine"
h = {"every" =&gt; "all","boy" =&gt; "girl", "fine" =&gt;"well" }
a.gsub(/\w+/) { |m| h.fetch(m,m)}
# =&gt; "all good girl does well"
</code></pre>

or,

<pre><code>a = "every good boy does fine"
h = {"every" =&gt; "all","boy" =&gt; "girl", "fine" =&gt;"well" }
Regexp.new("^#{h.keys.join('|')}$") # =&gt; /^every|boy|fine$/
a.gsub(Regexp.new("^#{h.keys.join('|')}$"),h)
# =&gt; "all good girl does well"
</code></pre>

blocks|key|180791|text|如果意图是为了避免方法链接：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|180792|[9]+pry(main)>+"every+good+boy+does+fine".gsub("every",+"all").gsub("boy",+"girl").gsub("fine",+"well")
=>+"all+good+girl+does+well"
[10]+pry(main)>+"every+good+boy+does+fine".gsub(/(every)%7C(boy)%7C(fine)/)+do+%7Cword%7C
[10]+pry(main)*+++case+word
[10]+pry(main)*+++when+"every"
[10]+pry(main)*+++++"all"
[10]+pry(main)*+++when+"boy"
[10]+pry(main)*+++++"girl"
[10]+pry(main)*+++when+"fine"
[10]+pry(main)*+++++"well"
[10]+pry(main)*+++end
[10]+pry(main)*+end
=>+"all+good+girl+does+well"|code-block|syntax|javascript|180793|或者：|180794|[11]+pry(main)>+REPLACEMENT+=+{+"every"+=>+"all",+"boy"+=>+"girl",+"fine"+=>+"well"}
=>+{"every"=>"all",+"boy"=>"girl",+"fine"=>"well"}
[12]+pry(main)>+"every+good+boy+does+fine".gsub(/(every)%7C(boy)%7C(fine)/)+{+%7Cword%7C+REPLACEMENT[word]+}
=>+"all+good+girl+does+well"|180795|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|$]]

If the intent is to avoid method chaining:

<pre><code>[9] pry(main)&gt; "every good boy does fine".gsub("every", "all").gsub("boy", "girl").gsub("fine", "well")
=&gt; "all good girl does well"
[10] pry(main)&gt; "every good boy does fine".gsub(/(every)|(boy)|(fine)/) do |word|
[10] pry(main)* case word
[10] pry(main)* when "every"
[10] pry(main)* "all"
[10] pry(main)* when "boy"
[10] pry(main)* "girl"
[10] pry(main)* when "fine"
[10] pry(main)* "well"
[10] pry(main)* end
[10] pry(main)* end
=&gt; "all good girl does well"
</code></pre>

Alternatively:

<pre><code>[11] pry(main)&gt; REPLACEMENT = { "every" =&gt; "all", "boy" =&gt; "girl", "fine" =&gt; "well"}
=&gt; {"every"=&gt;"all", "boy"=&gt;"girl", "fine"=&gt;"well"}
[12] pry(main)&gt; "every good boy does fine".gsub(/(every)|(boy)|(fine)/) { |word| REPLACEMENT[word] }
=&gt; "all good girl does well"
</code></pre>

blocks|key|180797|text|subs+=+{+"every"+=>+"all",+"boy"+=>+"girl",+"fine"+=>+"well"+}
"every+good+boy+does+fine".gsub(/\w%2B/)+{+%7Cm%7C+subs[m]+%7C%7C+m+}
#+=>+'all+good+girl+does+well'|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|180798|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>subs = { "every" =&gt; "all", "boy" =&gt; "girl", "fine" =&gt; "well" }
"every good boy does fine".gsub(/\w+/) { |m| subs[m] || m }
# =&gt; 'all good girl does well'
</code></pre>

blocks|key|4687017|text|只需执行以下操作：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4687018|“每个好男孩都做得很好”.gsub(/\w%2B/，'every‘=>’=>‘，'+boy’=>‘=>’，'fine‘=>’=>‘)|4687019|更容易阅读:)这里对这个简单问题的一些答案真的让我wonder...lol|4687020|这里有一个参考：http://ruby-doc.org/core-2.1.4/String.html|offset|length|4687021|gg|4687022|entityMap|0|LINK|mutability|MUTABLE|url|http://ruby-doc.org/core-2.1.4/String.html^0|0|0|0|8|16|0|0|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|U|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|V|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|W|8|@]|9|@$H|X|I|Y|1|Z]]|A|$]]|$1|J|3|K|5|6|7|10|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S]]]]

just do this:

"every good boy does fine".gsub(/\w+/, 'every' => 'all', 'boy' => 'girl', 'fine' => 'well')

a lot easier to read :)
some of the answers here to this simple question really make me wonder...lol

here's the reference:
<a href="http://ruby-doc.org/core-2.1.4/String.html" rel="nofollow noreferrer">http://ruby-doc.org/core-2.1.4/String.html</a>

gg

Using Ruby 1.9.3, Rails 3.2, I have the following:

<pre><code>"every good boy does fine".gsub("every", "all").gsub("boy", "girl").gsub("fine", "well")
# =&gt; "all good girl does well"
</code></pre>

Is there a better way to write this? Thanks.

Ruby gsub multiple characters in string

使用Ruby 1.9.3，Rails 3.2，我有以下几点："every good boy does fine".gsub("every", "all").gsub("boy", "girl").gsub("fine", "well")# => "all good girl does well"有没有更好的方法来写这篇...

问Ruby gsub字符串中的多个字符
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