रूबी gsub स्ट्रिंग

Question

रूबी 1.9.3 का उपयोग में कई पात्रों, 3.2 रेल, मैं निम्नलिखित है:

"every good boy does fine".gsub("every", "all").gsub("boy", "girl").gsub("fine", "well") 
# => "all good girl does well" 

वहाँ एक बेहतर तरीका यह लिखने के लिए है? धन्यवाद।

Answer 1

String#gsub और Hash#fetch इसके लिए अच्छा विकल्प होगा।

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

या,

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

Answer 2

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

मुझे नहीं पता कि यह बेहतर है, लेकिन बहुत साफ है।

Answer 3

आशय विधि श्रृंखलन से बचने के लिए है:

[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)|(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 
=> "all good girl does well" 

वैकल्पिक रूप से:

[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)|(boy)|(fine)/) { |word| REPLACEMENT[word] } 
=> "all good girl does well" 

Answer 4

subs = { "every" => "all", "boy" => "girl", "fine" => "well" } 
"every good boy does fine".gsub(/\w+/) { |m| subs[m] || m } 
# => 'all good girl does well' 

Answer 5

बस यह करें:

"हर अच्छा लड़का ठीक करता है" .gsub (/ \ w + /, 'हर' => 'all', 'boy' => 'girl', 'fine' => 'well')

बहुत आसान को पढ़ने के लिए :) इस सरल प्रश्न के उत्तर यहां से कुछ वास्तव में मुझे सोचने पर मजबूर ... lol

यहां संदर्भ है: http://ruby-doc.org/core-2.1.4/String.html

gg