Rubyコードの最適化
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The document shows code that is counting the occurrences of spaces in a CSV file. It opens the file, reads each line, uses a regular expression to check for spaces, and increments a count for each unique space found. It then sorts and prints the final counts.
![FNAME = "KEN_ALL.CSV"
count = []
File.open(FNAME, "r:SJIS:UTF-8") do |f|
while line = f.gets
next unless line =~ /[ ]/
c = count.find{|a| a.first == Regexp.last_match[0] }
unless c
c = [Regexp.last_match[0], []]
count.push c
end
c[1] << line
end
end
p count
.sort{|a, b| a.last.length <=> b.last.length }
.map{|k, v| [k, v.length] }
#=> [[" ", 8079], [" ", 8392], [" ", 11271], [" ",
15017]]](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-15-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = []
File.open(FNAME, "r:SJIS:UTF-8") do |f|
while line = f.gets
next unless line =~ /[ ]/
c = count.find{|a| a.first == Regexp.last_match[0] }
unless c
c = [Regexp.last_match[0], []]
count.push c
end
c[1] << line
end
end
p count
.sort{|a, b| a.last.length <=> b.last.length }
.map{|k, v| [k, v.length] }
#=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ",
15017]]](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-17-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = []
body = nil
File.read(FNAME, “r:SJIS:UTF-8"){|f|
body = f.read
end
body.each_line do |line|
next unless line =~ /[ ]/
c = count.find{|a| a.first == Regexp.last_match[0] }
unless c
c = [Regexp.last_match[0], []]
count.push c
end
c[1] << line
end
p count
.sort{|a, b| a.last.length <=> b.last.length }
.map{|k, v| [k, v.length] }
#=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ",](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-18-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = []
body = nil
File.read(FNAME, “r:SJIS:UTF-8"){|f|
body = f.read
end
body.each_line do |line|
next unless line =~ /[ ]/
c = count.find{|a| a.first == Regexp.last_match[0] }
unless c
c = [Regexp.last_match[0], []]
count.push c
end
c[1] << line
end
p count
.sort{|a, b| a.last.length <=> b.last.length }
.map{|k, v| [k, v.length] }
#=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ",
15017]]](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-19-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
body.each_line do |line|
next unless line =~ /[ ]/
count[Regexp.last_match[0]] ||= []
count[Regexp.last_match[0]] << line
end
p count
.sort{|a, b| a.last.length <=> b.last.length }
.map{|k, v| [k, v.length] }
#=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ",
15017]]](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-20-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
body.each_line do |line|
next unless line =~ /[ ]/
count[Regexp.last_match[0]] ||= []
count[Regexp.last_match[0]] << line
end
p count
.sort{|a, b| a.last.length <=> b.last.length }
.map{|k, v| [k, v.length] }
#=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ",
15017]]](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-21-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
body.each_line do |line|
next unless line =~ /[ ]/
count[Regexp.last_match[0]] ||= 0
count[Regexp.last_match[0]] += 1
end
p count
.sort{|a, b| a.last <=> b.last }](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-22-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
body.each_line do |line|
next unless line =~ /[ ]/
count[Regexp.last_match[0]] ||= 0
count[Regexp.last_match[0]] += 1
end
p count
.sort{|a, b| a.last <=> b.last }](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-23-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
reg = /[ ]/
body.each_line do |line|
next unless line =~ reg
count[Regexp.last_match[0]] ||= 0
count[Regexp.last_match[0]] += 1
end
p count
.sort{|a, b| a.last <=> b.last }](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-24-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
reg = /[ ]/
body.each_line do |line|
next unless line =~ reg
count[Regexp.last_match[0]] ||= 0
count[Regexp.last_match[0]] += 1
end
p count
.sort{|a, b| a.last <=> b.last }](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-25-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
reg = /[ ]/
body.each_line do |line|
next unless line =~ reg
k = Regexp.last_match[0]
count[k] ||= 0
count[k] += 1
end
p count
.sort{|a, b| a.last <=> b.last }](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-26-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {}
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
reg = /[ ]/
body.each_line do |line|
next unless line =~ reg
k = Regexp.last_match[0]
count[k] ||= 0
count[k] += 1
end
p count
.sort{|a, b| a.last <=> b.last }](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-27-320.jpg)
![FNAME = "KEN_ALL.CSV"
count = {” ” => 0}
count = Hash.new { 0 }
body = nil
File.open(FNAME, "r:SJIS:UTF-8") do
|f| body = f.read
end
reg = /[ ]/
body.each_line do |line|
next unless line =~ reg
k = Regexp.last_match[0]
count[k] ||= 0
count[k] += 1
end
p count.sort_by{|k, v| v }](https://image.slidesharecdn.com/ruby-170304053946/85/Ruby-28-320.jpg)
Rubyコードの最適化
- 15. FNAME = "KEN_ALL.CSV" count = [] File.open(FNAME, "r:SJIS:UTF-8") do |f| while line = f.gets next unless line =~ /[ ]/ c = count.find{|a| a.first == Regexp.last_match[0] } unless c c = [Regexp.last_match[0], []] count.push c end c[1] << line end end p count .sort{|a, b| a.last.length <=> b.last.length } .map{|k, v| [k, v.length] } #=> [[" ", 8079], [" ", 8392], [" ", 11271], [" ", 15017]]
- 17. FNAME = "KEN_ALL.CSV" count = [] File.open(FNAME, "r:SJIS:UTF-8") do |f| while line = f.gets next unless line =~ /[ ]/ c = count.find{|a| a.first == Regexp.last_match[0] } unless c c = [Regexp.last_match[0], []] count.push c end c[1] << line end end p count .sort{|a, b| a.last.length <=> b.last.length } .map{|k, v| [k, v.length] } #=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ", 15017]]
- 18. FNAME = "KEN_ALL.CSV" count = [] body = nil File.read(FNAME, “r:SJIS:UTF-8"){|f| body = f.read end body.each_line do |line| next unless line =~ /[ ]/ c = count.find{|a| a.first == Regexp.last_match[0] } unless c c = [Regexp.last_match[0], []] count.push c end c[1] << line end p count .sort{|a, b| a.last.length <=> b.last.length } .map{|k, v| [k, v.length] } #=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ",
- 19. FNAME = "KEN_ALL.CSV" count = [] body = nil File.read(FNAME, “r:SJIS:UTF-8"){|f| body = f.read end body.each_line do |line| next unless line =~ /[ ]/ c = count.find{|a| a.first == Regexp.last_match[0] } unless c c = [Regexp.last_match[0], []] count.push c end c[1] << line end p count .sort{|a, b| a.last.length <=> b.last.length } .map{|k, v| [k, v.length] } #=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ", 15017]]
- 20. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end body.each_line do |line| next unless line =~ /[ ]/ count[Regexp.last_match[0]] ||= [] count[Regexp.last_match[0]] << line end p count .sort{|a, b| a.last.length <=> b.last.length } .map{|k, v| [k, v.length] } #=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ", 15017]]
- 21. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end body.each_line do |line| next unless line =~ /[ ]/ count[Regexp.last_match[0]] ||= [] count[Regexp.last_match[0]] << line end p count .sort{|a, b| a.last.length <=> b.last.length } .map{|k, v| [k, v.length] } #=>[[" ", 8079], [" ", 8392], [" ", 11271], [" ", 15017]]
- 22. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end body.each_line do |line| next unless line =~ /[ ]/ count[Regexp.last_match[0]] ||= 0 count[Regexp.last_match[0]] += 1 end p count .sort{|a, b| a.last <=> b.last }
- 23. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end body.each_line do |line| next unless line =~ /[ ]/ count[Regexp.last_match[0]] ||= 0 count[Regexp.last_match[0]] += 1 end p count .sort{|a, b| a.last <=> b.last }
- 24. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end reg = /[ ]/ body.each_line do |line| next unless line =~ reg count[Regexp.last_match[0]] ||= 0 count[Regexp.last_match[0]] += 1 end p count .sort{|a, b| a.last <=> b.last }
- 25. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end reg = /[ ]/ body.each_line do |line| next unless line =~ reg count[Regexp.last_match[0]] ||= 0 count[Regexp.last_match[0]] += 1 end p count .sort{|a, b| a.last <=> b.last }
- 26. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end reg = /[ ]/ body.each_line do |line| next unless line =~ reg k = Regexp.last_match[0] count[k] ||= 0 count[k] += 1 end p count .sort{|a, b| a.last <=> b.last }
- 27. FNAME = "KEN_ALL.CSV" count = {} body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end reg = /[ ]/ body.each_line do |line| next unless line =~ reg k = Regexp.last_match[0] count[k] ||= 0 count[k] += 1 end p count .sort{|a, b| a.last <=> b.last }
- 28. FNAME = "KEN_ALL.CSV" count = {” ” => 0} count = Hash.new { 0 } body = nil File.open(FNAME, "r:SJIS:UTF-8") do |f| body = f.read end reg = /[ ]/ body.each_line do |line| next unless line =~ reg k = Regexp.last_match[0] count[k] ||= 0 count[k] += 1 end p count.sort_by{|k, v| v }