剥去特定控制字符的ruby字符串

时间:2012-04-05 00:02:22

标签: ruby

这很简单:如何删除特殊字符的ruby字符串?这是角色: http://www.fileformat.info/info/unicode/char/2028/index.htm

这是字符串,句点和结尾引号之间有两个特殊字符:

"Each of the levels requires logic, skill, and brute force to crush the enemy.

"

我没试过这个:

string.gsub!(/[\x00-\x1F\x7F]/, '')

gsub("/\n/", "")

我正在使用ruby 1.9.3p125

2 个答案:

答案 0 :(得分:6)

String#gsub会有效,但比String#tr

更通用且效率更低
irb> s ="Hello,\u2028 World; here's some ctrl [\1\2\3\4\5\6] chars"
=> "Hello,\u2028 World; here's some ctrl [\u0001\u0002\u0003\u0004\u0005\u0006] chars"

irb> s.tr("\u0000-\u001f\u007f\u2028",'')
=> "Hello, World; here's some ctrl [] chars"

require 'benchmark'
Benchmark.bm {|x|
  x.report('tr')   { 1_000_000.times{ s.tr("\u0000-\u001f\u007f\u2028",'') } }
  x.report('gsub') { 1_000_000.times{ s.gsub(/[\0-\x1f\x7f\u2028]/,'') } }
}

          user     system      total        real
tr    1.440000   0.000000   1.440000 (  1.448090)
gsub  4.110000   0.000000   4.110000 (  4.127100)

答案 1 :(得分:1)

我明白了! .gsub(/\u2028/, '')