Ruby-1

2023-08-28 12:05:22

Ruby API 文档 http://www.ruby-doc.org/core-2.0.0/
Programming Ruby http://ishare.iask.sina.com.cn/f/22783772.html

替换字符串某一部分的方法

puts "hello".sub(/l/, '*')

puts "hello".gsub(/l/, '*')

puts "hello".sub(/lll/, '*')

puts "hello".gsub(/lll/, '*')    #return itself if no gsub

puts "hello".sub!(/lll/, '*')

puts "hello".gsub!(/lll/, '*')    #return nil if no gsub

sleep 10

正则表达式 http://www.ruby-doc.org/core-2.0.0/Regexp.html
- 　　Regexps are created using the /.../ and %r{...} literals, and by theRegexp::new constructor.
区间 http://www.ruby-doc.org/core-2.0.0/Range.html　　　
- 　　Ranges may be constructed using the s..e and s...e literals, or with ::new.
打印字符串　　　
```
puts "hello"
```