Ruby 和 Python3 的字符串操作比较

本来是想写到学习笔记一块的，但是字符串操作这块的内容确实太多了，所以单独提取出来了。

Ruby 和 Python 两种语言都支持单引号和双引号的字符串。话不多说，直接上菜

字符串中嵌入变量

# Ruby
[1] pry(main)> name1 = "Joe"
=> "Joe"
[2] pry(main)> name2 = "Mary"
=> "Mary"
[3] pry(main)> puts "你好 #{name1},  #{name2} 在哪?"
你好 Joe,  Mary 在哪?
=> nil

# Python3
>>> name1 = "Joe"
>>> name2 = "Mary"
>>> print(f"你好 {name1}, {name2} 在哪？")
你好 Joe, Mary 在哪？

 字符串内建方法

# Ruby
[4] pry(main)> myStr = String.new("THIS IS TEST")
=> "THIS IS TEST"
[5] pry(main)> foo = myStr.downcase
=> "this is test"
[6] pry(main)>  
[7] pry(main)> puts "#{foo}"
this is test
=> nil
[8] pry(main)> 

# Python3
>>> myStr = str("THIS IS TEST")
>>> myStr
'THIS IS TEST'
>>> foo = myStr.lower()
>>> foo
'this is test'

str * 3

# Ruby
[9] pry(main)> aa = "hello world"
=> "hello world"
[10] pry(main)> aa * 3
=> "hello worldhello worldhello world"

# Python3
>>> aa = "hello world"
>>> aa * 3
'hello worldhello worldhello world'

str + other_str

# Ruby
[11] pry(main)> "hello" + " world"
=> "hello world"
[12] pry(main)> "hello" << " world"
=> "hello world"

# Python3
>>> "hello" + " world"
'hello world'

to be continued

# Ruby

# Python3