zoukankan      html  css  js  c++  java
  • split

    [split]

    1. str.split([sep[maxsplit]])

    Return a list of the words in the string, using sep as the delimiter string. If maxsplit is given, at most maxsplit splits are done (thus, the list will have at most maxsplit+1 elements). If maxsplit is not specified or -1, then there is no limit on the number of splits (all possible splits are made).

    If sep is given, consecutive delimiters are not grouped together and are deemed to delimit empty strings (for example, '1,,2'.split(',') returns ['1', '', '2']). The sep argument may consist of multiple characters (for example,'1<>2<>3'.split('<>') returns ['1', '2', '3']). Splitting an empty string with a specified separator returns [''].

    If sep is not specified or is None, a different splitting algorithm is applied: runs of consecutive whitespace are regarded as a single separator, and the result will contain no empty strings at the start or end if the string has leading or trailing whitespace. Consequently, splitting an empty string or a string consisting of just whitespace with a None separator returns [].

    For example, ' 1  2   3  '.split() returns ['1', '2', '3'], and '  1  2   3  '.split(None, 1) returns ['1', '2   3  '].

    2. 注意的要点:

      1) str.split() 与str.split(' ') 是不一样的, 不指定sep的会归并連续的空格

      2) 当使用显示sep时, 字符串头的sep和尾部的sep分别会产生一个空字符串项

    3. 实例代码:

      

     运行結果:

      

     4. awk 用-F指定sep与不指定sep的我与此类似

  • 相关阅读:
    二级JAVA考证笔记
    JAVA异常处理机制
    notepad++安装nppFTP
    nginx conf_ctx ****
    ngx_string()错误分析
    nginx
    char *p[] 和char**的思考
    LeetCode.接雨水
    LeetCode.atoi
    LeetCode.数字转罗马数字
  • 原文地址:https://www.cnblogs.com/tekkaman/p/3343184.html
Copyright © 2011-2022 走看看