2019-11-26 11:05:10 1096. Brace Expansion II 问题描述: 问题求解: 经典的字符串扩展问题. 一般来说这种问题有两种解法,一个是采用stack,一个是采用recursive.事实证明,这种题目采用recursive在时间效率和程序易读性上要远远高于stack,请尽量采用recursive. 本题有个很好的讲解视频:https://www.youtube.com/watch?v=blXuT7DOMwU public List<String> brace…

原题链接在这里:https://leetcode.com/problems/brace-expansion/ 题目: A string S represents a list of words. Each letter in the word has 1 or more options.  If there is one option, the letter is represented as is.  If there is more than one option, then curly b…

# Title Solution Acceptance Difficulty Frequency     4 Median of Two Sorted Arrays       27.2% Hard     10 Regular Expression Matching       25.6% Hard     23 Merge k Sorted Lists       35.8% Hard     25 Reverse Nodes in k-Group       37.7% Hard    …

读取文件,显示行号 nl -a.txt brace expansion 花括号扩展 echo a{A{1,2},B{3,4}}b mkdir {2009...2011}-0{1...9} {2009...2011}-{10...12} mkdir {2009..2011}-0{1..9} {2009..2011}-{10..12} $ echo this is echo this is echo $ echo * 当前目录下所有文件名 rename Rename SOURCE to DEST,…

http://linux.about.com/library/cmd/blcmdl1_sh.htm http://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html Linux / Unix Command: shCommand LibraryNAMEbash - GNU Bourne-Again SHell SYNOPSISbash [options] [file] DESCRIPTIONBash is an sh…

LAST UPDATE:     1 Dec 15, 2016 APPLIES TO:     1 2 3 4 Oracle Database - Enterprise Edition - Version 7.0.16.0 and later Oracle Database - Standard Edition - Version 7.0.16.0 and later Oracle Database - Personal Edition - Version 7.1.4.0 and later I…

第三章 CentOS基础了解... 36 第一节 语言编码.终端... 36 I 查看语言编码... 36 II Tty?.pts/?. 36 第二节 bash/sh command. 38 I 查找... 39 II 进程... 41 III tar - cz压缩xC解压tv查看... 42 第一节 环境配置文件... 44 I 配置文件... 44 II su切换用户... 45 III 登录模式... 45 第二节 shell 47 I 命令的优先级... 48 II 别名... 48 I…

BASH(1) General Commands Manual BASH(1) NAME bash - GNU Bourne-Again SHell SYNOPSIS bash [options] [command_string | file] COPYRIGHT Bash is Copyright (C) 1989-2013 by the Free Software Foundation, Inc. DESCRIPTION Bash is an sh-compatible command la…

Bash Reference Manual a.summary-letter { text-decoration: none } blockquote.indentedblock { margin-right: 0 } blockquote.smallindentedblock { margin-right: 0; font-size: smaller } blockquote.smallquotation { font-size: smaller } div.display { margin-…

我们知道,在 Shell 中,一个变量在被展开后,如果它没有被双引号包围起来,那么它展开后的值还会进行一次分词(word splitting,或者叫拆词,分词这个术语已经被搜索引擎相关技术占用了)操作,分成几个词,传给命令的就是几个单独的参数. 举个例子,比如: $ foo="1 2 3" $ how_many_args() { echo $#; } $ how_many_args $foo 3 $ how_many_args "$foo" 1 但是当这个变量出现在…