strA="longstring"strB="string"result=$(echo$strA|grep"${strB}")if[["$result"!=""]]thenecho"包含"elseecho"不包含"fistrA="helloworld"strB="low"if[[$strA=~$strB]]...

 #!/bin/sha=`uname-a`b="Darwin"c="centos"d="ubuntu"if[[$a=~$b]];thenecho"mac"elif[[$a=~$c]];thenecho"centos"elif[[$a=~$d]];thenecho"ubuntu"elseecho$afi&nbs...

 test.sh#!/bin/bashread-p""aread-p""bif[$a-eq$b];thenecho"="elif[$a-gt$b];thenecho">"elif[$a-lt$b];thenecho"<"fi输出bogon:Desktopmacname$./test.sh26<...

 importos filename=r'/home/tim/workspace/test.txt'ifos.path.exists(filename):   message='OK,the"%s"fileexists.'else:   m...

 >>>importos>>>os.path.exists('d:/assist')True>>>os.path.exists('d:/assist/getTeacherList.py')True>>>os.path.isfile('d:...

 在一个二维数组中（每个一维数组的长度相同），每一行都按照从左到右递增的顺序排序，每一列都按照从上到下递增的顺序排序。请完成一个函数，输入这样的一个二维数组和一个整数，判断数组中是否含有该整数。deffind(target,array):i=0j=len(array[0])-1whilei<len(ar...

 importrandomval=0data=[5,6,7,8,9]whileval!=-1:find=Falseval=int(input('请输入查找键值(1-9)，输入-1离开：'))foriindata:ifi==val:print('在第%3d个位置找到键值[%3d]'%(i+1,i))find=T...

 code#coding=utf-8defgetdic(s):dic={}foriins:if(inotindic):dic[i]=1else:dic[i]+=1returndics1="csddc"s2="cdcsdsdwegtghyhjk"dics1=getdic(s1)length=len(s1)fla...

 ipv4importre#简单的匹配给定的字符串是否是ip地址,下面的例子它不是IPv4的地址，但是它满足正则表达式ifre.match(r"^(?:[0-9]{1,3}.){3}[0-9]{1,3}$","272.168,1,1"):print"IPvaild"else:print"IPinvaild"#...

 a=[1,2,4,2,4,5,7,10,5,5,7,8,9,0,3]a.sort()last=a[-1]foriinrange(len(a)-2,-1,-1):iflast==a[i]:dela[i]else:last=a[i]print(a) ...

 //vara="";//vara="";//vara=null;//vara=undefined;//vara=[];//vara={};//vara=NaN;if(a===undefined){//只能用===运算来测试某个值是否是未定义的console.log("为undefined");}if(a==...

 #include<iostream>usingnamespacestd;intmain(){charc;intisLowercaseVowel,isUppercaseVowel;cout<<"输入一个字母:";cin>>c;//小写字母元音isLowercaseVowel...

 /*isnanexample*/#include<stdio.h>/*printf*/#include<math.h>/*isnan,sqrt*/intmain(){printf("isnan(0.0):%d",isnan(0.0));printf("isnan(1.0/0.0):%...

 /*isinfexample*/#include<stdio.h>/*printf*/#include<math.h>/*isinf,sqrt*/intmain(){printf("isinf(0.0):%d",isinf(0.0));printf("isinf(1.0/0.0):%...

 /*isfiniteexample*/#include<stdio.h>/*printf*/#include<math.h>/*isfinite,sqrt*/intmain(){printf("isfinite(0.0):%d",isfinite(0.0));printf("isfi...