for var1 in list1 do for var2 in list2 do # 在这里执行循环体的操作 done done 其中,list1和list2分别表示需要遍历的两个列表,var1和var2是循环变量,可以在循环体中使用。在循环体中,可以执行相应的操作,例如打印输出、文件处理、调用其他命令等。 这种一次两个for循环的结构可以用于处理多维数据结构、嵌...
, #{it.pwd}, #{it.nickName}, #{it.avatar},now(),now()) foreach...> foreach相当于执行力java的for循环,他的属性: collection指定集合的上下文参数名称比如这里的@Param("list") item指定遍历的每一个数据的变量...id="findByIds" resultMap="userResultMap"> select * from user id in foreach...
{registerinti, len;char*result;intsize, offset;char**list;/* XXX - think about making history_tokenize return a struct array, each struct in array being a string and a length to avoid the calls to strlen below. */if((list= history_tokenize (string)) ==NULL)return((char*)NULL);for(...
command:命令 publicstaticvoidCreateBash(intbashCount, List<string> command) {try{vardata = Convert.ToInt32(Math.Ceiling((double)command.Count /bashCount)); Parallel.For(0, bashCount, (i) =>{ Process p=newProcess();//设置要启动的应用程序p.StartInfo.FileName ="bash";//是否使用操作系统she...
数组中用于遍历的方法 一,for循环语法:for(let ; ; )二,for in:常用与遍历对象语法:for( let i in obj)三,forEach()作用:调用数组中的每个元素,并将元素传递给回调函数进行执行,无返回值。语法:array.forEach(function(currentValue, index, arr));四,for of:用于遍历值语法:for (var swift 数组遍历...
(as in chmod), not a=rwx - umask -p, --parents no error if existing, make parent directories as needed -v, --verbose print a message for each created directory -Z set SELinux security context of each created directory to the default type --context[=CTX] like -Z, or if CTX is ...
In this example find command returns the list of files, from which each file will be processed through a loop. For each item, it creates the directory with the name of the zip file, and copies the zip file to the newly created directory and unzip the zip file from there. ...
如果目录很多,推荐队列方式,递归方式会慢,慢的原因:递归的实现是通过调用函数本身,函数调用的时候,每次调用时要做地址保存,参数传递等<?php//递归方式function read_dir($dir){ $files=array(); $dir_list=scandir($dir); foreach($dir_list as $file){ if($file!='..' && $ ...
What is a difference between traditional loop and for-each loop? I wonder if there is a difference between these: 1-) 2-) If there is not any difference which one is more common or efficient? Traditional loop allows to modify the list, e.g.: you can add extra eleme... ...
After each iteration of the loop, expr3 is evaluated. This is usually used to increment a loop counter. The following 12 examples shows how to bash for loops in different ways. 1. Static values for the list after “in” keyword