进程池
进程池 进程和进程之间没有关联，进程之间通信用Queue，进程池中进程通信用Manage().Queue()创建的队列进行通信 来源： CSDN 作者： like_study_cat 链接： https://blog.csdn.net/like_study_cat/article/details/103711895
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Reading an array from a file in bash - “not found” errors using cat
问题 I have a text file with a few basic words: -banana -mango -sleep When I run my script: #!/bin/sh WORD_FILE="testwoord.txt" WORDS_ARRAY=cat $WORD_FILE The output is like: /home/username/bin/testword.txt: 1 /home/username/bin/restword.txt: banana: not found /home/username/bin/testword.txt: 1 /home/username/bin/restword.txt: mango: not found /home/username/bin/testword.txt: 1 /home/username/bin/restword.txt: sleep: not found Why is it doing this? What I actually want is a script that reads words
php无限极分类以及递归(thinkphp)
php无限极分类: 无限极分类重点在于表的设计: 1在model中: class CatModel extends Model{ protected $cat = array(); public function __construct(){ parent::__construct(); $this->cats = $this->select(); } public function getTree($parent_id=0,$lev=0){ $tree = array(); foreach($this->cats as $c){ if ($c['parent_id'] == $parent_id) { $c['lev'] = $lev; $tree[] = $c; //再查出下层的目录拼接到一起去 $tree = array_merge($tree,$this->getTree($c['cat_id'] , $lev+1)); } } return $tree; } } 2在controller中: class GoodsController extends Controller{ public function catelist(){ $catModel = D('Cat'); $catlist = $catModel->getTree(); //print_r(
java.lang.Runtime exception “Cannot run program”
问题 I am getting an exception like java.io.IOException: Cannot run program cat /home/talha/* | grep -c TEXT_TO_SEARCH": error=2, No such file or directory while executing the command below despite that there are no issues when I execute the same command through the terminal. I need to execute and return the output of the command below: cat /home/talha/* | grep -c TEXT_TO_SEARCH Here is the method used to execute commands using Runtime class: public static String executeCommand(String command) {
内部类练习题（外部类访问内部类成员、内部类访问外部类成员、顶级类访问内部类成员）
package com.Summer_0429.cn; /** * @author Summer * 内部类实例： * 定义一只猫类，猫有： * 1、重量 * 2、猫的身体： * 1）颜色 * 2）显示猫的身体的信息（）； * 3、显示猫的整体信息（）； * 要求：创建一只小猫，显示它的整体信息。 * */ class Cat{ private double weight; public Cat(double weight){ this.weight = weight; } //内部类：成员内部类 class CatBody{ private String color; public CatBody(String color) { this.color = color; } public void show(){ //内部类中可以直接访问外部类的成员 //每一个内部类对象中都会隐藏一个外部类对象，外部类.this //System.out.println("颜色："+color+Cat.this.weight); System.out.println("颜色："+color+weight); } } public void display(){//外部类 //外部类，访问内部类的成员 CatBody body = new CatBody("白色"); body.show();
Using cat and execvp
问题 Trying to understand why this section of code using the cat command isn't working with execvp in C. char *in[5] ={"cat", "file1.txt", ">>", "file2.txt", 0}; execvp(in[0], in); When I run it displays the contents of file1.txt but then says: cat: >> No such file or directory. Then displays the contents of file2.txt Why wouldn't it recognize the >> operator in this instance? 回答1: You can read the "man tee" command which it read from standard input and write to standard output and files. You
Unwanted empty lines using echo and cat [duplicate]
问题 This question already has answers here : Unwanted line break using echo and cat (3 answers) How to insert a text at the beginning of a file? (15 answers) Closed 5 years ago . I want to add a line to the beginning of a text file. I have input.txt: line1 line2 line3 and want to add the line 'time/F:x1:x2' to end up with time/F:x1:x2 line1 line2 line3 I'm trying to do this with echo 'time/F:x1:x2' | cat - input.txt>output.txt but what I get is time/F:x1:x2 line1 line2 line3 that is, I get empty
Merging files (cat) in each-folder Unix
问题 Inside my main folder, I have multiple sub-folders and each sub folder contains multiple files. I want to merge these files in every sub-folder. So I am trying to do something like this: cd ../master-folder for file in $( find . -name "*.txt" ); do cat "all the text files in this sub folder" > "name of the subfolder.txt" rm "all the previous text files excluding the merged output obviously" done Appreciate the help! Thank you. 回答1: I would do it like this, if the order of the files doesn't
Append file A.txt to file B.txt located in all subdirectories in linux command line [closed]
- 阅读更多 关于 Append file A.txt to file B.txt located in all subdirectories in linux command line [closed]
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 11 days ago . How to go through all files in the current directory and append file A.txt to file B.txt by Linux command line? File A.txt is located in the current directory. File B.txt is located multiple times in all subdirectories in the current directory. If I wanted to do it only once, I can do '''cat A.txt >> B.txt'''
CentOS日常维护及常用脚本
[root@192-16.x.x xiewenming]# curl myip.ipip.net 当前 IP：42.62.x.x 来自于：中国 北京 北京 联通/电信 www.17ce.com cdn解析网站测试 如果遇到 -bash: warning: setlocale: LC_CTYPE: cannot change locale (UTF-8): No such file or directory，解决办法如下： vi /etc/environment add these lines... LANG=en_US.utf-8 LC_ALL=en_US.utf-8 结束php进程，主进程除外 ps -ef|grep php|grep -v grep|cut -c 9-15|xargs kill -9 用指定用户执行脚本或命令 su - tomcat -c /usr/local/tomcat/bin/startup.sh 切换root执行 sudo sh tomcat.sh start 查查哪个目录的inode节点使用的多 [root@opt]# df -i Filesystem Inodes IUsed IFree IUse% Mounted on /dev/vda2 576K 497K 80K 87% / tmpfs 235K 5 235K 1% /dev/shm [root