cat

1 <?php 2 define('CON','姑姑');//定义一个常量 3 if(defined('CON')){ 4 echo CON; 5 } else { 6 echo 'no fund'; 7 } 8 echo "<br/>"; 9 10 // PHP 7 起就可以运行了 11 define('ANIMALS', array( 12 'dog', 13 'cat', 14 'bird' 15 )); 16 echo ANIMALS[1]; // 输出 "cat" 来源： https://www.cnblogs.com/clubs/p/11634145.html

i got some files with name start as eg_. and only each contains one single line eg_01.txt: @china:129.00 eg_02.txt @uk:219.98 eg_03.txt @USA:341.90 ...... i am expecting to cat them in to a single line to send by URL like: @china:129.00@uk:219.98@USA:341.90 i use echo cat eg_* it give me the output look like a string, but it actually contains new line: "@china:129.00 @uk:219.98 @USA:341.90" is there any other way i can construct that string which expected and get rid of new line and even the space? is only cat enough to do this? thanks in advance You could always pipe it to tr tr "\n" " " That

     标准IO和管道实验练习 【例1】把/etc/fstab文件内容重定向到/tmp目录下文件名为fstab.out 写法： 13:54:35 root@centos ~]#cat /etc/fstab > /tmp/fstab.out [13:55:02 root@centos ~]#cat /tmp/fstab.out # # /etc/fstab # Created by anaconda on Fri Sep 20 14:23:49 2019 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # UUID=b7becd8b-fb18-48cf-810b-953944dcf82e / xfs defaults 0 0 UUID=a74c9411-1dd4-44ff-929d-ba505baaec2c /boot xfs defaults 0 0 UUID=cc79eddd-a461-46e9-96ab-3489b7de0db3 /data xfs defaults 0 0 UUID=23047094-ac08-4c27

On Unix I would do something like: cat > file.txt How can I do this on the Windows command prompt or batch file? EDIT: Basically, I am looking for the functionality of cat with no arguments (it reads from stdin and spits it back out to stdout). Mark K Cowan TYPE CON CON is the MS-DOS device for console input. You can redirect to a file as follows: TYPE CON>output.txt To terminate, hit Ctrl + C or Ctrl + Z , Enter ( Ctrl + Z = EOF). If all you want is to read stdin and write what you read to stdout, then FINDSTR may work, depending on how you use it. FINDSTR will output an exact binary image of

描述 913. Cat and Mouse Hard A game on an undirected graph is played by two players, Mouse and Cat, who alternate turns. The graph is given as follows: graph[a] is a list of all nodes b such that ab is an edge of the graph. Mouse starts at node 1 and goes first, Cat starts at node 2 and goes second, and there is a Hole at node 0. During each player's turn, they must travel along one edge of the graph that meets where they are. For example, if the Mouse is at node 1 , it must travel to any node in graph[1] . Additionally, it is not allowed for the Cat to travel to the Hole (node 0.) Then, the

Pytorch自定义Dataset 1. 自定义加载数据 1.1. 第一种 Dataset class 1.2. 第二种 torchvision 1. 自定义加载数据 在学习Pytorch的教程时，加载数据许多时候都是直接调用 torchvision.datasets 里面集成的数据集，直接在线下载，然后使用 torch.utils.data.DataLoader 进行加载。 那么，我们怎么使用我们自己的数据集，然后用 DataLoader 进行加载呢？ 常见的两种形式的导入： 一种是整个数据集都在一个文件下，内部再另附一个label文件，说明每个文件的状态。这种存放数据的方式可能更时候在非分类问题上得到应用。 一种则是更适合在分类问题上，即把不同种类的数据分为不同的文件夹存放起来。这样，我们可以从文件夹或文件名得到label。 我们以猫狗数据集为例，进行自定义加载数据。 猫狗数据集里面有两个文件夹，分别是test和train。 其中train文件夹下的图片，命名方式为：cat.0.jpg或dog.0.jpg。我们可以从文件名中提取出来作为我们的图片标签。 1.1. 第一种 Dataset class 这种方法是官方导航介绍的。 torch.utils.data.Dataset 是一个抽象类，用户想要加载自定义的数据只需要继承这个类，并且覆写其中的两个方法即可： __len__