Programmer Group

Preface Last time, after understanding the basic grammar of cljs and the strange error prompt of clojurescript.net, we must painfully build a local development environment for further study of cljs. Existing build tools Because browsers can only run JS, but can not run cljs directly, we need to build a precompiled environment to compile cljs in ...

wildcard Wildcard: * Matches zero or more characters. That is to say, "Anything is OK". Example: / etc/g* matches all files in / etc that begin with G. / tmp/my*1 starts with my in / tmp and matches all files ending with 1. Wildcard character: uuuuuuuuuuuu Matches any single character. Example: Myfile? Matches with any file nam ...

Usually the process of executing commands in shell is that the bash process creates a subprocess, and then the subprocess process process is replaced by the executable command file. 1. mybash function: the format of output information is: [user name @ host name in the file]$(root user: [user name @ host name in the file]. Display "~&quot ...

for cycle Syntax: for variable name in condition; do... ; done Case 1 1+2+3. +100 and When sum is first used as a variable, it is 0; when it enters the for loop, every operation changes the sum variable until the end of $i; the final output is $sum. In addition and subtraction, [] there is no need to add spaces in squa ...

1. The last article introduced the basis of Redis and provided two ways to start it. Here we summarize the following: Write shell script and run shell script. See the end of the last article for details. ②[root@localhost ~]# cd /usr/local/redis/ [root@localhost redis]# ./bin/redis-server ./redis.conf Check whether the start ...

Realization of Explosion EffectWhen an airplane is hit by an artillery shell, it needs an explosive effect to make our picture more exciting. Explosive effects are also common in game development.We define the Exlode class to represent the information of the explosion. The difference between the explosion class and the ordinary class is that it ...

The Python Tutorial#Virtual Environments and Packages 12.1 Introduction Python applications often use packages and modules that do not belong to standard libraries. Sometimes an application needs a specific version of the library, because the application may need a library with a specific bug to be fixed, or an application depends on an obsolet ...

Problem description More and more intelligent devices are using Firefly's development board. http://dev.t-firefly.com/forum.php Sometimes android application development must obtain root privileges (such as restarting devices, silently updating apps). Generally, manufacturers will provide ways to obtain root privileges, but th ...

Reprinted from: http://www.taskctl.com/forum/detail_129.html The last time I wrote a post TASKCTL, I did not use proxy to execute remote script configuration (SSH plug-in extension) through SSH secret-free connection. http://www.taskctl.com/forum/detail_122.html  . After writing, it is found that it is possible to modify the original ...