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The meaning of the shell variable $ #, $ @, $0, $1, $2 in linuxVariable description $ shell's PID (processID) $! Background ProcessID $? End code of the last command (Return Value) $-Flag list Set using the Set command $ * List of all parameters. For example, if "$ *" is enclosed by "$1 $2 $3... $ n", all parameters ar

interface function shown is a specific five functions, it is basically COM (do not exclude some ordinary DLL implementation of these functions may be):1) DllMain: entry function, complete some DLL initialization work (DirectShow implementation is dllentrypoint);2) DllGetClassObject: Used to obtain the class factory pointer;3) DllCanUnloadNow: This function is called when the system is idle to determine whether the DLL can be unloaded;4) DllRegisterSe

Tags: number let [email protected] syn ber guide div lsp harExcerpt from: Abs_guide: http://www.tldp.org/LDP/abs/abs-guide.pdf The meaning of shell variable $#,[email protected],$0,$1,$2 in Linux is explained:Variable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance usi

Excerpt from: Abs_guide: http://www.tldp.org/LDP/abs/abs-guide.pdf The meaning of shell variable $#,[email protected],$0,$1,$2 in Linux is explained:Variable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance using the SET command$*All parameter lists. such as "$*" in the

Variable Description:$$ Shell本身的PID（ProcessID） $! Shell最后运行的后台Process的PID $? 最后运行的命令的结束代码（返回值） $- 使用Set命令设定的Flag一览 $* 所有参数列表。如"$*"用「"」括起来的情况、以"$1 $2 … $n"的形式输出所有参数。 [emailprotected] 所有参数列表。如"[emailprotected]"用「"」括起来的情况、以"$1" "$2" … "$n" 的形式输出所有参数。 $# 添加到Shell的参数个数 $0 Shell本身的文件名 $1～$n

The meaning of shell variable $#,[email protected],$0,$1,$2 in Linux is explained:Variable Description:$$The PID of the shell itself (ProcessID)$!PID of the Shell's last running background process$?End code of the last Run command (return value)$-Flag at a glance using the SET command$*All parameter lists. such as "$*" in the Case of "" ", in the form of" $ $ ... $n "output all parameters.[Email protected]A

the form "$n".$#Number of arguments added to the shellThe file name of the shell itself$1~ $nEach parameter value added to the shell. $ $ is the 1th parameter, and the $ = is the 2nd parameter ....Example:1 #!/bin/bash2 #3 printf"The complete list is %s\n""$$"4 printf"The complete list is %s\n""$!"5 printf"The complete list is %s\n""$?"6 printf"The complete list is %s\n""$*"7 printf"The complete list is %s\n" "[emailprotected]"8 printf"The complete l

Zookeeper Some time ago cocos2dx updated the latest version of cocos2d-2.0-x-2.0.2, but also from this version has changed the policy for resource loading and management. In the previous loading method is to follow the same way to load resources as cocos2d-iphone, for the image name after adding-HD,-iPad,-ipadhd, after you enable the project's HD retina, you can find the corresponding resources by default. But from the cocos2d-2.0-x-2.0.2 version, the Resource load policy does not. For more inf

Variable Description: $$the PID of the shell itself (ProcessID) $!PID of the Shell's last running background process $?end code of the last Run command (return value) $-flag at a glance using the SET command $*all parameter lists.such as "$*" in the Case of "" ", in the form of" $ $ ... $n "output all parameters. [email protected]all parameter lists. such as "[email protected]" with "" "in the case, with" $ "" $ "...All parameters are output in the form "$n". $#number of arguments added to the

Cases The code is as follows Copy Code $test = 0;if ($test = = ") {Echo ' }if ($test = = = ") {Echo ' }if ($test ==null) {Echo ' }if ($test ===null) {Echo ' }if ($test ==false) {Echo ' }if ($test ===false) {Echo ' }?> The reason is that in PHP, variables are stored in C-language structures, empty strings and null,false are all stored with a value of 0, where the struct

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