Thirdobj.name;
Console.log (Thirdobj.name); -> result is ' default '
Common errors Eight: Create an error guide for an instance method
Let's look at the following code:
var MyObject = function () {}
MyObject.prototype.whoAmI = function () {
Console.log (this = = window?) "Window": "MyObj"); };
var obj = new MyObject ();
Now for the sake of convenience, we create a new variable to direct the WhoAmI method, so we ca
.
PLAIN TEXT
CODE:
Class helper {Static function foo () {echo _ METHOD __;}}$ A = "helper ";$ B = "foo ";$ A: $ B (); // helper: fooLate Static BindingIf you do not know how to translate, it is easier to leave an original article. The timing of Event Processing for static methods has changed. Previously, events were handled during compilation and now events are processed during execution.
Before php 5.3, the following code will output A, but this is not what we need. the
Late bound/deferred binding of parent class and subclass in PHP
/****
Yan 18 Public welfare PHP Auditorium
Forum: http://www.zixue.it
Weibo: Http://weibo.com/Yshiba
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/***
= = = = Note Part = =
late binding/late binding
***/
class Human {
public static function WhoAmI () {
echo ' WhoAmI from the parent class is executing';
}
] Public voidNewandoverriderun () {Dog1 x=NewDog1 (); X.whoami (); //I am DOG1.((Animal) x). WhoAmI ();//I am Animal. //the new modified method invocation, depending on the type. } [Test] Public voidOverriderun () {Dog x=NewDog (); X.whoami ();//I am Dog. varX1 = x asAnimal; X1. WhoAmI ();//I am Dog. //method Invocation of the override modifier, depending on the type of instantiated object} [Test
(this = = window?) "Window": "MYOBJ"); }; var New MyObject ();Now for the sake of convenience, we create a new variable to guide the WhoAmI method, so we can directly use WhoAmI () instead of the longer obj.whoami ():var whoAmI = Obj.whoami;Next, to make sure everything is going as we predicted, we can print out the WhoAmI:Console.log (
Expressions ."
19. determine the current user
Sometimes you may want to determine whether a specific user has run your management script. To find out the answer, you can use the whoami command to return the name of the current user. Listing 13 shows the whoami command that runs independently; listing 14 shows an excerpt from the Bash script that uses whoami to e
Library. This is usually because the/etc/lD. So. conf and/etc/lD. So. cache files are inconsistent, or/etc/lD. So. cache is damaged. This error will not occur in glibc 2.3.2, And the LD-Linux bug may have been fixed.
In this case, LDD does not list the dynamic libraries that all programs depend on. The system calls dlopen to automatically call the required dynamic libraries as needed, which may not be listed by LDD. The NSS (name server switch) library, part of glibc, is a typical example. NSS
")4Response =os.popen (command). Read ()5 returnJsonify ({"result": Response})6 7 #This is an example of a flask function:8 """9 command is the inputTen can construct Http://127.0.0.1:5443/osinject?cmd=ping%20-c%205%20192.168.10.135|whoami One we can execute whoami. A """3, Code injection example:1 // www.local.com 2 /* 3 /codeinject/code.php4 http://www.local.com/codeinject/code.php?code=phpinfo
. ' ('. Implode (', ', $args). ') ';}}Helper::test ("foo", "Bar"); Test (Foo,bar)
Dynamic Invoke static method
Dynamic invocation of static methods? static and dynamic combination.
CODE:Class Helper {static function foo () {echo __method__;}}$a = "helper";$b = "Foo";$a:: $b (); Helper::foo
Late Static Binding
If you don't know how to translate it, you may be able to leave it easier to understand. The timing of event handling for static methods has changed, previously in compile-time processing,
not required to enter the normal user password, The system also does not verify the password. However, switching between ordinary users requires a password verification.
[Root@localhost ~]# Su–caoshenghuan #通过su命令切换到caoshenghuan用户下
[caoshenghuan@localhost ~] $whoami # Use the WhoAmI command to view
the current user Caoshenghuan
[caoshenghuan@localhost ~]$ su-bzu #这里是从caoshenghuan用户下切换到bzu用户下, yo
Class Human{public static function WhoAmI (){echo "WhoAmI from the parent class";}public static function Say (){Self::whoami ();//Sub-class without say, found the parent class}public static function Say2 (){Static::whoami ();}}Class Stu extends human{public static function WhoAmI
, and it is possible that the Ld-linux bug has been resolved.In spite of this, LDD does not list all the dynamic libraries that the program relies on, and the system calls Dlopen to automatically call into the required dynamic libraries when needed, and these libraries may not be listed by LDD. The NSS (Name Server Switch) library, as part of GLIBC, is a typical example of what NSS does to tell the application where to look for the System account database. The application is not connected direct
line with at least one letter $ grep '[a-zA-Z]' search-file.txt$ # Anything not a letter or number$ grep '[^a-zA-Z0-9] search-file.txt$ # Find phone numbers in the form 999-9999 $ grep '[0-9]\{3\}-[0-9]\{4\}' search-file.txt$ # Find lines with exactly one character$ grep '^.$' search-file.txt$ # Find any line that starts with a period "." $ grep '^\.' search-file.txt $ # Find lines that start with a "." and 2 lowercase letters$ grep '^\.[a-z][a-z]' search-file.txt
There are a large
addresses of the parent class and the Child class, in addition, the virtual function offset address of the subclass must be appended to the parent class virtual function offset address.That is to say, if there are two classes:Class {Private:Virtual void WhoAmI (){Cout }};Class B: public {Public:Void WhoAmIForB (){Cout }};Then, the instanceA;B B;Each has a vptr, where the vptr of a is (int *) (* (int *) ( a), and the vptr of B is (int *) (* (int *) (
inconsistent, or/etc/lD. So. cache is damaged. LD-li in glibc 2.3.2This Nux bug has been fixed.In this case, LDD does not list the dynamic libraries that all programs depend on. The system calls dlopen to automatically callDynamic library, which may not be listed by LDD. The NSS (name server switch) library is part of glibc.A typical example is that NSS is used to tell the application where to find the system account database. The application is not straightConnect to the NSS library, and glibc
dynamic libraries that the program relies on, and the system calls Dlopen to automatically call into the required dynamic libraries when needed, and these libraries may not be listed by LDD. The NSS (Name Server Switch) library, as part of GLIBC, is a typical example of what NSS does to tell the application where to look for the System account database. The application is not connected directly to the NSS library, and GLIBC is automatically transferred to the NSS library via Dlopen. If such a l
inconsistent, or the/etc/ld.so.cache is corrupted. This error does not occur on GLIBC 2.3.2, and it is possible that the Ld-linux bug has been resolved.In spite of this, LDD does not list all the dynamic libraries that the program relies on, and the system calls Dlopen to automatically call into the required dynamic libraries when needed, and these libraries may not be listed by LDD. The NSS (Name Server Switch) library, as part of GLIBC, is a typical example of what NSS does to tell the applic
, and it is possible that the Ld-linux bug has been resolved.In spite of this, LDD does not list all the dynamic libraries that the program relies on, and the system calls Dlopen to automatically call into the required dynamic libraries when needed, and these libraries may not be listed by LDD. The NSS (Name Server Switch) library, as part of GLIBC, is a typical example of what NSS does to tell the application where to look for the System account database. The application is not connected direct
does not occur on GLIBC 2.3.2, and it is possible that the Ld-linux bug has been resolved.In spite of this, LDD does not list all the dynamic libraries that the program relies on, and the system calls Dlopen to automatically call into the required dynamic libraries when needed, and these libraries may not be listed by LDD. The NSS (Name Server Switch) library, as part of GLIBC, is a typical example of what NSS does to tell the application where to look for the System account database. The appli
does not occur on GLIBC 2.3.2, and it is possible that the Ld-linux bug has been resolved.In spite of this, LDD does not list all the dynamic libraries that the program relies on, and the system calls Dlopen to automatically call into the required dynamic libraries when needed, and these libraries may not be listed by LDD. The NSS (Name Server Switch) library, as part of GLIBC, is a typical example of what NSS does to tell the application where to look for the System account database. The appli
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