difference between angularjs 2 and 4

value of "Li Long", output names and names2, we found that ' lilong ' value has been changed to Chinese, it seems that this does not conform to the nature of copy.This copy we call a shallow copy.There are three methods of shallow copy: Using the slice [:] Action Using factory functions (such as List/dir/set) Using the copy () function in the Copy module 1 person = ['name', ['saving', +]]2 P1 = copy.copy (person)3 p2 = person[:]

To this topic you may have guessed what I will say next, hehe, right, that is to list these two different versions of the But not! You'll find that Python has two major versions, Python2 and Python3, but Python is different from other languages, backward-compatible, and Python3 is backward-compatible, but most of the components and extensions are based on Python2, Here's a summary of the difference between Python2 and Python3. 1. Performance The Py

1 /// 2 ///Entity diff Comparator 3 /// 4 /// Source Version Entity 5 /// Current Version Entity 6 /// true existence change false not changed 7 protected Static BOOLDifferencecomparisonstring> Exclude)whereT1:mbasewhereT2:mbase8 { 9Type T1 =source. GetType ();TenType t2 =Current . GetType (); Onepropertyinfo[] Property1 =t1. GetProperties ()

assert (booleanexpression);VERIFY (booleanexpression);Assert_valid (Pobject);Assert_kindof (classname, pobject);ATL asserts Atlassert (booleanexpression);In addition, the compilation of TRACE () macros is also controlled by _DEBUG.4./GZ option: This option will do the following things(1) Initialize memory and variables.(2) When a function is called through a function pointer, the matching of the function c

In short, = = equality equivalent, = = = Identity identity.= =, when the value types on both sides are different, type conversion is performed before comparison.= = =, do not type conversion, different types of certain range.Or:= Assignment operator= = equals= = = Strictly equal To----------------------------------------------------------------------------The following are respectively explained:First say = = =, this is relatively simple. The following rules are used to determine if two values a

First of all, = = Equality equivalent, = = = Identity identity.= =, when the value types on both sides are different, type conversion is performed before comparison.= = =, do not type conversion, different types of certain range.The following are respectively explained:First say = = =, this is relatively simple. The following rules are used to determine if two values are equal to = = =:1. If the type is different, [unequal]2, if two are numeric, and i

p, width=44.5%, Float=left Left column P.first, border-right: #a7a7a7 1px solid, width=45% 2) Right column #right, margin-left:50% Left column #left, float=left,width=50% border-right: #a7a7a7 1px solid The key point of the above two methods is to select one of the Float=left Five, random switch pictures: #random { Background:url (/rotate.php); } This method is very ingenious. 4, about the highly adapti

I python compiler 3.4.3 version, but the existing code is mostly based on 2.X, so in the reference before the code often encounter compatibility problems, this time to the usual problems recorded, right when summed up. After encountering new problems again, add one by one: 1.print and print () In Python2. x, to output, you can use print directly: such as print ' hello,world! ' In python3.x, print is treated as a function that must be done: ![ Here w

Reference is a great tool to improve the efficiency of code, especially for objects, when referenced as a parameter without the large area of the copy object itself caused by the space and time wasted. So sometimes we want to return a reference to a parameter for the return value of the parameter. Here we recall that the C function returns local variables to the attention of the aspects, you can also see my article. Let's discuss the function return reference or non-reference in C + +!!1. Return

Difference between exit return (2) and exitreturn1. return returns the function value, which is a keyword; exit is a function.2. return indicates the language level, which indicates the return of the call stack, and exit indicates the system call level, which indicates the end of a process.3. return indicates the exit of the function (return); exit indicates the

, and the warranty date is the same as the market sales machine. The accessories are all new and original. 　　 2, the official change machine Very simple, we all know that Apple has a problem (not man-made damage without great mishap) can be shifting. So the phone is out of the question, take it to the Apple store and go straight for a new machine. So this switch back to the phone is the official change machine. The official chan

1. Namespaces:Using System.Runtime.InteropServices;2. How to Import[DllImport ("user32.dll", EntryPoint = "getkeyboardstate")]public static extern int getkeyboardstate (byte[] pbkeystate);3. Case Statepublic static bool Capslockstatus{Get{Byte[] bs = new byte[256];Getkeyboardstate (BS);Return (bs[0x14] = = 1);}}4, reference, this part according to your needs to modifyprivate void Button2_Click (object sende

In a Linux system, there are two types of links : One called hard link, and the other is called symbolic link or soft link (symbolic link). 1) by default, theln command creates a hard link without parameters. 2) The hard link file is the same as the Inode node number of the source file , and the inode number of the soft link file differs from the source file. 3) The ln command cannot create a hard link to a directory, but it can create soft li