elevation internship

Dynamic scriptingLoading external scriptsWay one, write the code directly:var script = document.createelement ("script"), Script.type = "Text/javascript"; script.src = "Js/test.js"; Document.body.appendChild (script);Mode two, encapsulated into functions:function Createscript (URL) {var script = document.createelement ("script"); script.type = "Text/javascript"; script.src = Url;document.body.appendchild (script);}; Createscript ("Js/test.js");in-line scriptingCreate a SCRIPT element and write c

first , the variables in JavaScript are divided into basic types and reference types. A basic type is a simple piece of data that is stored in the stack memory, whereas a reference type refers to an object that is stored in the heap memory. 1. Parameter passingThe passing of all parameters in JavaScript is a value pass.1.1 Delivery of basic data types (undefined, null,boolean,number,string)1--->var money = 10;2--->var t=function (money) {Money = 5;alert (money); 5}3--->t (money);4--->alert (mone

For some running programs, we want them to be as much as possible as the operating system can do, but the operating system has permissions for each process, then we need to elevate the expected process, review MSDN and some other materials, write a function that can be used to elevate the process permissions. Can be used to invoke directly in the program. The code is as follows:The incoming privileges parameter is used to get the permissions you want to get//view MSDN LOOKUPPRIVILEGEVALUE functi

avoid this problem.(function () { //This is a block-level scope}) ()The above code defines and immediately invokes an anonymous function. A function declaration is included in a pair of parentheses to indicate that it is actually a function expression. And then there's a pair of parentheses that immediately call this function,The second method:var someFunction = function () { //This is a block-level scope};somefunction ();The example above defines a function and then calls it immediately.

When I first started using JS, I felt that the language was so simple. Very fast to use. But when I ask myself, the essence of JS, where the characteristics, just don't need to define the type,You don't need to manage your own memory. The initial understanding of JS is limited to this.Always understand is that JS is an explanatory language, the code line parsing down, suddenly found a way, let me have doubts about this, after Baidu finallyKnow why. Here I briefly record the next.Count (on); func

-named expressions)You can name a function through a function expression, which looks like a function declaration, but it's not. Previous section of code:Foo (); TypeError "Foo is not a function"Bar (); ValidBaz (); TypeError "Baz is not a function"Spam (); Referenceerror "spam is not defined"var foo = function () {}; anonymous function expression (' foo ' gets hoisted)function bar () {}; function declaration (' Bar ' and the function body get hoisted)var baz = function spam () {}; Named functio

The variable declaration should be at the top of the scope, but the assignment is not.function Example () {var declaredbutassigned;//as output declaredbutnotassigned undefined Console.log (declaredbutnotassigned) Declaredbutnotassigned = true}Anonymous expressions can elevate their variable names, but they cannot raise function assignments.function Example () {console.log (anonymous);//undefined anonymous ();//Type error var anonymous = function () {console.log (' Anonymous function expression '

for DomThis book has been written for several years, web development in recent years very fast, you can try the links behind the check. https://caniuse.com/#search =domOther DOM Standards SVG (Scalable Vector Graphic scalable vectors) MathML (mathematical Markup Language Mathematical Markup Language) SMIL (Synchronized Multimedia integration Language synchronized Multimedia integrated language) Browser object Model (BOM)Fundamentally, the BOM only handles browser window

global scope, we generally declare global variables as little as possible.Variable elevation (Variable hoisting)So the variable declaration is elevated to the beginning of the function (if the variable is inside the function) or to the beginning of the global scope (if the variable is a global variable). Let's take a look at an example: Copy Code code as follows: function ShowName () { Console.log ("Name:" + name); var name = "Fo

How a function is declared There are usually two ways to declare a function when you define it: Foo () {}; function declares var foo = function () {}; function expression The difference 1, function expression followed by parentheses can be directly executed2. The function declaration will be resolved in advance Pre-resolution Let's take a look at the first example: Foo (); function declaration Foo_later (); Foo_later is not a function function foo () {console.l

implemented in a stored procedure, we use a undocument query hint directly on the statement, which causes the parallel cost threshold of the query to be reduced to 0, which forces the statement to go parallel and the statement execution time from 20 seconds to 5 seconds (note: Using the hash join hint is 7 seconds). The following is a simple example of the effect of using this hint, as shown in Listing 1 of the sample T-sql: from [AdventureWorks]. [Sales]. [SalesOrderDetail] A on a.salesorderi

The command history mechanism of the shell environment in Linux provides users with great convenience, and also poses a potential risk to users. As long as the user's command history file, the user's command operation process will be sweeping, if the command line has been entered in plaintext password, then inadvertently the server's security fortress has a more notch.In the bash terminal environment, the number of record bars for history commands is controlled by the variable histsize, which de

Android Internship notes (4)---Fragment (fragmentation) Basic concept analysisReprint Please specify source: Coder-pigFragment believe that everyone will be unfamiliar, slide, drawer effect, dialogfragment ah, and so on, a lot of places willUsed to fragment, for the basic concept of fragment in the previous article has actually given, here review again,Warm so know new well, combined with Google's official API to review!1) What is the fragment and its

Android Internship notes (3)---Fragment with app package or V4 package parsing1) Problem briefBelieve that a lot of friends in the call fragment will encounter the following situation:This time the problem comes ...In the end is to use Android.app under the fragment or Android.support.v4.app bag under the fragment?Answer: Actually all can, yes, can all!!! We all know that fragment was introduced after 3.0 (API 11). So what if the app needs to run in

Android Internship notes (5)---the implementation of the bottom navigation bar of fragment--Reprint Please specify Source: Coder-pigIn Part 4 we reviewed the basic concepts of fragment, and in this section we will learn the simple examples of fragment applications.is to use fragment to achieve a simple bottom navigation bar, first paste:It looks simple, and it's easy to implement, huh! Then come down and look at the flowchart of the implementation:Imp

Originally to do the purpose of data mining in which network, the structure has become a system development ...But still more serious to do for three months, the teacher is very agree with my work attitude and results ...The internship is coming to an end, summarizing a few things that have not been noticed before to become habits and problems, to share to everyone.At the same time to play an advertisement: to which network Internal audit department r

Originally to do the purpose of data mining in which network, the structure has become a system development ...But still more serious to do for three months, the teacher is very agree with my work attitude and results ...The internship is coming to an end, summarizing a few things that have not been noticed before to become habits and problems, to share to everyone.At the same time to play an advertisement: to which network Internal audit department r

Originally to do the purpose of data mining in which network, the structure has become a system development ...But still more serious to do for three months, the teacher is very agree with my work attitude and results ...The internship is coming to an end, summarizing a few things that have not been noticed before to become habits and problems, to share to everyone.At the same time to play an advertisement: to which network Internal audit department r

Today came to the unit, take my eldest brother did not give me the task, just let me read, because today they want to meet. I didn't understand any of the books I had, after all, I had no interest in finance. Finally, when they finish the meeting or I clean up the conference room (really cheap hard labor)First week Summary:The first time I came to a new internship, I was looking forward to being nervous. Although the job is simple auxiliary work. But

In August, began to find internships, go for a spin, was rejected many times, finally at the end of August when found an internship.Today, the first day of the internship is over. Write down this essay to record the Impressions of the first day of your internship.First of all, the greatest feeling is the environment of the non-adaptation, the school kind of relatively relaxed, casual environment, no restraint. While at work it is a formality, and the