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This article mainly introduces how to solve the floating point computing BUG in js. If you need it, you can refer to it and hope to help you with projects that have been used in the past, I found this code on the Internet before, but there will still be bugs in division and addition operations under specific conditions. I am slightly optimized. The Code is as follows: // Division function, used to obtain accurate division results// Note: the divisio
No matter how technical you are, errors or anomalies are part of the life of the application developer. The discontinuity of web development leaves many places where errors can occur and that do occur. The key to the solution is to handle any unforeseen (or foreseeable) error to control the user's experience. With JavaScript, there are a variety of technical and linguistic features that can be used to corre
Article category: Web Front-endI. multiple choice questions 1. Which of the following statements will generate a running error :()A. var obj = ();B. var obj = [];C. var obj = {};D. var obj = //; 2. Which of the following words does not belong to a reserved javascript word :()A.B. parentC. classD. void 3. Select a true expression :()A. null instanceof ObjectB. null === undefinedC. null = undefinedD.
For JavaScript errors, such as XXX undefined,syntaxerror, we are more familiar with, this article we discuss how the JavaScript error capture.Our team names the wrong JavaScript code as BADJS, and there is an open source Badjs project that captures and analyzes JS errors and provides some basic analysis of report data.
This article mainly describes how to capture and analyze JavaScript Error, interested friends can refer to the following How to capture and analyze JavaScript errornbsp; nbsp; Front-End engineers know that JavaScript has basic exception handling capabilities. We can throw the new
JavaScript Error handling and debuggingLearning Essentials:1. Browser Error Reporting2. Error handling3. Error events4. Error handling Policy5. Commissioning Technology6. Debugging ToolsJavaScript has always been a soft rib in
How to capture and analyze JavaScript Error Front-end engineers know that JavaScript has basic exception handling capabilities. We can throw the new error () and the browser throws an exception when we invoke the API error. But it is estimated that most front-end engineers
Front-end engineers know that JavaScript has basic exception handling capabilities. We can throw the new error () and the browser will throw an exception when we call the API error. But it is estimated that most front-end engineers have not considered collecting these anomaly information.Anyway, as long as the JavaScript
Anyway, as long as the JavaScript error after the refresh is no longer, the user can solve the problem by refreshing, the browser will not crash, when it did not happen well. This assumption was established before the single Page App was popular. Now the single Page APP runs for a period of time after a very complex state, the user may have a number of input oper
Javascript error handling and debugging This article mainly introduces some common errors in javascript and some basis for debugging and handling errors to help us improve the quality of javascript code. Let's startJavascriptCommon7Errors: 1.Variable undefined The following statement implicitly creates a new variabl
This article mainly introduces JavaScript Some common mistakes in the , and some of the basics for debugging and handling Errors , to help us improve JavaScript the quality of the code .First , JavaScript Common in the 7 Kind of error :1. variable not definedThe following statement implicitly creates a new variable AB
Front-end engineers know that JavaScript has basic exception handling capabilities. We can throw the new error () and the browser throws an exception when we invoke the API error. But it is estimated that most front-end engineers have not considered collecting these exception information. Anyway, as long as the JavaScript
Solve, how to solve it? Another domain name walk is OK, but this domain name does not go, front-end code is as follows: The backend code is as follows: Reply content: Solve, how to solve it? Another domain name walk is OK, but this domain name does not go, front-end code is as follows: The backend code is as fo
Objective This article is my Learning JavaScript process of collection and collation of some error-prone knowledge points, this paper introduces and explains the 6 aspects of variable scope, type comparison, this point, function parameter, closure problem and object copy and assignment, which also involves some ES6 knowledge points. JavaScript knowledge points
languages will have similar accuracy errors, but in C++/c#/java these languages have encapsulated the method to avoid the problem of precision, and JavaScript is a weak type of language, There is no strict data type for floating-point numbers from the design idea, so the problem of precision error is particularly prominent. The following is an analysis of why this accuracy
. Call: Accmul (ARG1,ARG2)//return value: Arg1 times Arg2 's exact result function Accmul (arg1,arg2) {var m=0,s1=arg1.tostring (), s2= Arg2.tostring (); Try{m+=s1.split (".") [1].length}catch (e) {} try{m+=s2.split (".") [1].length}catch (e) {} return Number (S1.replace (".", "")) *number (S2.replace (".", ""))/math.pow (10,M)}// Adding a Mul method to the number type is more convenient to call. Number.prototype.mul = function (ARG) {return Accmul (ARG, this);} An additive function that is us
Recently, I have been reading Nicholas's "JavaScript Advanced Program Design", is really a good book, easy to understand, well-organized than the "JavaScript authoritative guide" good understanding of some, of course, "JavaScript authoritative guide" has the advantages of authoritative guidance, not gossip, into the topic.Read the technical book I usually like to
encapsulated a method to avoid the problem of precision, while JavaScript is a weak type of language, There is no strict data type on floating-point number from the design idea, so the problem of precision error is especially prominent. Here is an analysis of why there is this precision error, and how to fix this error
ajax|javascript|web| Error | Solve the author in the study of QuickGuide.txt article at the same time, according to sequential Step-by-step approach, the results of the run, found that always appear such errors, "WebForm1" does not define JavaScript errors, Changed to the root of the item, the
If I ask you 0.1 + 0.2 equals how many? You may send me a supercilious eye, 0.1 + 0.2 = 0.3 Ah, that still ask? Even the kindergarten children will answer such a childish question. But you know, the same problem is in the programming language, maybe it's not as simple as it might seem.Don't believe it? Let's look at a section of JS first. var NumA = 0.1;var NumB = 0.2;Alert (NumA + numB) = = 0.3); The execution result is false. Yes, when I first saw this code, I took it for granted that it was
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