A collection of tricks in Javascript-js

1, for String,number and other basic types, = = and = = = There is a difference1) Comparison of different types, = = Comparison of "converted to the same type of value" to see if "value" is equal, = = = If the type is different, the result is not

[Leetcode] [JavaScript] Maximum Subarray

Maximum SubarrayFind the contiguous subarray within an array (containing at least one number) which have the largest sum.For example, given the array [−2,1,−3,4,−1,2,1,−5,4] ,The contiguous Subarray has the [4,−1,2,1] largest sum = 6

JavaScript-Get Height

Web page Visible area width: document.body.clientWidthWeb page Visible Area height: document.body.clientHeightWeb page Visible Area width: document.body.offsetWidth (including edge width)Web page Visible Area High: document.body.offsetHeight

JavaScript notes (Basic)

1.------------------------------------------------------------------------------------------JavaScript can "display" data in different ways:Writing into an alert box, using Window.alert ().Writing into the HTML output using document.write ().Writing

JavaScript Regular expression title case list

Regular expressions are important in JavaScript for character matching, substitution, and validation. Basic basics of getting started with regular expressions     Regular Expression:  A Rule object,  can match our string to that rule and return true 

Convert numbers to uppercase amounts with JavaScript

Project, use JavaScript to convert numbers to uppercase amounts, share them to everyone 12345678910111213141516171819202122232425262728293031323334 var digitUppercase = function(n) {    var fraction = [‘角‘, ‘分‘];    var digit = [    

Learn JavaScript closures

NanyiDate: August 30, 2009Closures (closure) are a difficult and unique feature of the JavaScript language, and many advanced applications rely on closures.Here is my study note, which should be useful for JavaScript beginners.The scope of a

JavaScript Learning notes: 3 ways to define functions

① defining functions using function declaration syntax1 function sum (num1,num2) {2 return num1+num2; 3 }② defining functions using function expressions1 var sum=function(num1,num2) {2 return num1+num2; 3 }③ defining functions using function

JavaScript language Core

ECMAScript: is a set of standard, core, definition specification, syntax, data type, basic object, keyword ...HTML tag type: block, inline, inline-block, table ... Type allows us to distinguish between different types of tags knowing what style to

5 minutes to teach you how to learn JavaScript regular expressions

The importance of regular expression in the actual development process and the technical interview process is self-evident, this article just teaches you how to learn the regular expression in a few minutes, the principle and the operating mechanism

JavaScript objects (object)

JavaScript's simple data types include numbers, strings, Boolean values, null values, and undefined values, all of which are objects.  Numbers, strings, and Boolean "seemingly" objects because they have methods, but they are immutable. The object in

JavaScript raw data type CompareTo reference data type-where it's not going to last 3 days

The ECMASCIRPT variable has two different data types: 基本类型,引用类型 . There are other terms, such as 原始类型和对象类型 , 拥有方法的类型和不能拥有方法的类型 can also be divided into 可变类型和不可变类型 , in fact, these names are based on these two kinds of 类型特点 naming, we love to call

JavaScript Series----Object-oriented JavaScript

Source: http://www.cnblogs.com/renlong0602/p/4387588.htmlThe center of this article:This article is more difficult to understand, so it is more obscure to read. So, let me make a brief list of the outlines:In the first part, starting with the

[Leetcode] [JavaScript] Count of Smaller Numbers after self

Count of Smaller Numbers after selfYou were given an integer array nums and you had to return a new counts array. The counts array has the property where are the number of smaller elements to the right of counts[i] nums[i] .Example:nums = [5, 2, 6, 1

Common ways to set up and get cookies for JavaScript

Get cookiesfunction Getcookievalue (cookiename){var cookievalue = Document.cookie;var cookiestartat = Cookievalue.indexof ("" +cookiename+ "=");if (cookiestartat==-1){Cookiestartat = Cookievalue.indexof (cookiename+ "=");}if

"translated" JavaScript Developer annual survey Report

So far more than 5000 people have participated (the survey), to say the exact 5350 people. I can't wait to share with you the details of this investigation. Before sharing, I would like to thank everyone involved in the survey. This is a great time

A library of 35 JavaScript graphics charts for developers

A library of 35 JavaScript graphics charts for developersA graph is a graphical representation of data, which means "displaying data through an image of a chart, such as a bar chart, a line chart, and a pie chart." Almost every development or

JavaScript parameter passing and variable copying

The ECMAScript variable may contain values for two different data types: the base type value and the reference type value.        A primitive type value refers to a simple data segment, whereas a reference type value refers to an object that may

[Immutable.js] Using Fromjs () to Convert Plain JavaScript Objects into immutable Data

Immutable.js offers the Fromjs () method to build immutable structures from objects and array. Objects is converted into maps. Arrays is converted into lists. The Fromjs () method can also take a reviver function for custom conversions.Object to

JavaScript data types

There are 5 simple data types in ECMAscript, also known as basic data types: Undefined, Null, Boolean, number, and string. There is also a complex data type of--object.Undefined typeWhen you declare a variable with VAR but do not initialize it, the

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