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The latest operators added to JavaScript are spread operator and rest.Rest operatorWith rest parameter, you can represent number of arguments as an array. ES6 brought rest parameter to ease the work of developers. For arguments objects, rest parameters are indicated by three dots … and preceds a parameter.ExampleLet’s see the following code snippet to define rest parameter function addition(…numbers) { var res = 0; numbers.forEach(function (number) { res += number; ... Read More
The shown.bs.popover event fires when the popover is completely visible.Firstly, display the popover on button click using the following code −$(".btn-default").click(function(){ $("[data-toggle='popover']").popover('show'); });After that, fire the popover shown.bs.popover event and generate alert −$("[data-toggle='popover']").on('shown.bs.popover', function(){ alert('Popover is completely visible!'); });You can try to run the following code to implement the show.bs.popover event −ExampleLive Demo Bootstrap Example Awards Here's the list: List ... Read More
Rest ParameterWith rest parameter, you can represent a number of arguments as an array. ES6 brought rest parameter to ease the work of developers. For arguments objects, rest parameters are indicated by three dots … and precedes a parameter.Let’s see the following code snippet to define rest parameter − function addition(…numbers) { var res = 0; numbers.forEach(function (number) { res += number; }); ... Read More
In Python 2.x there are two styles of classes depending on the presence or absence of a built-in type as a base-class −‘Old style’ or "Classic" style classes: they have no built-in type as a base class −>>> class OldFoo: # no base class ... pass >>> OldFoo.__bases__ ()"New" style classes: they have a built-in type as a base class meaning that, directly or indirectly, they have object as a base class −>>> class NewFoo(object): # directly inherit from object ... pass >>> NewFoo.__bases__ (, )In Python 3.x however, only ... Read More
Rest parametersWith rest parameter, you can represent a number of arguments as an array. ES6 brought rest parameter to ease the work of developers. For arguments objects, rest parameters are indicated by three dots … and precedes a parameter.Arguments objectArguments object in JavaScript is an object, which represents the arguments to the function executing.Here is the difference between rest parameters and the arguments object.Arguments object includes all arguments passed to the function, whereas rest parameters are those, which are not given another name.The rest parameters are Array instances, whereas arguments object isn’t an array. Array instances are the following methods: ... Read More
To refresh a page in a web browser like Firefox means reloading the page. It’s quite easy to refresh a page. Follow the below given steps −Open web pageOpen the web page, which you want to refresh.Find Refresh buttonThe refresh button is located on the top right corner of the Firefox web browser. Yes, the circular arrow. Just click on it reload as shown below −Click on the arrow to reload the website. Through this, you can easily reload any web page.
In this problem, an undirected graph is given. There is also provided m colors. The problem is to find if it is possible to assign nodes with m different colors, such that no two adjacent vertices of the graph are of the same colors. If the solution exists, then display which color is assigned on which vertex.Starting from vertex 0, we will try to assign colors one by one to different nodes. But before assigning, we have to check whether the color is safe or not. A color is not safe whether adjacent vertices are containing the same color.Input and ... Read More
The code below shows the if the attribute 'foo' was defined or derived in the classes A and B.Exampleclass A: foo = 1 class B(A): pass print A.__dict__ #We see that the attribute foo is there in __dict__ of class A. So foo is defined in class A. print hasattr(A, 'foo') #We see that class A has the attribute but it is defined. print B.__dict__ #We see that the attribute foo is not there in __dict__ of class B. So foo is not defined in class B print hasattr(B, 'foo') #We see that class B has ... Read More
This problem is to find an arrangement of N queens on a chess board, such that no queen can attack any other queens on the board.The chess queens can attack in any direction as horizontal, vertical, horizontal and diagonal way.A binary matrix is used to display the positions of N Queens, where no queens can attack other queens.Input and OutputInput: The size of a chess board. Generally, it is 8. as (8 x 8 is the size of a normal chess board.) Output: The matrix that represents in which row and column the N Queens can be placed. If the ... Read More
jQuery is a fast and concise JavaScript Library created by a John Resig in 2006 with a nice motto − Write less, do more.jQuery simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development.Here is the list of important core features supported by jQuery:DOM manipulation − jQuery made it easy to select a DOM elements, traverse them and modifying their content by using a cross-browser open source selector engine called as Sizzle.Event handling − The jQuery offers an elegant way to capture a wide variety of events, such as a user clicking on a link, without ... Read More