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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
HTML5 Geolocation API lets you share your location with your favorite websites. A JavaScript can capture your latitude and longitude and can be sent to backend web server and do fancy location-aware things like finding local businesses or showing your location on a map.Geolocation is complicated, and it is very much required to catch any error and handle it gracefully.The geolocations methods getCurrentPosition() and watchPosition() make use of an error handler callback method which gives PositionError object. This object has following two properties −PropertyTypeDescriptionCodeNumberContains a numeric code for the error.messageStringContains a numeric code for the error.The following table describes the possible ... Read More
The HTML element is used to add audio to web page. To add an audio player, add the controls attribute.The following three audio formats are supported in HTML − MP3, Wav, and Ogg.ExampleYou can try to run the following code to add an audio player to an HTML web pageLive Demo HTML audio Tag Click on Play button... (Song: Kalimba which is provided as a Sample Music in Windows)
In this problem, there is a given maze of size N x N. The source and the destination location is top-left cell and bottom right cell respectively. Some cells are valid to move and some cells are blocked. If one rat starts moving from start vertex to destination vertex, we have to find that is there any way to complete the path, if it is possible then mark the correct path for the rat.The maze is given using a binary matrix, where it is marked with 1, it is a valid path, otherwise 0 for a blocked cell.NOTE: The rat can ... Read More
In the crypt-arithmetic problem, some letters are used to assign digits to it. Like ten different letters are holding digit values from 0 to 9 to perform arithmetic operations correctly. There are two words are given and another word is given an answer of addition for those two words.As an example, we can say that two words ‘BASE’ and ‘BALL’, and the result is ‘GAMES’. Now if we try to add BASE and BALL by their symbolic digits, we will get the answer GAMES.NOTE &minuns; There must be ten letters maximum, otherwise it cannot be solved.Input and OutputInput: This algorithm will ... Read More