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Server Side Programming Articles
Page 1754 of 2109
C++ code to find out if everyone will get ice cream
Suppose, there are three groups of people coming to a party. The first group of people likes butterscotch ice cream and do not like any other flavors of ice cream, the second group of people only dislikes strawberry ice cream and like every other flavor, and the third group likes all kinds of ice cream. Now, there are x people of the first group, y people of the second group, and z people of the third group are coming to a party, and everyone should have at least one icecream of their liking. The party organizers have brought a packs ...
Read MoreC++ code to find out if a grid is fully accessible
Suppose, we are given a grid that has 2 rows and n columns. A robot is at position (0, 0) in the grid and wants to visit (1, n - 1) by visiting adjacent and corner cells to its current location. We are given the grid in an array of strings, a cell is blocked if it is marked '#' and it is accessible if it is marked '.'. We have to find out if the robot can visit cell (1, n - 1) from the cell (0, 0).So, if the input is like n = 4, grid = {".##.", ...
Read MoreC++ code to find total elements in a matrix
Suppose, we are given a matrix of n rows and m columns. We have to find out the number of elements present in it. We find out the value and display it as output.So, if the input is like n = 20, m = 15, then the output will be 300.StepsTo solve this, we will follow these steps −return n * mExampleLet us see the following implementation to get better understanding −#include using namespace std; #define N 100 int solve(int n, int m) { return n * m; } int main() { int n = 20, m = 15; cout
Read MoreExpress.js – router.param() Method
router.param(name, callback) adds a callback to the route parameters where name defines the name of the parameter and callback is the callback function.Following are the parameters of the callback function −req – the request objectres – the response objectnext -- the next middlewarename – value of the name parameterSyntaxrouter.param( name, callback )ExampleCreate a file with the name "routerParam.js" and copy the following code snippet. After creating the file, use the command "node routerParam.js" to run this code as shown in the example below −// router.param() Method Demo Example // Importing the express module var express = require('express'); // Importing ...
Read MoreSkipping middleware in Express.js
You need to pass some parameters to skip the middleware in an Express application. On the basis of that parameter with logic in place, you can decide whether to execute a middleware or notSyntaxThere is no syntax defined. You can introduce a parameter and then check based upon that parameter whether to use the middleware or not.ExampleCreate a file with the name "skipMiddleware.js" and copy the following code snippet. After creating the file, use the command "node skipMiddleware.js" to run this code as shown in the example below −// app.set() Demo Example // Importing the express module var express ...
Read MoreSending HTTP error code using Express.js
We can send different HTTP status and responses over the Express.js app endpoint as per the user's requirement. Also we can send a message in case of an error or when the requests are forbidden. The status code 200 is sent by default with the response returned.Syntaxres.status( statusCode )Example 1Create a file with the name "status.js" and copy the following code snippet. After creating the file, use the command "node status.js" to run this code as shown in the example below −// Specifying status code Demo Example // Importing the express module var express = require('express'); // Initializing ...
Read MoreExpress.js – res.headersSent Property
res.headersSent returns a Boolean value that indicates if the app has sent HTTP headers for the response or not. If the headers are sent, it returns True; else False.Syntaxres.headersSentExample 1Create a file with the name "headersSent.js" and copy the following code snippet. After creating the file, use the command "node headersSent.js" to run this code as shown in the example below −// res.headersSent Property Demo Example // Importing the express module var express = require('express'); // Initializing the express and port number var app = express(); // Initializing the router from express var router = express.Router(); var ...
Read MoreExpress.js – router.METHOD() Method
The router.METHOD() is used for providing the method functionality in Express, where METHOD represents one of the HTTP methods such as GET, POST, PUT, and so on, in lowercase. Therefore, the actual methods are represented as following −router.get()router.post()router.put() …… and so on...Syntaxrouter.METHOD( path, [callback ...], callback )Example 1Create a file with the name "routerMETHOD.js" and copy the following code snippet. After creating the file, use the command "node routerMETHOD.js" to run this code as shown in the example below −// router.METHOD() Method Demo Example // Importing the express module const express = require('express'); // Initializing the express and ...
Read MoreExpress.js – res.get() Method
The res.get() method is used to return the HTTP headers specified by the field. The match is case-insensitive and therefore returns all the matching patterns.Syntaxres.get( field )Example 1Create a file with the name "resGet.js" and copy the following code snippet. After creating the file, use the command "node resGet.js" to run this code as shown in the example below −// res.get(field) Method Demo Example // Importing the express module var express = require('express'); // Initializing the express and port number var app = express(); // Initializing the router from express var router = express.Router(); var PORT = 3000; ...
Read MoreExpress.js – req.range() Method
req.range() is basically a range header parser. The accept-ranges and the response-header fields allow the server to indicate the acceptance of the range requests from a resource.Syntaxreq.range( size, [options])ParametersThe above parameters are defined as follows −size – The size parameter defines the maximum size of the resource.options – The options parameter can have the following properties −combine – It is a Boolean type variable. This parameter specifies if overlapping and whether the adjacent ranges should be combined or not. Default: FalseExample 1Create a file with the name "reqRange.js" and copy the following code snippet. After creating the file, use the ...
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