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Articles on Trending Technologies
Technical articles with clear explanations and examples
What is the difference between –Match, -Like and –Contains Operator in PowerShell?
All the above 3 operators (Match, Like, and Contains) mentioned are the comparison operator in PowerShell. Match and Like operators are almost similar operator only difference is the Wildcard character and the Contains operator is entirely different. We will see the example and understand how they work.ExamplePS C:\WINDOWS\system32> "This is a PowerShell String" -Match "PowerShell" True PS C:\WINDOWS\system32> "This is a PowerShell String" -Like "PowerShell" False PS C:\WINDOWS\system32> "This is a PowerShell String" -Contains "PowerShell" FalseIf you see the output of the above example, the result is True only for the Match statement and reason is when you match the ...
Read MoreHow to write Progress Bar in PowerShell?
When we write a script in PowerShell, users who execute it, expect to see the progress of the script instead of waiting idle and looking at the blank cursor while the script is executing the background task. One way to achieve is to use the Verbose parameter to see the progress but it doesn’t show the graphical progress. To see the graphical progress, you can use Write-Progress cmdlet supported by PowerShell.Write-Progress cmdlet mainly depends on 3 parameters.Activity − Title of the progress bar or you can mention the activity name that is being performed.Status − Subtitle of the Progress bar. ...
Read MoreHow to remove empty string/lines from PowerShell?
In many instances, you need to remove empty lines or strings from the PowerShell string array or the files. In this article instead of removing empty string, we will get the result or filter the output from lines that are not empty. In this way, we can get the output without empty lines.Consider the example below, we have a file called EmptryString.txt and we need to remove empty lines from the content.The content of the text file is as below.PS C:\Windows\System32> Get-Content D:\Temp\EmptyString.txt This is example of empty string PowerShell PowerShell DSC String Array HelloYou just need to apply the ...
Read MoreCount no. of characters and words in a string in PL/SQL
We are given a string of any length and the task is to calculate the count of characters and words in a string using PL/SQL.PL/SQL is a combination of SQL along with the procedural features of programming languages.It was developed by Oracle Corporation in the early 90's to enhance the capabilities of SQL. PL/SQL is one of three key programming languages embedded in the Oracle Database, along with SQL itself and Java.In PL/SQL block, we have DECLARE block which is used to declare the variables used in programming and we have BEGIN block where we write the logic for the ...
Read MoreConvert distance from km to meters and centimeters in PL/SQL
The task is to convert the distance from kilometers to meters and centimeters in PL/SQL.PL/SQL is the extension of SQL which combines the Data manipulation of SQL with the working of procedural language.According to the problem we should have distance in kilometers whose value we have to convert in meters and centimeters.As per the conversion rule −1km = 1000 meters1km = 100000 centimetersAccording to this conversion rule we want the distance to be converted by a logic in PL/SQL.ExampleInput: kilometer = 10 Output: meter = 10000 Centimeter = 1000000 Input: kilometer = 9 Output: meter = 9000 Centimeter ...
Read MoreMongoDB aggregation with equality inside array?
For this, use aggregate() along with $group. Let us create a collection with documents −> db.demo578.insertOne( ... { ... "_id" : 1, ... "Info" : { ... "firstName" : "Chris", ... "lastName" : "Brown" ... }, ... ... "achievements" : [ ... { ... "winner" : "10th", ... "year" : 2010, ... "by" : "School" ... ...
Read MoreStyling html pages in Node.js
In html files we can simply add style in head section − //add css code We can add inline css styles as well in html directly.Generally css is separated from the html code. Third option add css is to include a css file .How to serve static files in Node.js?Generally css files are added with below tag − Express js provides a middleware to seve static file. This middleware gives read access to given folder.app.use(express.static(path.join(__dirname, ‘public’)));path: its our core module ...
Read MoreServing html pages from node.js
So far we sent html code directly from the send(0 function in response object. For sending larger code, we definitely require to have a separate file for html code.sendFile() function−Response object gives a sendFile() function to return a html file to client.How to provide path to html file in sendFile() ?We import the path core module of node.js.const path = require(‘path’);path has a join function . __dirname is a global variable which holds the actual path to project main folder.path.join(__dirname, ‘views’, ‘add-user.html’); This will refer to the actual file location of add-user html code.App.jsconst http = require('http'); const express = ...
Read MoreFiltering paths and creating html page in express.js
We added express router to handle routes. One single router file handles multiple routes.Adding a path for router in App.js −const http = require('http'); const express = require('express'); const bodyParser = require('body-parser'); const route = require('./routes'); const app = express(); app.use(bodyParser.urlencoded({extended: false})); app.use('/test', route); app.use((req, res, next)=>{ res.status(404).send(' Page not found '); }); const server = http.createServer(app); server.listen(3000);In router middleware we used path −/p>app.use('/test', route);Router will handle all paths starting with /test e.g. /test/add-usernameWe have to change action in form in routes.js file −router.get('/add-username', (req, res, next)=>{ res.send(' Send '); });Routes.js file −const express ...
Read MoreAdding 404 page in express
Now we have a App.js and route.js for handling routes. For any other http requests for which we have not added any request handling will results into an error page. Example for url ‘test’ −App.jsconst http = require('http'); const express = require('express'); const bodyParser = require('body-parser'); const route = require('./routes'); const app = express(); app.use(bodyParser.urlencoded({extended: false})); app.use(route); const server = http.createServer(app); server.listen(3000);Showing meaningful error message on incorrect url’s−We can add a all catch middleware for incorrect url at the end of all middleware’s in App.js −const http = require('http'); const express = require('express'); const ...
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