How to change the page title with JavaScript?
To change the page title with JavaScript, we can set the document.title property. This can be useful if you want to change […]
How to get the size of the database in PostgreSQL?
SELECT pg_size_pretty( pg_database_size('dbname') );
TypeError[ERR_UNKNOWN_FILE_EXTENSION]: Unknown file extension “.json” – How to fix ?
Since ES6 when you try to import JSON file you might face this error. To fix this error simple add […]
Kill all blocking objects in Oracle database
To list down all blocking objects with status as ‘is blocking’, we can run the following query. There is a […]
View processes list in tree format in Linux
pstree is a command that shows the running processes as a tree. It is used as a more visual alternative […]
Get home directory of logged in user in Shell
Using a built-in variable: Using a tilde:
Get current user in Shell
Using a built-in variable: Using a command:
Filter on all fields in an array of objects
We know how to filter on an array of objects on specific fields. In some cases we might want to […]
Get the number of processors in Linux and MacOS
This command queries the configured processor values using the getconf command. Example
How can the default node version be set using NVM?
To view the list of NVM installed in your machine: To make an NVM version default:
Round a decimal number to nearest decimal that is divisible by 5 in JavaScript
I would like to convert 1.2 to 1.5 and 1.7 to 2. This is basically rounding a decimal number to […]
Error: algorithms should be set – JWT Error – How to fix?
To fix the error – Error: algorithms should be set – just add the algorithms to the JWT constructor.
Play a Youtube video using pywhatkit in Python
The playonyt() function in pywhatkit module is used to play a Youtube video either from a URL or from a […]
How to send a Whatsapp message with Python?
pip install pywhatkit
import pywhatkit
pywhatkit.sendwhatmsg('+91 9807685671', 'SENDING MESSAGES USING PYWHATKIT', 6,06)
SyntaxError: Cannot use import statement outside a module – How to fix this error in Node.js?
SyntaxError: Cannot use import statement outside a module – This error occurs when you use ES6 imports in your node.js […]
ER_CANNOT_RETRIEVE_RSA_KEY – error when connecting to MySQL with MariaDB npm package. How to fix?
When you connect to a MySQL Database with MariaDB npm package you might face this error. To fix this just […]
Calculate moving average of an array of numbers in JavaScript
Moving average is the average of the current element and the previous elements in an array. We can use the […]
Check if a variable is a date in JavaScript?
We can use these code snippets to determine if a variable is a date in JavaScript. instanceOf Object.prototype.toString.call()
How to filter an object by key in JavaScript?
We can use these code snippets to filter a JavaScript object their keys. Filter and reduce with Object.keys() Filter with […]
Convert HTML to Pug in Node.js
We can use the html2pug npm package to convert HTML to Pug in JavaScript / Node.js. The fragment option tells html2pug whether […]
Convert RGB to Hex in JavaScript
Convert RGB to Hex in JavaScript with the following code snippet.
Find the day of year from date in JavaScript
Find the day of year from date in JavaScript with the following code snippet.
Find the number of days between two days using JavaScript
Find the number of days between two days using JavaScript with this code snippet.
Shuffle an array in random order with JavaScript
Shuffle an array in random order with JavaScript with this code snippet.
Get selected text in JavaScript
In JavaScript we can get the text the user has selected using getSelection property
Detect dark mode in JavaScript
Check if a user’s device is in dark mode with the following code snippet.
How to fix ‘unexpected console statement’ error in Vue.js?
To fix the ‘unexpected console statement’ error in Vue.js, open package.json and under section eslintConfig put no-console under rules and restart dev server (npm run serve or yarn serve). This […]
How to fix ‘unexpected console statement’ error in Node.js?
To fix the ‘unexpected console statement’ error in Node.js, just create a .eslintrc.js in the directory of the project and put the […]
Limit API requests in express.js
In this tutorial we are going to use an npm package called express-rate-limit. Install it using the following command. This […]
Order a string column as an integer in Mysql
Use the following syntax to use a string/ varchar column as a number for ordering in MySQL. Example Here Box […]
How to change bullet color in HTML Lists?
Consider, we have a following bullet list items: To change the default bullet color of a list item, there is […]
How to concatenate strings in Ruby
In this tutorial, we are going to learn about how to concatenate the strings in Ruby. Concatenation means the joining […]
Convert YYYYMXX to date in pandas dataframe in Python
Solution Output
Exception in thread “main” java.util.NoSuchElementException: No value present – How to fix?
NoSuchElementException would be thrown when you are trying to read a line/value that is not present in the source. One […]
Read nth line from file using Java 8 stream
Let’s take a file sample.txt which has the following contents. To read the 3rd line using Java 8 stream, we […]
Check if a path is file or directory in Node.js
To find out if a file path is a file or a directory we can use fs.statSync(path).isDirectory() method. It returns […]
Get file size in Node.js
To get file size in Node.js, the following code snippet would help. statSync() method from fs package synchronously returns information […]
Join strings using StringJoiner in Java
StringJoiner is used to construct a sequence of characters separated by a delimiter and optionally starting with a supplied prefix and […]
Exception in thread “main” org.springframework.dao.EmptyResultDataAccessException: Incorrect result size: expected 1, actual 0
EmptyResultDataAccessException is thrown when a result was expected to have at least one row (or element) but zero rows (or […]
How to use mongodump with a standard mongo connection uri?
You can easily take mongodump from a connection URI by passing –uri flag to the mongodump tool. Syntax Example
Truncate a string at a given length using JavaScript
This code snippet truncates or cuts off a text string after a certain number of characters and add an ellipsis […]
Get details list of pods running on a particular node using kubectl
To get detailed list of pods running on a particular node with kubectl use the following command: Before running the […]
Get a list of all nodes in a cluster using kubectl
To get the list of all nodes in kubernetes cluster use the following command: Example
Get details list of pods using kubectl
To get detailed list of pods with kubectl use the following command: Example
How to clear a list in Python?
To clear/empty a list in Python, we can use the predefined clear() method. Another way to empty a list is by […]
List down all namespaces using kubectl
To get the list of all namespaces use the following command: Example
Installing Metrics Server on Kubernetes
The Kubernetes Metrics Server is an aggregator of resource usage data in your Kubernetes cluster. Follow these steps to install […]
Not able to completely remove Kubernetes CustomResource using kubectl delete crd – How to fix?
When you try to delete a crd using kubectl but it might hang for a long time without any response. […]
Error: rendered manifests contain a resource that already exists – Unable to continue with install – Helm error – How to fix?
When you are using Helm to install components to your Kubernetes cluster there are chances you might face this error. […]
Java Heap Space error in React Native – How to fix?
To fix Java Heap Space error in react native project, just add the heap size you wish to the app/build.gradle […]
unable to create listener: Error listen tcp4 0.0.0.0:443: bind: permission denied – Fix in Ubuntu
I was trying to use kubectl and port forward the service ports to local but Ubuntu doesn’t allow to bind […]
Prevent your node.js server from crashing on production
This tiny piece of code will handle all uncaught exceptions and just log it to the console. The “uncaughtException” event […]
Detect mobile browsers without user agent string parsing: Client Hints
ua-client-hints is a proposal to detect if a site is visited from Chrome on mobile. It states By default, servers […]
How to change MongoDB user password in Mongo shell?
In Mongo shell db.changeUserPassword() shell method is used to change the password of the currently logged in user. Syntax Example
ERROR: Couldn’t connect to Docker daemon at http+docker://localhost – is it running? – Docker Compose Error – How to fix?
ERROR: Couldn’t connect to Docker daemon at http+docker://localhost – is it running? – The reason for this error is you […]
How to restart Kubernetes pods using kubectl?
In this post we will see how to restart your running pods with kubectl. We recommend two methods – rollout restart […]
Get all service accounts using kubectl
To list all service accounts of a namespace we can use kubectl get serviceAccounts -n <namespace> To list all service […]
Get all API versions of your kubernetes cluster using kubectl
To view all API versions supported on the server, in the form of “group/version”, we can use kubectl api-versions command.
How to clear the Material UI text field Value in React?
To clear the Material UI text field Value in React, we can set the value property of the input to an empty […]
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View processes list in tree format in Linux
pstree is a command that shows the running processes as a tree. It is used as a more visual alternative […]
Get home directory of logged in user in Shell
Using a built-in variable: Using a tilde:
Get current user in Shell
Using a built-in variable: Using a command:
Filter on all fields in an array of objects
We know how to filter on an array of objects on specific fields. In some cases we might want to […]
Get the number of processors in Linux and MacOS
This command queries the configured processor values using the getconf command. Example
Replace newline with a space in MySQL
How can the default node version be set using NVM?
To view the list of NVM installed in your machine: To make an NVM version default:
Round a decimal number to nearest decimal that is divisible by 5 in JavaScript
I would like to convert 1.2 to 1.5 and 1.7 to 2. This is basically rounding a decimal number to […]