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Convert RGB to Hex in JavaScript

Convert RGB to Hex in JavaScript with the following code snippet.

Gayathri Kumaran 2 days ago Leave a Comment

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.

Update Node.Js To latest version in Ubuntu

To know the current version of node.js / npm installed in your Ubuntu system, run the following command. To see […]

SyntaxError: Cannot use import statement outside a module – node.js error. How to fix?

Since the 14.x version of the Node you can use import to import the modules you need. You can use […]

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client – How to fix?

Error [ERR_HTTP_HEADERS_SENT]: Cannot set headers after they are sent to the client – This error actually means you have already […]

List active connection details in MariaDB

To list active connections and their details in MariaDB we can use the following queries. Using threads_connected Using processlist Using […]

Safe casting in Kotlin

In multiple cases you might’ve came across the situation where you have to cast a global variable and check the […]

Get all deployments under a namespace with kubectl

To get all deployments under a namespace with kubectl, just run the following command. Example

Get container name using pod name with kubectl

To get container name using pod name with kubectl, just run the following command. Example

How to copy files into pods using kubectl?

To copy files into a pod we can use kubectl cp command. Syntax This is very similar to docker cp […]

Unable to connect to the server: x509: certificate signed by unknown authority – kubectl error when connecting to gcloud pods. How to fix?

When you are using your kubectl for the first time you would face this error – Unable to connect to […]

How to Install Kubectl in Ubuntu?

We are going to use the debian package managers to install Kubectl in Ubuntu. Output Output Output Output Output

Get OS version (32 bit or 64 bit) in Linux

To get OS version i.e 32 bit or 64 bit, just run the following command in terminal. This will return […]

How to pass arguments into a Spring boot run?

To pass arguments when you are running a Spring Boot application you can simply assign your parameters to -Dspring-boot.run.arguments To […]

Error: Could not find or load main class org.apache.maven.wrapper.MavenWrapperMain
Caused by: java.lang.ClassNotFoundException: org.apache.maven.wrapper.MavenWrapperMain – How to fix?

When you are using maven as a build tool in your Spring Boot project you will get this error if […]

Dynamic key in MongoDB Node.js Native API

Learn how a key can be dynamic in a MongoDB Node.js native API. In the above code snippet, user_tree is […]

Update all packages in Ubuntu

Updating packages in Ubuntu is sometimes needed to upgrade your Ubuntu to latest version and apply security updates. We can […]

* System restart required * – DigitalOcean Ubuntu droplet warning message. How to resolve?

When you log into your DigitalOcean droplet, you keep getting warning messages about updates and you need to restart your […]

Adding custom Chai assertions to your Cypress tests

Cypress allows you to add custom assertions as Chai plugins and use them in global scope. I found a good […]

Compare JSON objects ignoring the order of the properties in JavaScript

To compare two JSON objects we cannot use equality operators === (in case of JavaScript), == (in case of Java). […]

How to make an Axios DELETE request?

Making a DELETE request in Axios is very similar to making a POST or GET request. Let’s assume we are […]

Remove unused npm modules from package.json

Depcheck is a tool for analyzing the dependencies in a project to see: how each dependency is used, which dependencies […]

What are the possible ways to create objects in JavaScript?

There are many ways to create objects in JavaScript as described below. Object constructor The simplest way to create an […]