How to Install Lodash through Yarn for React
You can install lodash through yarn as follows: Step 1 – Install Lodash to get the Library Step 2 – Get the Typescript info
How to SHA256 a String in Golang
If you need to SHA256 a String in Go, then you can use the crypto/sha256 package. SHA256 a String in Go The output will look… Read More »How to SHA256 a String in Golang
How to Base64 Encode/Decode in Golang
Go ships with an encoding/base64 package that allows for encode and decoding of Base64 strings. Import the base64 package and then start using it! Base64… Read More »How to Base64 Encode/Decode in Golang
How to Base64 Encode a String in Java
Quick solution In short, you can just do this: Examples and an explanation In Java 8 and above, you just need to import the Base64… Read More »How to Base64 Encode a String in Java
How to add a Lambda Environment Variable in Terraform
If you have an aws_lambda_function block that needs to make use of environment variables, then you can simply do the following: The above example creates… Read More »How to add a Lambda Environment Variable in Terraform
How to perform Array Element Parity in Golang
The challenge You will be given an array of integers whose elements have both a negative and a positive value, except for one integer that… Read More »How to perform Array Element Parity in Golang
How to Reverse Letters in Kotlin
The challenge Given a string str, reverse it omitting all non-alphabetic characters. Examples: For str = “krishan”, the output should be “nahsirk”. For str = “ultr53o?n”, the output should… Read More »How to Reverse Letters in Kotlin
How to Get the ASCII Value of Character in Kotlin
The challenge Get the ASCII value of a character. The solution in Kotlin Option 1: Option 2: Option 3: Test cases to validate our solution
How to update each dependency in package.json to the latest version
You have 2 options: Option 1 – Recommended (Using npx) Option 2 – Older way (Using npm globally)
How to Convert IPv4 to int32 in Javascript
The challenge Take the following IPv4 address: 128.32.10.1 This address has 4 octets where each octet is a single byte (or 8 bits). 1st octet… Read More »How to Convert IPv4 to int32 in Javascript
How to Solve the Grouped by Commas Challenge in Javascript
The challenge Finish the solution so that it takes an input n (integer) and returns a string that is the decimal representation of the number grouped by… Read More »How to Solve the Grouped by Commas Challenge in Javascript
How to Save sed Output Directly to a File
You have 3 options here: Option 1: use tee with sed Option 2: use > with sed Option 3: use sed with -i option
How to Convert BigNumber to Int/Number in Ethers/Web3
If you have a BigNumber when using web3, then you can convert this to a regular Javascript Number using the ethers library as follows: Ethers… Read More »How to Convert BigNumber to Int/Number in Ethers/Web3
How to Create a Pyramid Array in Javascript
The challenge Write a function that when given a number >= 0, returns an Array of ascending length subarrays. Note: the subarrays should be filled with 1s… Read More »How to Create a Pyramid Array in Javascript
How to Create a Reverse Polish Notation Calculator in Javascript
The challenge Your job is to create a calculator which evaluates expressions in Reverse Polish notation. For example expression 5 1 2 + 4 * + 3… Read More »How to Create a Reverse Polish Notation Calculator in Javascript
How to declare a global variable in React?
If you need to declare a global variable in React, then you can do the following: Create a file called config.js Then import the config… Read More »How to declare a global variable in React?
How to Find the Missing Term in an Arithmetic Progression in Javascript
The challenge An Arithmetic Progression is defined as one in which there is a constant difference between the consecutive terms of a given series of… Read More »How to Find the Missing Term in an Arithmetic Progression in Javascript
How to Count Characters in a Javascript String
The challenge The main idea is to count all the occurring characters in a string. If you have a string like aba, then the result should… Read More »How to Count Characters in a Javascript String
How to Increment/Decrement a value in React/NextJS
Use the following code block to get started: Then in your HTML code, add it like this:
How to disable text selection highlighting in CSS
If you would like to disable the text selection highlighting that is enabled by default on all browsers, then you can do this: If you… Read More »How to disable text selection highlighting in CSS
Irreducible Sum of Rationals in Golang
The challenge You will have a list of rationals in the form: where all numbers are positive integers. You have to produce their sum N /… Read More »Irreducible Sum of Rationals in Golang
How to copy S3 objects between AWS accounts
In your source account create a customer-managed policy: In your destination bucket, update the bucket policy: Testing the S3 copy between accounts:
How to find all symlinks in a directory tree on Mac
If you need to recursively find all symbolic links in a directory tree on a Mac, then you have a couple of options. You could… Read More »How to find all symlinks in a directory tree on Mac
How to Install App Mesh on AWS EKS
You can follow the steps below to install App Mesh on AWS EKS (Kubernetes). Step 1 – Prerequisites Step 2 – Add Helm Repo Step… Read More »How to Install App Mesh on AWS EKS
[Solved] Kubernetes Namespace stuck in Terminating state
If you have tried to delete a Kubernetes namespace, and it has been hanging in ‘deleting’ for hours on end, it’s likely that you have… Read More »[Solved] Kubernetes Namespace stuck in Terminating state