How to Recursively Delete a Directory in PowerShell
If you want to recursively delete a directory/folder using PowerShell, then you have 2 options.
I needed this when cleaning up build artifacts in a CI …
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In-depth guides, insights, and best practices for modern software engineering
[Solved] npm ERR! could not determine executable to run
If you get the following message, then there’s a very easy fix:
npm ERR! could not determine executable to run
This error usually means your git …
Read Article →[Solved] npm ERR! path node_modules/node-sass
If you get the following error and need a solution, then look no further!
npm ERR! code 1
npm ERR! path ./node_modules/node-sass
npm ERR! command …How to Install Lodash through Yarn for React
You can install lodash through yarn as follows:
Lodash is one of those utility libraries that saves you from writing the same helper functions over …
Read Article →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
package main
import ( …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! …
Read Article →How to Base64 Encode a String in Java
Quick solution
In short, you can just do this:
new String(Base64.getEncoder().encode(bytes));
Examples and an explanation
In Java 8 and above, you …
Read Article →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:
resource …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 is either …
Read Article →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 …
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:
val getAscii = Char::toInt
Option 2:
fun getAscii(c: Char) = c.code …How to update each dependency in package.json to the latest version
You have 2 options:
I use this when starting work on a project that’s been sitting for a while and all the dependencies are outdated. The …
Read Article →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 128 has …
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 …
How to Save sed Output Directly to a File
You have 3 options here:
I needed this when doing bulk find-and-replace across config files in a deployment script. The -i option is the most common …
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: …
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.
pyramid(0) => [ ]
pyramid(1) => …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 - …
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
module.exports = global.config = { …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 Article →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 be {'a': 2, …
How to Increment/Decrement a value in React/NextJS
Use the following code block to get started:
function GetCount() {
const [count, setCount] = useState(1);
const incrementCounter = () => { …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:
user-select: none;
If …
Read Article →Irreducible Sum of Rationals in Golang
The challenge
You will have a list of rationals in the form:
lst = [ [numer_1, denom_1] , ... , [numer_n, denom_n] ]
where all numbers are positive …
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