Check if a variable is null or undefined in JavaScript

Use double question mark operator to check if a variable is null or undefined in JavaScript

2 min · Jesstern Rays

Create a favicon for your site

Find or create a suitable favicon for your site

1 min · Jesstern Rays

Create an array from range of numbers

How to create an array of elements based on a range of numbers in JavaScript

2 min · Jesstern Rays

Dig – DNS lookup utility

How to check your domain’s DNS configurations

1 min · Jesstern Rays

Exit a Bash script on error

How to exit a Bash script when any command fails

1 min · Jesstern Rays