Why you should care
It is recommended to declare only variables that will be used. At large scale, having a lot of these pattern occurrences could prevent the code from being efficient and cost-effective.
CAST recommends declaring only variables that are effectively used in a program.
How we detect
About CAST and Highlight’s Code Insights
Over the last 25 years, CAST has leveraged unique knowledge on software quality measurement by analyzing thousands of applications and billions of lines of code. Based on this experience and community standards on programming best practices, Highlight implements hundreds of code insights across 15+ technologies to calculate health factors of a software.