Array callback function should not be used for an array with empty slots.

• UNINVOKED_ARRAY_CALLBACK
• Error
• Medium
• No tags

This rule applies when the Array functions having callback argument are used for an array with empty slots.

When the Array constructor is called with a single number argument, an array with the specified number of empty slots (not actual undefined values) is constructed.

If a callback function is passed to the function of this array, the callback function is never invoked because the array has no actual elements.

Noncompliant Code Example

const list = new Array(5).map(_ => createElement()); // UNINVOKED_ARRAY_CALLBACK alarm

Compliant Code Example

const list = new Array(5).fill().map(_ => createElement());

Version

This rule was introduced in DeepScan 1.12.0-beta.

See

• Array