isArray#

Check if the given value is an array.

Usage Scenarios#

• Data Validation : When processing user input or data returned by an API, you need to ensure that a certain value is an array before performing subsequent array operations, such as iteration, filtering, etc.
• Function Parameter Validation : In a function, when an array is expected as a parameter, you can use the isArray method to verify the parameter type, avoiding errors caused by passing non - array values.
• Conditional Judgment : Execute different logic based on whether a value is an array.

Examples#

import { isArray } from 'funtool';

isArray('hello'); // ❌ false
isArray([]); // ✅ true

Signature#

function isArray<T = any>(v: any): v is T[]

Parameters#

• v (any): The value to test if it is an array.

Returns#

• (v is any[]): Returns true if the value is an array, otherwise returns false.