Function shallowEqual

shallowEqual<T>(a, b, fn?): boolean
Test whether two arrays are shallowly equal.
Type Parameters
- T
Parameters
- a: ArrayLike<T>
  The first array-like object to compare.
- b: ArrayLike<T>
  The second array-like object to compare.
- Optional fn: ((a, b) => boolean)
  The comparison function to apply to the elements. It should return true if the elements are "equal". The default compares elements using strict === equality.
  - - (a, b): boolean
    - Parameters
      a: T
      b: T
      Returns boolean
Returns boolean
Whether the two arrays are shallowly equal.

Complexity
Linear.

Undefined Behavior
Modifying the length of the arrays while comparing.

Example
```
import { ArrayExt } from '@lumino/algorithm';

let d1 = [0, 3, 4, 7, 7, 9];
let d2 = [0, 3, 4, 7, 7, 9];
let d3 = [42];
ArrayExt.shallowEqual(d1, d2);  // true
ArrayExt.shallowEqual(d2, d3);  // false
```
- Defined in array.ts:643