Function mutable

mutable<V>(opts?: StackOpts, ...startingItems: readonly V[]): IStackMutable<V>
Creates a stack. Mutable. Use Stacks.immutable for an immutable alternative.
Type Parameters
- V
Parameters
- opts: StackOpts = {}
- ...startingItems: readonly V[]
Returns IStackMutable<V>
Example: Basic usage
```
// Create
const s = Stacks.mutable();
// Add one or more items
s.push(1, 2, 3, 4);

// See what's on top
s.peek;  // 4

// Remove the top-most, and return it
s.pop();   // 4

// Now there's a new top-most element
s.peek;  // 3
```