Function wrap

Wraps array for grid access. Immutable, such that underlying array is not modified and a call to set returns a new GridArray1d.

const myArray = [
   `a`, `b`, `c`, 
   `d`, `e`, `f` 
];
let g = wrap(myArray, 3);  // 3 columns wide
g.get({ x:1, y:2 });          // Get value at cell position

// Note that `set` returns a new instance
g = g.set(10, { x:1, y:2 });  // Set value at cell position
g.array;                      // Get reference to current array
Copy

Use wrapMutable to modify an array in-place