MutableArray#removeAt()

Remove an object at the specified index using the replace() primitive method. You can pass either a single index, or a start and a length.

If you pass a start and length that is beyond the length this method will throw an OUT_OF_RANGE_EXCEPTION.

let colors = ['red', 'green', 'blue', 'yellow', 'orange'];

colors.removeAt(0);     // ['green', 'blue', 'yellow', 'orange']
colors.removeAt(2, 2);  // ['green', 'blue']
colors.removeAt(4, 2);  // Error: Index out of range