How to slice arguments without leaking them

slice.js

// Andrea Giammarchi, WTFPL
function slice() {'use strict';
  for (var
    o = +this,                // offset
    i = o,                    // start index
    l = arguments.length,     // length
    n = l - o,                // new length
    a = Array(n < 0 ? 0 : n); // new Array
    i < l; i++
  ) a[i - o] = arguments[i];
  return a;
}

/**
 * @example
(function () {
  slice.apply(0, arguments); // [1,2,3]
  slice.apply(1, arguments); // [2,3]
  slice.apply(6, arguments); // []
}(1,2,3));
 */

This is why leaking arguments is bad

And this is why using apply is safe