arrayCos function Null safety

Array arrayCos(
  1. Array a
)

Compute the cos for each element of the array

Examples

var n = Array([0.5*pi, pi, (3/2)*pi, 2*pi]);
var cosn = arrayCos(n);

print(cosn);

/* expected output:
Array([6.123233995736766e-17, -1.0, -1.8369701987210297e-16, 1.0])
*/

Implementation

Array arrayCos(Array a) {
  var c = Array.fixed(a.length);
  for (var i = 0; i < a.length; i++) {
    c[i] = cos(a[i]); //fixme parallelize
  }
  return c;
}