toBeCloseToArray for jasmine 2

gistfile1.js

beforeEach(function() {
    jasmine.addMatchers({
        toBeCloseToArray: function(util, customEqualityTesters) {
          return {
            compare: function(actual, expected, precision) {
              if (precision !== 0) {
                precision = precision || 2;
              }
              var i;
              return {
                pass: _.every(expected, function(v, idx) {
                  i = idx;
                  return Math.abs(actual[idx] - v) < (Math.pow(10, -precision) / 2);
                }),
                message: 'Index ' + i + ', ' + actual[i] +
                  ' should be within ' + (Math.pow(10, -precision) / 2) +
                  ' of ' + expected[i]
              };
            }
          };
        }
    });
  });
  describe('toBeCloseToArray', function() {
    it('should be close', function() {
      expect([1.0, 1.5, 2.0]).toBeCloseToArray([1.001, 1.5, 1.9999]);
      expect([1.0, 1.5, 2.0]).toBeCloseToArray([1.001, 1.5, 1.6], 0);
      expect([1.0, 1.5, 2.0]).toBeCloseToArray([1.001, 1.5, 1.96], 1);
    });
    it('should not be close', function() {
      expect([1.0, 1.5, 2.0]).not.toBeCloseToArray([1.001, 1.5, 1.9999], 10);
      expect([1.0, 1.5, 2.0]).not.toBeCloseToArray([2, 1.5, 1.9], 1);
    });
  });