third_party/angular/docs/examples/example-example93/script.js

  function Cntl2($scope) {
    var exprs = $scope.exprs = [];
    $scope.expr = '3*10|currency';
    $scope.addExp = function(expr) {
      exprs.push(expr);
    };

    $scope.removeExp = function(index) {
      exprs.splice(index, 1);
    };
  }