gistfile1.txt

// given a certain state, return the value of a variable
// STATE:
// variables: [a, b, c]
// values: { a: 5, b: a, c: 1 }
//
// value_of: b
value_of(variable) {
    var val_vars = Object.keys(this.values);
    if (variable.name != 'undefined' && val_vars.indexOf(variable.name) !== -1) {
      var val = this.values[variable.name]
      return this.value_of(val);
    } else {
      return variable;
    }
  }