Access Operator

Access Operator, or Property Access Operator to be more specific, is to retrieve the value of a property of an object. For example, if we have an object user with a property name, in text-based programming language like Javascript, we can access the value of name by using the . operator:

let user = {
  name: 'Mark',
  phone: '110'
}
user.name

How can we do that in a visual programming language? We can use the . node to achieve the same goal.

Add Node

Right-Click Anywhere on canvas, select Operator/Access

Access Dictionary

A dictionary is like a map, it has keys and for each key, there is one corresponding value, we can access the value of a key by using the . operator. So create a dictionary and input some test data, then use the . operator to access the value of a key.

Compare

The example above shows that text-based programming language takes fewer spaces. This is a major con for visual programming lanuage.

Access Property of an Object Variable

If the data type of the variable is an object, we can use the . operator to access the property of the object.

Note at the top left corner of . node, we show the object's name. This becomes helpful when two nodes are far apart.

Access JSON results from Http response

If the data of an http response is a JSON, we can use the . operator to access the property of the JSON.

Chained Access

We can always chain . operator, provided the previous step returns an Object.