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Node.js Basics 2017

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Parsing JSON

2:13 with Andrew Chalkley

We have the response body as a String. Let's convert it into an Object we can access the data more programmatically.

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    We have the string printing out, but 0:00
    we want to access the properties programmatically. 0:02
    We want to convert the string into an object. 0:05
    The process of converting a string into a data structure is called parsing. 0:09
    You may not know this, but if you look at the documentation to parse JSON, 0:13
    it can't be found as a host object in the Node.js environment, 0:17
    it's actually a native object. 0:21
    A good reference for native objects is the Mozilla Developer Network. 0:24
    I've included a link in the teacher's notes. 0:28
    As you can see, there's a method called parse. 0:31
    You can pass in a string to get parsed into a JSON object. 0:34
    Let's add the functionality to our code. 0:39
    We'll store the object as a constant variable called Profile. 0:41
    We can use console.dir, To take a look inside the profile. 0:56
    We can use the DIR output to figure out how many number of badges we've got and 1:05
    how many points in the JavaScript topic area. 1:09
    We have a badges array, so we can print out the message. 1:17
    Profile.badges.length, which will be our badge count. 1:26
    Finally, we have a points object that is segmented into each topic area. 1:36
    We want the JavaScript points. 1:43
    So we can do profile.points.JavaScript. 1:46
    Let's try this out and see what happens. 2:01
    There I am with my badge count and JavaScript points. 2:06

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