"Build a Simple Android App (2014)" was retired on August 31, 2016. You are now viewing the recommended replacement.
Heads up! To view this whole video, sign in with your Courses account or enroll in your free 7-day trial. Sign In Enroll
Well done!
You have completed JavaScript Objects!
You have completed JavaScript Objects!
Preview
Use a for...in loop to access each key (or property name) in an object.
Related Discussions
Have questions about this video? Start a discussion with the community and Treehouse staff.
Sign upRelated Discussions
Have questions about this video? Start a discussion with the community and Treehouse staff.
Sign up
Hi again, there are lots of similarities
between arrays and objects.
0:00
Mainly they both provide a way
to store multiple values.
0:00
Arrays store each value in a specific
numeric position called an index, and
0:03
objects store multiple values that can be
accessed using a key or property name.
0:07
Because array elements have numeric index,
a for
0:12
loop is one quick way to access
each element in the array.
0:15
To access data that's inside an object,
0:17
you use a special type of
loop called a for in loop.
0:20
For in iterates or loops over each key or
property name in the object.
0:25
The structure looks like this.
0:29
You need to sign up for Treehouse in order to download course files.
Sign upYou need to sign up for Treehouse in order to set up Workspace
Sign up