All language subtitles for 11- Exercise 2- Landscape or Portrait

Here is another

exercise. I want you to implement this function.

Function isLandscape, it takes two parameters,

width, and height of an image, and returns true

if the image is landscape, which means width is greater than

height, otherwise it returns false. Now you may think this

is similar to the exercise in the last lecture, in fact it is, but I want you to

do this exercise because I'm going to give you a simple and affective tip to

write better code. So pause the video, do the exercise, and then come back

and continue watching.

Alright, so similar to the last lecture, we can start

with a simple if and else. So if width is greater than

height, you want to return true, otherwise we want to return

false. But I told you that in this case we

can use the conditional operator, so,

we add the condition if width is greater than height,

we can return true, otherwise we'll return false.

And here's our return statement, right? So here's the implementation

of this function, however code like this looks very

amateurish. You don't want to return true or false

explicitly. This is very ugly. Why? Well, let me show you.

We can completely delete this part here

and simply return the value

of this expression. So if width is greater than

height, this expression will be evaluated to true. So,

you will simply return true. Otherwise, if width

is less than height, this expression will evaluate to false, sun will

return false. So there is really no need to explicitly return

true and false here, that's a pour way of writing code.

So, now we have this function, let's test

it. We can do a console.log, simply call this

function here isLandscape, I'm going to pass these dimensions

800 by 600. So we expect true on the

console. Save the changes, here's true, beautiful,

now let's change the width to let's say 300. Now we have

a vertical image. Save. So we get false.