CODEWITHSUNDEEP
javascript
shrewdbeans
shrewdbeans

Reputation: 12529

Can someone explain this return statement for me?

I have a return statement that was used in this Stackover answer, that I can't quite understand. Here it is:

return maxWidth > $this.width() || maxHeight > $this.height();

What does it mean to return something in way?

I'll edit the title of this question after an answer as soon as I know what it is :)

Upvotes: 0

Views: 112

Answers (6)

ultranaut
ultranaut

Reputation: 2140

It's known as short-circuit evaluation, and in this case will return a boolean value. If 

maxWidth > $this.width()

is true, it'll return true, without evaluating the second test. Otherwise it'll return the result of evaluating 

maxHeight > $this.height().

Upvotes: 1

Denys Séguret
Denys Séguret

Reputation: 382102

It returns true if one of the dimension of $this, which is a jQuery wrapper object created as $(this), is smaller than some variables.

In the code you link too, that enables the detection of overflowing as maxWidth and minWidth are the dimensions of the biggest child : if one child is bigger than this, then it is overflowing this.

Have a look at the width function.

Upvotes: 0

Siva Charan
Siva Charan

Reputation: 18064

It returns boolean.

return maxWidth > $this.width() || maxHeight > $this.height();

Assume, 

maxWidth = 300 
$this.width() = 200
maxHeight = 400
$this.height() = 500

so it returns 

(300>200 || 400>500) ==> (T || F) ==> TRUE

Upvotes: 3

Tim Lamballais
Tim Lamballais

Reputation: 1054

In that particular example the code is checking if the biggest child dimension exceeds the parent dimension, the dimensions being width and height.

Upvotes: 1

João Silva
João Silva

Reputation: 91299

It's the equivalent of:

if (maxWidth > $this.width() || maxHeight > $this.height()) {
  return true;
} else {
  return false;
}

In other words, if either maxWidth is greater than the width() of $this or maxHeight is greater than the height() of $this, it will return true; otherwise, it will return false.

Upvotes: 6

zen
zen

Reputation: 122

its a bool value, so if the maximum of width or height is greater than real width, then you get true.

Upvotes: 0

Related Questions