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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops The Refactor Challenge Solution

Sean Flanagan
Sean Flanagan
33,235 Points
Posted by Sean Flanagan
Sean Flanagan
33,235 Points

What's wrong with my code?

Hi.

Can anyone tell me please why this code doesn't work?

https://w.trhou.se/gytu08mz1n

Cheers

Sean

2 Answers

Steven Parker
Steven Parker
229,732 Points
Steven Parker
Steven Parker
229,732 Points

The issue is on this line:

  red, green, blue = Math.floor(Math.random() * 256 );

This line probably doesn't do what you think it does. The values for "red" and "green" are evaluated, but nothing is done with or to them. Finally, "blue" is assigned to a random value. You might have been thinking this would assign all 3 at once. You can do that, but with this syntax:

  red = green = blue = Math.floor(Math.random() * 256);

But you probably don't want to do this because by giving them all the same random value, you will get a shade of gray instead of a color.

So what you most likely want here is 3 individual assignments:

  red = Math.floor(Math.random() * 256);
  green = Math.floor(Math.random() * 256);
  blue = Math.floor(Math.random() * 256);
Sean Flanagan
Sean Flanagan
33,235 Points
Sean Flanagan
Sean Flanagan
33,235 Points

I see what you mean.

Thanks Steven.

Sean :-)