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JavaScript JavaScript Loops, Arrays and Objects Simplify Repetitive Tasks with Loops The Refactor Challenge, Part 2

Posted by john larson
john larson
16,594 Points

I tried putting the random number function inside the rgb function as a variable...

and I started getting only shades of grey. Can't imagine why. It looks to me like it should do the exact same thing. 

function rgbString(){
  var rgbValue = Math.floor(Math.random() * 256);
  return 'rgb('
    + rgbValue
    + ','
    + rgbValue
    + ','
    + rgbValue
    + ')'
}

var html = "";
for(var i = 0; i < 12; i += 1){
  html +=
  '<p style="background: '
  + rgbString()
  + ';" class="color">'
  + rgbString()
  + '</p>'
}

print(html)



```JavaScript


This code was fine when the random number was in a separate function.  Insights are welcome :D

1 Answer

Steven Parker
Steven Parker
231,275 Points
Steven Parker
Steven Parker
231,275 Points

Your rgbString function gets a single random number and then creates a color where each of the three values is set to that same value. This produces the random grays that you see.

:point_right: To get colors, one or more of the three RGB values must be different from the others.

Perhaps you meant to do something like this:

function rgbString(){
  var rValue = Math.floor(Math.random() * 256);
  var gValue = Math.floor(Math.random() * 256);
  var bValue = Math.floor(Math.random() * 256);
  return 'rgb(' + rValue + ',' + gValue + ',' + bValue + ')';
}