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

Luqman Shah
Luqman Shah
3,016 Points
Posted by Luqman Shah
Luqman Shah
3,016 Points

My Solution for the Second Challenge

Is this sufficient?

var html = '';
var red;
var green;
var blue;
var rgbColor;

var getNumber

function getRandomNumber() {
  getNumber = Math.floor(Math.random() * 256 );
  return getNumber;
}

for (var i = 0; i < 100; i += 1) {
  red = getRandomNumber();
  green = getRandomNumber();
  blue = getRandomNumber();
  rgbColor = 'rgb(' + red + ',' + green + ',' + blue + ')';
  html += '<div style="background-color:' + rgbColor + '"></div>';
}

document.write(html);

2 Answers

Steven Parker
Steven Parker
231,210 Points
Steven Parker
Steven Parker
231,210 Points

Did it work for you? For me, nothing shows because the created elements have no vertical dimension (height). But that can be easily fixed by printing out the loop value inside each one:

  html += '<div style="background-color:' + rgbColor + '">' + i + '</div>';
Luqman Shah
Luqman Shah
3,016 Points
Luqman Shah
Luqman Shah
3,016 Points

Yeah it actually worked for me.

Steven Parker
Steven Parker
231,210 Points
Steven Parker
Steven Parker
231,210 Points

With what browser (I'm using Chrome)?

Luqman Shah
Luqman Shah
3,016 Points
Luqman Shah
Luqman Shah
3,016 Points

I am also using chrome, here I'll fork it.

Steven Parker
Steven Parker
231,210 Points
Steven Parker
Steven Parker
231,210 Points

Oh, I see! Much different with the CSS! And what you provided was a snapshot, but it allowed me to "fork" it.

Anyway, with that CSS included, your script does the job perfectly as-is. Good job! :+1:

Steven Parker
Steven Parker
231,210 Points
Steven Parker
Steven Parker
231,210 Points

You could take Seamus's suggestion another step and make the code even more compact with an "arrow" function:

var getRandomNumber =_=> Math.floor(Math.random() * 256);
Seamus Sionóid
Seamus Sionóid
27,798 Points
Seamus Sionóid
Seamus Sionóid
27,798 Points

Looks good.

The only minor change I'd make would be to remove the "getNumber" variable. Instead just return the Math.floor() function inside getRandomNumber().