Write the implementation of the diamond function. The single parameter passed // in is the width of the diamond. Even numbers don't generate beautiful // diamonds, nor do negative ones, so return an empty string in those cases.

diamond.js

const diamond = (n) => {
  // your solution
  // weed out negative and even numbers
  if (n <= 0 || n % 2 == 0) return "";

  let k = 0; // to create the count pattern
  let row = parseInt((n + 1) / 2);
  let diamondStructure = [];
  const space = " ";
  const star = "*";
  
  for (let i = 1; i <= n; i++) {
    // if we get to the row, we should count down
    i <= row ? k++ : k--;
    
    const spaceCount = row - k;
    const starCount = n - 2 * spaceCount;
    const diamondLayer = space.repeat(spaceCount) + star.repeat(starCount) + space.repeat(spaceCount);
    diamondStructure.push(diamondLayer);
  }

  const diamond = diamondStructure.join("\n");
  return "\n" + diamond + "\n"; // pad with newline
}