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  1. Practice
  2. Algorithms
  3. Warmup
  4. Diagonal Difference
  5. Discussions

Diagonal Difference

  • lemueluhuru + 3 comments

    Nice. You can remove the conditional though, and complete this in one loop. Here is my solution in JavaScript. 

    let primaryDiag = 0
let secondDiag = 0
let length = Matrix.length

for (var i = 0, indexLength = length - 1; i < length; i++) {
    primaryDiag += Matrix[i][i]
    secondaryDiag += Matrix[i][indexLength]
    indexLength -= 1 
}

return Math.abs(primaryDiag - secondaryDiag)
    • tinla14 + 0 comments

      Hello lemuel,

      Can you please explain more to me about this????

    • jonathan_m_whit1 + 0 comments

      I altered a little. 

      function diagonalDifference(arr) {  
        let primDiag = 0
        let secDiag = 0
        let n = arr.length

        for (var i = 0, j = n - 1; i < n; i++, j--) {
                primDiag += arr[i][i]
                secDiag += arr[i][j]  
        }
        return Math.abs(primDiag - secDiag)

      }

    • suhailmdcse + 0 comments

      super!! logic