CODEWITHSUNDEEP
javascriptnode.js
jay
jay

Reputation: 85

Adding an array of hex values together

I have an array of hex values in node js that has hex values such as this: ['2ea','1b1'...]. The array does not have a fixed amount of values. The amount of values can change each time. I have been trying to come up with a for loop that would add the hex values up. But it isnt working. Please help. The code below is not correct. 

for (var i=0; i<checkSumArray.length; i++) {
  function CheckSumFinal(c1, c2) {
        var hexStr = (parseInt(c1, 16) + parseInt(c2, 16)).toString(16);
        return hexStr;
      }

      var n7= CheckSumFinal(checkSumArray[i], checkSumArray[i+1]);

    }

Upvotes: 1

Views: 1553

Answers (2)

adeneo
adeneo

Reputation: 318342

Keep the variables outside the loop, and just add up inside the loop

var checkSumArray = ['2ea','1b1', 'fff', '4a1', '1e1'],
    hexStr = 0;

for (var i=0; i<checkSumArray.length; i++) {
    hexStr += parseInt(checkSumArray[i], 16);
}

hexStr = hexStr.toString(16);

document.body.innerHTML = '<pre>' + hexStr + '</pre>'

Upvotes: 2

r0dney
r0dney

Reputation: 745

For calculating sums over an array reduce would be perfect. The idea is to calculate the sum first and just convert the final answer to base16 string.

checkSumArray.reduce(function(p, c){
  return p + parseInt(c, 16);
}, 0).toString(16);

Upvotes: 3

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