Paiza p5, given n rectangle coords within a matrix, calculate the sum of every number inside the area composed by all of the n rectangles (removing duplicate/collisions between rectangles)

Paiza_5.js

var line = "4 5 3\n948 608 920 216\n3 413 306 7\n312 173 0 1000\n365 726 280 358\n26 539 197 753\n2 1 3 3\n3 3 4 4\n1 4 4 5 "
var input = line.split(/\n/);


// Remove first line (info) and get it's info.
matrix_data = input.shift().split(" ");
matrix_sizex = matrix_data[0];
matrix_sizey = matrix_data[1];
matrix_sizeSelection = matrix_data[2];

// Remove \n's 
input = input.filter(function (element) {
  return !element.match(/\n/);
});

// Separate the input into a array.
var inputCleanArray = [];
for (var i = 0; i < input.length; i++) {
  inputCleanArray[i] = input[i]
    .split(/\s/)
    .filter(function (element) {
      return !element.match(/\s/);
    })
}

// Values matrix.
var valuesMatrix = inputCleanArray.slice(0, matrix_sizey)

// Selection .
var selections = inputCleanArray.slice(matrix_sizey, input.length) 


// Divide matrix into top-bootom x,y pairs
var selectionArray = []
for (var i = 0; i < selections.length; i++) {
  selectionArray.push({
    top: {
      x: +selections[i][0],
      y: +selections[i][1]
    },
    bottom: {
      x: +selections[i][2],
      y: +selections[i][3]
    }
  });
}

// Find every coord touched by selections
var coordsCollection = [];
selectionArray.forEach(function(selection){
  console.log(selection)
  for(var x = selection.top.x; x <= selection.bottom.x; x++){
    for(var y = selection.top.y; y <= selection.bottom.y; y++){
      coordsCollection.push([x,y])
    }
  }
});


// Remove duplicates
coordsCollection = uniq(coordsCollection)

// Sum all values in the area.
var total = 0;
coordsCollection.forEach(function(coord){
  total += +valuesMatrix[coord[1]-1][coord[0]-1]
})

console.log(total)


function uniq(arr) {
  var seen = {};
  var result = [];
  var len = arr.length;
  
  for (var i = 0; i < len; i++) {
    var el = arr[i];
    if (!seen[el]) {
      seen[el] = true;
      result.push(el);
    }
  }

  return result;
}