abc.js

let arr = [{lat:12.931496,lng:77.678845},{lat:12.931796,lng:77.678836},{lat:12.931665,lng:77.678551},{lat:12.9312,lng:77.679135},{lat:12.931267,lng:77.678317},{lat:12.931181,lng:77.678961},{lat:12.931496,lng:77.678845},{lat:12.931062,lng:77.678977},{lat:12.930857,lng:77.679111},{lat:12.931685,lng:77.678334},{lat:12.931496,lng:77.678845},{lat:12.931645,lng:77.678632},{lat:12.931496,lng:77.678845},{lat:12.931257,lng:77.678424},{lat:12.931495,lng:77.678844},{lat:12.931484,lng:77.678748},{lat:12.931596,lng:77.678864},{lat:12.931496,lng:77.678845},{lat:12.931496,lng:77.678845},{lat:12.931135,lng:77.678991},{lat:12.931535,lng:77.678648},{lat:12.931496,lng:77.678845},{lat:12.931563,lng:77.678339},{lat:12.930968,lng:77.678944},{lat:12.930901,lng:77.678908},{lat:12.9312,lng:77.679135},{lat:12.931496,lng:77.678845},{lat:12.931796,lng:77.678836},{lat:12.931496,lng:77.678845},{lat:12.931551,lng:77.678958},{lat:12.931718,lng:77.67837},{lat:12.931556,lng:77.678746},{lat:12.931496,lng:77.678845},{lat:12.931496,lng:77.678845},{lat:12.931287,lng:77.679432},{lat:12.931665,lng:77.678551},{lat:12.9318972,lng:77.6784902},{lat:12.931718,lng:77.678529},{lat:12.931665,lng:77.678551},{lat:12.931796,lng:77.678836},{lat:12.931665,lng:77.678551},{lat:12.9312,lng:77.679135},{lat:12.9312,lng:77.679135},{lat:12.93192,lng:77.679116},{lat:12.931796,lng:77.678836}]

// let customerName = cust[key]['customer_name'];
// let instructions = cust[key]['instructions'];
// let flat = cust[key]['customer_address'].flat;
// let building = cust[key]['customer_address'].building;
// let area = cust[key]['customer_address'].area;
// let city = cust[key]['customer_address'].city;

let earth_radius = 6378.0;

function distanceEarth(lat1d, lat2d, lon1d, lon2d)
{
    let lat1, lon1, lat2, lon2,
           delta_lon, central_ang;

    lat1 = degtorad(lat1d);
    lon1 = degtorad(lon1d);
    lat2 = degtorad(lat2d);
    lon2 = degtorad(lon2d);
    if(lat2 > lat1) [lat1, lat2] = [lat2, lat1];
    if(lon2 > lon1){
      delta_lon = lon2 - lon1;
    }
    else{
      delta_lon = lon1 - lon2;
    }
    // great circle distance formula. 
    central_ang = Math.acos ( Math.sin(lat1) * 
                  Math.sin(lat2) + Math.cos(lat1) * 
                  Math.cos(lat2) * Math.cos(delta_lon) );  
                    
    return (earth_radius * central_ang * 1000); 
}
function degtorad(deg)
{
    return ( deg * Math.PI / 180);
}


let latitude = 0, longitude = 0;
let n = arr.length;

let coords = [];

for(let i=0; i<n; i++){
  let temp = [];
  for(let j=0; j<n; j++){
    temp.push(distanceEarth(arr[i].lat, arr[j].lat, arr[i].lng, arr[j].lng));
  }
  coords.push(temp);
}


// console.log(lat_avg, lng_avg);
// console.log(coords);

let coordinates =[
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     37.03155779447229,  104.43512210859835, 0.09503960609436035,
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     34.18692338795673, 0.09503960609436035,   81.81624023892184,
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     58.96026145780986,  40.65829449688893, 114.55572812117447,
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     39.17200071881363, 26.676349415801777, 104.48596547512383,
    104.48596547512383,  67.94281666675445,  39.17200071881363
  ],
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      87.4508989603486,    67.5389985284675, 34.420742266843845
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     37.03155779447229,   34.18692338795673, 0.09503960609436035,
     81.81624023892184,   51.06263205704392,   69.86755696651956,
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  ],
  [
     33.40936182736597,                  0,  34.18692338795673,
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     33.40936182736597,  85.97460531401438,  34.18692338795673,
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                     0,  34.18692338795673,   73.8511556478229,
      73.8511556478229,  33.36729449475762,                  0
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     41.40477638697952,                  0, 45.559175932713885,
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      73.8511556478229,  81.81624023892184,                  0,
                     0,  80.17479432495617,   73.8511556478229
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     41.40477638697952,                  0, 45.559175932713885,
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      73.8511556478229,  81.81624023892184,                  0,
                     0,  80.17479432495617,   73.8511556478229
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     80.17479432495617, 0.09503960609436035,  33.36729449475762
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  [
     33.40936182736597,                  0,  34.18692338795673,
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     33.40936182736597,  75.47778414378277, 35.498787778374975,
     33.40936182736597,  59.83511246492923,  92.91243187122822,
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     33.40936182736597,  85.97460531401438,  34.18692338795673,
     39.17200071881363, 34.420742266843845,  34.18692338795673,
                     0,  34.18692338795673,   73.8511556478229,
      73.8511556478229,  33.36729449475762,                  0
  ]
];

let ab = {};
let d = Math.round((arr[0].lat * 3 + arr[0].lng * 2));
let obj = {d : d};
let obj1 = {d : d};

ab[1] = 2;
ab[4] = 4;

console.log(ab);
console.log(Object.keys(ab).length);
delete ab[1];
console.log(ab);
console.log(Object.keys(ab).length);

let gt = {};

for(let i = 0; i<n; i++){
  for(let j=i; j<n; j++){
    let key = i*n + j;
    if(key in gt){
      gt[key].push(coords[i][j]);
    }
    else{
      gt[key] = [coords[i][j]];
    }

  }
}
let graph = {};
for(let key in gt){
  let temp = [];
  for(let x in gt){
    let obj = {};
    if(x != key){
      obj[x] = gt[x];
      temp.push(obj);
    }
  }
  graph[key] = temp;
}

console.log(graph);

// function dijkstra(s){
//   let dist = {};
//   let prev = new Set();

//   let st = {};
//   dist[s] = 0;
//   st[dist[s]] = s;

//   while(Object.keys(ab).length > 0){
//     let d , u;
//     for(let key in ab){
//       d = key;
//       u = ab[key];
//       break;
//     }

//     for(let x in graph[key]){
//       for(let key2 in graph){

//       }
//     }

//   }
// }