Nodejs Distance Calculate distanceOfTimeInWords(from, to)

Method Source Code

// This is a manifest file that'll be compiled into including all the files listed below.
// Add new JavaScript/Coffee code in separate files in this directory and they'll automatically
// be included in the compiled file accessible from http://example.com/assets/application.js
// It's not advisable to add code directly here, but if you do, it'll appear at the bottom of the
// the compiled file.
////  w  ww.ja  v  a2  s  . c o  m
//= require jquery
//= require jquery_ujs
//= require_tree .

window.distanceOfTimeInWords = function (from, to) {
  var distance_in_milliseconds = to - from;
  var distance_in_minutes = Math.round(Math.abs(distance_in_milliseconds / 60000));
  var words = "";
  if (distance_in_minutes == 0) {
    words = "less than a minute";
  } else if (distance_in_minutes == 1) {
    words = "1 minute";
  } else if (distance_in_minutes < 45) {
    words = distance_in_minutes + " minutes";
  } else if (distance_in_minutes < 90) {
    words = "about 1 hour";
  } else if (distance_in_minutes < 1440) {
    words = "about " + Math.round(distance_in_minutes / 60) + " hours";
  } else if (distance_in_minutes < 2160) {
    words = "about 1 day";
  } else if (distance_in_minutes < 43200) {
    words = Math.round(distance_in_minutes / 1440) + " days";
  } else if (distance_in_minutes < 86400) {
    words = "about 1 month";
  } else if (distance_in_minutes < 525600) {
    words = Math.round(distance_in_minutes / 43200) + " months";
  } else if (distance_in_minutes < 1051200) {
    words = "about 1 year";
  } else {
    words = "over " + Math.round(distance_in_minutes / 525600) + " years";
  }

  return words;
};

Date.prototype.timeAgoInWords = function() {
  return distanceOfTimeInWords(this, new Date());
};

Date.prototype.untilInWords = function() {
  return distanceOfTimeInWords(new Date(), this);
};

Related

1. distance(lat1, lon1, lat2, lon2)

   function distance(lat1, lon1, lat2, lon2) {
     var R = 6371;
     var a = 0.5 - Math.cos((lat2 - lat1) * Math.PI / 180)/2 + 
        Math.cos(lat1 * Math.PI / 180) * Math.cos(lat2 * Math.PI / 180) * 
        (1 - Math.cos((lon2 - lon1) * Math.PI / 180))/2;
     var m = R * 2 * Math.asin(Math.sqrt(a))*1000;
     return Math.floor(m);
   

2. distance(lat1,lon1,lat2,lon2)

   function distance(lat1,lon1,lat2,lon2) {
     var R = 6371; 
     var dLat = deg2rad(lat2-lat1);  
     var dLon = deg2rad(lon2-lon1);
     var a =
       Math.sin(dLat/2) * Math.sin(dLat/2) +
       Math.cos(deg2rad(lat1)) * Math.cos(deg2rad(lat2)) *
       Math.sin(dLon/2) * Math.sin(dLon/2)
       ;
   ...
   

3. distance(p1, p2)

   function Point(x, y) {
       this.x = x;
       this.y = y;
   function randomPoint() {
       var randomx = randomNumber(WIDTH);
       var randomy = randomNumber(HEIGHT);
       var randomPoint = new Point(randomx, randomy);
       return randomPoint;
   ...
   

4. distance(x1, x2, y1, y2)

   Math.distance = function(x1, x2, y1, y2){
     var x = x2 - x1;
     var y = y2 - y1;
     return Math.sqrt(x * x + y * y);
   };
   

5. distanceBetweenTwoPoints(p1, p2)

   Util.distanceBetweenTwoPoints = function(p1, p2) {
     return Math.sqrt(Math.pow(p2.y - p1.y, 2) + Math.pow(p2.x - p1.x, 2)).toFixed(2);
   };
   

6. getEditDistance(a, b)

   function getEditDistance(a, b){
     if(a.length == 0) return b.length;
     if(b.length == 0) return a.length;
     var matrix = [];
     var i;
     for(i = 0; i <= b.length; i++){
       matrix[i] = [i];
     var j;
   ...
   

7. get_distance (lat1, lon1, lat2, lon2)

   function get_distance (lat1, lon1, lat2, lon2) {
     var R = 6371;
     var dLat = deg2rad(lat2-lat1);
     var dLon = deg2rad(lon2-lon1);
     var lat1 = deg2rad(lat1);
     var lat2 = deg2rad(lat2);
     var a = Math.sin(dLat/2) * Math.sin(dLat/2) +
             Math.sin(dLon/2) * Math.sin(dLon/2) * Math.cos(lat1) * Math.cos(lat2); 
     var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a)); 
   ...
   

8. haversineDistance(lat1, lng1, lat2, lng2)

   var haversineDistance(lat1, lng1, lat2, lng2) {
       var R = 6371; 
       var deltaLat = (lat2-lat1).inRadians();
       var deltaLng = (lng2-lng1).inRadians();
       var a = (Math.sin(deltaLat/2) * Math.sin(deltaLat/2)) + (Math.cos(lat1.inRadians()) * Math.cos(lat2.inRadians()) *
                      Math.sin(deltaLng/2) * Math.sin(deltaLng/2));
       var c = 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1-a));
       return R * c; 
   

9. haversineDistance(lat1, lon1, lat2, lon2)

   function haversineDistance(lat1, lon1, lat2, lon2){
     var R = 6371; 
     var x1 = lat2-lat1;
     var dLat = x1.toRad();  
     var x2 = lon2-lon1;
     var dLon = x2.toRad();  
     var a = Math.sin(dLat/2) * Math.sin(dLat/2) + 
     Math.cos(lat1.toRad()) * Math.cos(lat2.toRad()) * 
     Math.sin(dLon/2) * Math.sin(dLon/2);  
   ...