How To Loop Json Format Array Variable In Javascript

This is my code, using for marking all places that I fetched from my database in google map. $.ajax({ url:'http://localhost/church_finder/index.php/MapController/search_c

Solution 1:

You can't put the for keyword inside of an array, as you are trying to do in features = [ for (...) {} ]. Try this instead:

functionreceiver(data, textStatus, XMLHttpRequest) {

  var json = JSON.parse(data);

  var features = [];
  for (var i = 0; i < json.length; i++) {
    var lat = json[i]["lat"];
    var lng = json[i]["lng"]; 
    // push object into features array
    features.push({ position: new google.maps.LatLng(lat, lng) });
  }

  features.forEach(function(feature) {
    var marker1 = new google.maps.Marker({
      position: feature.position,
      map: map
    });
  });
}

Or, to make it more concise, you can use ES6 Object destructuring with Array.map, like so:

var features = json.map(({lat, lng}) => ({position: new google.maps.LatLng(lat, lng)}));

Solution 2:

This is your approach

var json = JSON.parse(data);

var features = [
    for( var i=0; i<json.length; i++) {
    var lat=json[0]["lat"];
    var lng=json[0]["lng"];
        {
            position: new google.maps.LatLng(lat,lng),
        },
    }
    ];

features.forEach(function(feature) {
        var marker1 = new google.maps.Marker({
            position: feature.position,
            map: map
        });
    });     
} 

There are some issues in your code

You're trying to execute a for-loop within both brackets []

var features = [  
    for( var i=0; i<json.length; i++) { <- Here
    var lat=json[0]["lat"];
    var lng=json[0]["lng"];
        {
            position: new google.maps.LatLng(lat,lng),
        },
    }
    ];
    ^

You're always itetaring with position 0

var lat=json[0]["lat"];
var lng=json[0]["lng"];
             ^

You have an expression that never was assigned to a variable:

{
    position: new google.maps.LatLng(lat,lng),
},
^

Look this code snippet with those fixes

var json = [{"lat":"10.526800731337735","lng":"76.20941162109375"}, {"lat":"10.622100079463674","lng":"76.1424207687378"},{"lat":"10.604004340704408","lng":"76.14100456237793"},{"lat":"10.608644375798574","lng":"76.13735675811768"},{"lat":"10.624419968495433","lng":"76.13675594329834"},{"lat":"10.62436724394038","lng":"76.13685250282288"},{"lat":"10.624377788852131","lng":"76.13693833351135"},{"lat":"10.615815200680679","lng":"76.1367130279541"},{"lat":"10.601726479547619","lng":"76.13688468933105"},{"lat":"10.610500370131295","lng":"76.13244295120239"},{"lat":"10.631991120088175","lng":"76.13566160202026"}];

var features = [];

for (var i = 0; i < json.length; i++) {
  var lat = json[i]["lat"];
  var lng = json[i]["lng"]; 

  features.push({
    position: new google.maps.LatLng(lat, lng),
  });
}

features.forEach(function(feature) {
  var marker1 = new google.maps.Marker({
    position: feature.position,
    map: map
  });
});

Resources

• Loops and iteration