如何在JavaScript中循环json格式数组变量 [英] How to loop json format array variable in javascript
问题描述
这是我的代码,用于标记我在Google地图中从我的数据库中提取的所有地点。
$ .ajax({
url:http://localhost/church_finder/index.php/MapController/ search_church,
类型:'POST',
data:{coordinates:coordinates}
成功:receiver
});
在这里,我使用从数据库中得到的结果调用接收函数。
函数receiver(data,textStatus,XMLHttpRequest){
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
});
});
$ / code>
这是我从ajax获得的结果数据
[{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}]
但是当我在var特性I中使用forloop出现这样的错误Uncaught SyntaxError:Unexpected token for。
这是您的方法
如何在Google地图中循环并标记所有此坐标
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
});
});
代码中有一些问题
您试图在括号
for-loop[]
var features = [
for(var i = 0; i< json.length; i ++){< b $ b var lat = json [0] [lat];
var lng = json [0] [lng];
{
position:new google.maps.LatLng(lat,lng),
},
}
];
$
您总是会在位置
0
var lat = json [0] [lat];
var lng = json [0] [lng];
您有一个从未被分配给变量的表达式:
{
position:new google.maps.LatLng(lat,lng),
},
^
查看此修正程式码片段
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
});
});
资源
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_church",
type:'POST',
data:{coordinates:coordinates}
success: receiver
});
Here I call the function receiver with the result I got from the database.
function receiver(data, textStatus, XMLHttpRequest) {
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
});
});
}
This is the result data I getting from ajax
[{"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"}]
but when am using forloop inside var feature I got error like this "Uncaught SyntaxError: Unexpected token for". How can i loop and mark all this coordinate in google map.
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
});
});
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