var marker1, map, route, timerhandle;
var timers = [];
var speeds = 300;
var lastpos;
var counter = 0;
var array2 = [];
var cleared = false;
var polies = [];
function increaseSpeed() {
speeds = speeds - 10;
for (var i = 0; i < timers.length; i++) {
clearTimeout(timers[i]);
}
marker1.setMap(null);
marker1.setPosition(array2[array2.length - 1]);
var latlng2 = new google.maps.LatLng(pathCoords[counter + 1].lat, pathCoords[counter + 1].lng);
route.getPath().push(latlng2);
autoRefresh(map);
}
function initialize() {
map = new google.maps.Map(document.getElementById("map"), {
center: {
lat: pathCoords[0].lat,
lng: pathCoords[0].lng
},
zoom: 13,
mapTypeId: google.maps.MapTypeId.ROADMAP
});
var marker = new google.maps.Marker({
position: new google.maps.LatLng(8.893260000000001, 76.61427),
map: map
});
var marker = new google.maps.Marker({
position: new google.maps.LatLng(8.52426, 76.93668000000001),
map: map,
icon: 'http://maps.google.com/mapfiles/ms/micons/blue.png'
});
//autoRefresh(map);
}
function moveMarker(map, marker1, latlng) {
marker1.setPosition(latlng);
map.panTo(latlng);
}
function autoRefresh(map) {
var i;
route = new google.maps.Polyline({
path: [],
geodesic: true,
strokeColor: '#000000',
strokeOpacity: 1.0,
strokeWeight: 2,
editable: false,
map: map
});
polies.push(route);
marker1 = new google.maps.Marker({
map: map,
icon: 'http://maps.google.com/mapfiles/ms/micons/blue.png'
});
for (i = 0; i < pathCoords.length; i++) {
var timerhandle = setTimeout(function () {
counter++;
var latlng = new google.maps.LatLng(pathCoords[counter].lat, pathCoords[counter].lng);
array2.push(latlng);
route.getPath().push(array2[array2.length - 1]);
moveMarker(map, marker1, array2[array2.length - 1]);
}, speeds * i, pathCoords[i]);
timers.push(timerhandle);
}
}
function stop() {
for (var i = 0; i < timers.length; i++) {
clearTimeout(timers[i]);
}
route.setMap(null);
marker1.setMap(null);
marker1 = [];
cleared = true;
counter = 0;
speeds = 300;
for (k = 0; k < polies.length; k++) {
polies[k].setMap(null); //or line[i].setVisible(false);
}
}
var pathCoords = [{
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"lng": 76.61427
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}, {
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}, {
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}, {
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psql中的这个正确查询是否可以修改列的数据类型？
答案 0 :(得分：0)
不，您需要加入ALTER TABLE user_login ALTER COLUMN dob TYPE date
。它应该是
ADD COLUMN请参阅documentation。您可能会对TYPE感到困惑，您可以在其中省略new。