Question

js中的for循环,循环次数会多出一次。当循环到最后一个的时候，循环还会继续，并且此时i就变成remove？

function drawLine() {
var isZoom = false;
var str = "39.917 116.397,39.95970557 116.31800626,40.0434876 116.33688445";
var points = str.split(",");
var markers = [];
var pos = [];
var bb = new hollymapsupport.handle.bounds(map);
for (i in points) {
if(i=="remove") break;
var point = points[i].split(" ");
var myPoint = new hollymapsupport.point(point[0], point[1],
null);
pos.push(myPoint);
var m = map.addMarker(myPoint, "划线点" + i, true, null, null)
markers.push(m);
drawMarkerList.push(m);
ma.push(m);
if (isZoom) {
bb.extend(myPoint);
}
}
drawLineList.push(hollymapsupport.draw.beeline(map, markers));
};
function drawLine() {
var isZoom = false;
var str = "39.917 116.397,39.95970557 116.31800626,40.0434876 116.33688445";
var points = str.split(",");
var markers = [];
var pos = [];
var bb = new hollymapsupport.handle.bounds(map);
for (i in points) {
if(i=="remove") break;
var point = points[i].split(" ");
var myPoint = new hollymapsupport.point(point[0], point[1],
null);
pos.push(myPoint);
var m = map.addMarker(myPoint, "划线点" + i, true, null, null)
markers.push(m);
drawMarkerList.push(m);
ma.push(m);
if (isZoom) {
bb.extend(myPoint);
}

}
drawLineList.push(hollymapsupport.draw.beeline(map, markers));
};

Answer 1

for (i in points) 改成 for(var i = 0; i < points,length; i++)

Answer 2

我的也出现这种现象，但是不知道为什么，最后我也改为 i++ 这种了 ，我想问一下 xiaoji123pt 你知道原因不