26 行目で「 Uncaught TypeError: Cannot read property 'length' of undefined 」が表示されます。コンソールは 24 行目をインデックス 1 の値を持つ配列としてログに記録するため、これが発生する理由はわかりませんが、25 行目は未定義としてログに記録します。
"use strict"
function findpath(G,si,di){
//G is an array of nodes (with id, lat, lon)
var P=[si];
var C=[0,P];
var M=[C];
var O=[];
var ctr=0;
var done = false;
var reached = false;
var best = undefined;
while(!done){
ctr++;
if( ctr > 100 ){
alert("Sorry, can't find the destination.");
return P;
}
for (var i=0;i<M.length;++i){
console.log(P);
console.log(C);
console.log(M[i]);
console.log(M[i[0]]);
var last = M[i[1]].length;
var v = M[i[1[last]]];
//select a random neighbor...
if( v.N.length === 0 ){
alert("Wat?");
return [];
}
else if( v.N.length === 1 ){
break;
}
else if( v === di ){
break;
}
else {
for (var j=0;j<v.N.length;++j){
var temp = M[i];
O.push(temp[1].push(v.N[j]));
var dist = distance(v.lat,v.lon,v.N[j].lat,v.N[j].lon);
var temp2 = O.length-1;
O[temp2[0]]+=dist;
if (v.N[j]===di){
reached = true;
if (best === undefined){
console.log("ASSIGN");
best = O[temp2];
}
else {
if (O[temp2[0]]<best[0]) {
best = O[temp2];
}
}
}
}
}
}
M = O;
var any = false;
for (var i=0;i<M.length;++i) {
if (M[i[0]]<best[0]) {
any = true;
}
}
if (!any) {
done = true;
}
}
//return the path
return best[1];
}
function distance(x1,y1,x2,y2){
return Math.sqrt(Math.pow((x2-x1),2)+Math.pow((y2-y1),2));
}
出力:
Array[1] findpath.js:22
Array[2] findpath.js:23
Array[2]
0: 0
1: Array[1]
0: 13
length: 1
__proto__: Array[0]
length: 2
__proto__: Array[0] findpath.js:24
undefined findpath.js:25
Uncaught TypeError: Cannot read property 'length' of undefined findpath.js:26