Cannot read property of undefined error

Question

I am trying to use an array to get a specific result but i get the error cannot read property of undefined but when i console log that same property i get my result here is my code :

for (var j=0;j<$scope.ftListe.length;j++){
    if(task[j].projet_id==id){
        if(temp!=task[j].NomTache)
            temptache.push(task[j]);
        tempcol.push(lecollaborateur[j]);
    }
    temp=task[j].NomTache;
}
$scope.temptache=temptache;
$scope.tempcol=tempcol;

for(var i=0; i<temptache.length;i++){
    for (var k=0;k<$scope.ftListe.length;i++){
        console.log("l'id de la tache: "+temptache[i].IdTache);
        if(temptache[i].IdTache==$scope.ftListe[k].tacheid){
            temps = temps+$scope.ftListe[k].TempsPasse;
            passe= passe+$scope.ftListe[k].TempsPasse * lecollaborateur[k].CoutParJour;
        }
    }
    tempsAr.push(temps);
    passeAr.push(passe);
    temps=0; passe=0;
}

The property I get the error from is IdTache, what am I doing wrong?

@Dinesh when i console temptache[i].IdTache I get the result with no problems — Jihane
– Jihane, Commented May 29, 2017 at 14:10
If you really want the help, you should provide us with a Plunkr or JSFiddle so we could debug since we can't help like this. — RiesvGeffen
– RiesvGeffen, Commented May 29, 2017 at 14:20

Alon Eitan · Accepted Answer · 2017-05-29 14:51:16Z

2

Please take a look at the following lines:

for(var i=0; i<temptache.length;i++){
    for (var k=0;k<$scope.ftListe.length;i++){

Note that in the inner for loop, you increment the i variable (i++) instead of k. So this make i to get increment in the inner loop to an out of bounds offset.

The JS runtime error prevent your script from going into an Infinite loop - So when you stated that "when i console log that same property i get my result" it actually show the results up until the point where you're in the valid range of the temptache array.

You should fix it to:

for(var i=0; i<temptache.length;i++){
    for (var k=0;k<$scope.ftListe.length;k++){

edited May 29, 2017 at 14:51

answered May 29, 2017 at 14:33

Alon Eitan

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2 Comments

Matheno Over a year ago

Mondays can be rough ... ;-)

Jihane Over a year ago

@AlonEitan , i completely missed that, thank you all

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