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JavaScript

Posted by Jeremy Diallo
Jeremy Diallo
3,846 Points

object property undefined

Hi, I'm having trouble to understand an error in my JavaScript code. Here is my code :

tab = []

var objet = {
    var1: 1,
    var2: 2,
    var3: 3,
    var4: 4,
    var5: 5,
};

for (x in objet)
    tab.push(objet.x);

console.log(tab);

And here's the result : http://image.noelshack.com/fichiers/2015/36/1441435179-sans-titre.jpg

On the other hand, when I try to print object.var1 in the console, I get exactly the property for the value I asked, and when I print x at each step of the loop, I get the actual name of the property...

What's wrong with my code ?

2 Answers

akak
akak
29,446 Points
akak
akak
29,446 Points

To push that object to the array you need to use bracket notation 

for (x in objet)
    tab.push(objet[x]);
Gunhoo Yoon
Gunhoo Yoon
5,027 Points
Gunhoo Yoon
Gunhoo Yoon
5,027 Points

When using for ... in .... loop to retrieve property value always use '[' ']' suffix.

tab = [];

var object = {
    var1: 1,
    var2: 2,
    var3: 3,
    var4: 4,
    var5: 5
};

var x;
for (x in object)
    tab.push(object[x]);

console.log(tab);

I forgot the exact reason but I'll look for it and update the answer, in the meanwhile just take it what it is or search for yourself.