<script type="text/javascript">
var ar = [];
ar["index"].push("data1");
ar["index"].push("data2");
ar["index3"].push("data5");
ar[55].push("data7");
console.log(ar);
</script>
I get: TypeError: ar.index is undefined
with this
ar["index"].push("data1");
javascript tries to push "data1"
into an array. The problem is that it expects an array, which ar["index"]
is not as it is undefined.
You first need to initialize it
ar["index"] = [];
ar["index"].push("data1");
push()
documentation here
just make it like
<script type="text/javascript">
var ar = [];
ar.push("data1");
ar.push("data2");
ar.push("data5");
ar.push("data7");
console.log(ar);
</script>
Here is dev reference api => link
Try this :-
<script type="text/javascript">
var ar = [];
ar["index"] = data1;
ar["index"] = data2;
.........
........
console.log(ar);
</script>
Array accepts the method push
What you wanna do is direct access, like a dictionary style... in this case, setting will just do the trick.
var ar = [];
ar["index"] = "data1";
If you're trying create an array of arrays you must check that the "inner" array exists. Something along the lines of this:
if(ar['index'] == null) {
ar['index'] = [];
ar['index'].push("data1");
} else {
ar['index'].push("data1");
}
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