push value to a specific element in array

Question

I'm trying to push values into specific elements by creating a multidimensional array:

var rate_info = [];
rate_info[0].push($("#title-textarea"+id).val());
rate_info[0].push($("select[name=category"+id+"]").val());
rate_info[0].push($("select[name=subcategory"+id+"]").val());
...
data: {
    "rate_info" : rate_info,
},
...

but this breaks my script and I'm not sure what I'm doing wrong

Please explain the part of "breaks my script". What is the error? where does it fail? — Ravi Y
– Ravi Y, Commented Dec 5, 2012 at 9:35
when I try without creating multidimensional array (rate_info.push instead of rate_info[0]) it works. But I want to push the values into rate_info at position [0] since I got mroe values coming after it in the next iteration to go into rate_info[1] 2 3 etc. — user1683645
– user1683645, Commented Dec 5, 2012 at 9:37

VisioN · Accepted Answer · 2012-12-05 09:35:38Z

4

No need in indexing, just push to the array:

rate_info.push($("#title-textarea"+id).val());
rate_info.push($("select[name=category"+id+"]").val());
rate_info.push($("select[name=subcategory"+id+"]").val());

Otherwise you need to create a new array first to be able to push elements to it:

var rate_info = [ [] ];
rate_info[0].push($("#title-textarea"+id).val());

answered Dec 5, 2012 at 9:35

VisioN

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3 Comments

Ravi Y Over a year ago

The OP mentioned multi dimensional array. I guess OP is using an array of arrays here, and thats why the indexing.

Laz Karimov Over a year ago

+1 And if you want to make it multidimensional rate_info.push(some_array)

user1683645 Over a year ago

Okay I go with this solution create arrays each iteration and push into rate_info array. Thanks!

jabclab · Accepted Answer · 2012-12-05 09:37:34Z

2

As you're using a multidimensional array you need to make sure that rate_info[0] is an array so it's possible to push to it, i.e.

rate_info[0] = [];

Before attempting to do the push calls. At the moment you're attempting to push to undefined.

answered Dec 5, 2012 at 9:37

jabclab

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