How to add dynamically growing array into another dynamic array

Question

In my project i have arrays for date1, date2 and so on upto one month dates as shown below

var day1= [4,5,6,11];
var day2= [7,8,9,12];
var day3= [10,11,12,14];...
var day30= [1,2, 3, 4];

In the above each array exact size we dont know that may increase or decrease and i need to pass these values to the one more set of arrays like

var data1= [day1[0], day2[0], day3[0]];
var data2= [day1[1], day2[1], day3[1]];
var data3= [day1[2], day2[2], day3[2]];...
var data30= [day1[30], day2[30], day3[30]];

As per the day array size data array size will increase.

How to solve this issue any help..?

• Pranay Rana: 10 question 0 accepted answer.............
• zerkms: instead of day1..day30 you could use arrays. Array of arrays
• Raheel: your question is not very clear If you have problem with arraysize then try using arrayList

Answer 1

Consider using an object instead of variables:

var days = {
 day1: [4,5,6,11],
 day2: [7,8,9,12],
 ... 
 day30: [1,2, 3, 4]
};

Then you can do something like:

var data30 = [];
var i = 0;
while ( days.hasOwnProperty('day' + ++i) ){
 data30.push(days['day' + i]);
}

Though given the sample data, data30 won't have any members because the first array has no member at index 30.

Answer 2

Check out JavaScript's push method.

http://www.w3schools.com/jsref/jsref_push.asp

• RobG: Please don't reference w3schools, reference the appropriate specification (W3C for DOM or ECMAScript for pure language items) and MSDN or MDN if examples seem useful.
• Yoshi: ref: w3fools.com for why w3schools might not be the best reference to link to.