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..?

instead of day1..day30 you could use arrays. Array of arrays — zerkms
– zerkms, Commented May 15, 2012 at 10:36
your question is not very clear If you have problem with arraysize then try using arrayList — Raheel
– Raheel, Commented May 15, 2012 at 10:39

Bergi · Accepted Answer · 2012-05-15 11:11:01Z

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.

edited May 15, 2012 at 11:11

Bergi

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answered May 15, 2012 at 10:39

RobG

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Comments

Chris Gessler · Accepted Answer · 2012-05-15 10:39:50Z

0

Check out JavaScript's push method.

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

answered May 15, 2012 at 10:39

Chris Gessler

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2 Comments

RobG Over a year ago

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 Over a year ago

ref: w3fools.com for why w3schools might not be the best reference to link to.

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