How do I add values in an array when there is a null entry?

Posted by Angela on Stack Overflow See other posts from Stack Overflow or by Angela
Published on 2010-12-27T06:45:03Z Indexed on 2010/12/27 6:53 UTC
Read the original article Hit count: 197

Filed under:

ruby

|

arrays

|

statistics

|

timeseries

I want to create a real time-series array. Currently, I am using the statistics gem to pull out values for each 'day':

define_statistic :sent_count, :count
=> :all, :group => 'DATE(date_sent)',    
:filter_on => {:email_id => 'email_id
> = ?'}, :order => 'DATE(date_sent) ASC'

What this does is create an array where there are values for a date, for example

[["12-20-2010",1], ["12-24-2010",3]]

But I need it to fill in the null values, so it looks more like:

[["12-20-2010",1], ["12-21-2010",0], ["12-22-2010",0], ["12-23-2010",0], ["12-24-2010",3]]

Notice how the second example has "0" values for the days that were missing from the first array.

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