d3 time format for YYYY-MM-DD ie. 2013-02-04

Question

I am getting

Uncaught TypeError: Cannot read property 'length' of undefined

from my console at this line

var parseDate = d3.time.format("%Y-%m-%d").parse;

data.forEach(function(d) { d.Day = parseDate(d.Day); });

here is how my date is formatted in my json object day: "2013-02-04"

Can you try using an alternative approach http://stackoverflow.com/questions/2587345/javascript-date-parse ? I usually use something like `Date(Date.parse("2005-07-08"));`. — user1477388, Feb 04 '13 at 17:54
Sounds like the error message is coming from somewhere else. Can you post a complete minimal example? — Lars Kotthoff, Feb 04 '13 at 18:38
Is the lowercase 'day' in the object a mistake? Or is it supposed to be 'Day' as in the reference? — cmonkey, Feb 04 '13 at 18:47
yeah, this was correct @cmonkey it was supposed to be lowercase day. I have another problem now — CQM, Feb 04 '13 at 18:51

score 6 · Accepted Answer · answered Feb 04 '13 at 18:50

I suspect the case of 'day' is incorrect. I can execute:

var parseDate = d3.time.format("%Y-%m-%d").parse;
parseDate( "2013-02-03" )

Without issue (it shows the correct Date). Likely, you need to change the code to:

data.forEach(function(d) { d.day = parseDate(d.day); });

(note, lowercase 'd' in 'day')

1 Answers1