What this 'map' function does in rails?

Question

Can anyone explain this code:

dates = (from_date..to_date).map(&:to_s)

So that it helps me to do the project!

Thanks in advance!

check https://stackoverflow.com/questions/1217088/what-does-mapname-mean-in-ruby — Metaphox, Aug 10 '17 at 10:51
Why you don't try it by yourself in console, then you will get answer ;) — zauzaj, Aug 10 '17 at 11:27

score 0 · Answer 1 · answered Aug 10 '17 at 11:45

0

Generally map creates a new array containing the values returned by the block. What you are doing here is: defined two function from_date & to_date and which return(I assume) two dates and then converting it to array of date range from from_date to to_date

2.0.0-p648 :010 > date = Date.today.prev_day
 => #<Date: 2017-08-09 ((2457975j,0s,0n),+0s,2299161j)> 
2.0.0-p648 :011 > (date..Date.today).map(&:to_s)
 => ["2017-08-09", "2017-08-10"] 
2.0.0-p648 :012 >

answered Aug 10 '17 at 11:45

Ashish Jambhulkar

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from_data/to_date could also be variables instead of methods. – Pascal Aug 10 '17 at 12:25
yes they can be. – Ashish Jambhulkar Aug 10 '17 at 12:57

What this 'map' function does in rails?

1 Answers1