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Convert a String Containing an Array to an Array in Ruby

Answer 1

+2 A:

While the obvious answer involves eval, this is dangerous. I would instead recommend parsing it. Since this is quite a well defined data format (it seems), you can use this:

myvar.scan(/\d+/).map(&:to_i).each_slice(4).map{|*x,y| [Date.UTC(*x), y]}

this will

pull out all the digits
convert them to integers
separate them into groups of four
apply the first three of each group to Date.UTC as the first through third arguments
pair each date with its corresponding y
create an array containing all of these pairs.

I don't have a Date.UTC method, but I assume you have some custom method called that.

Peter 2010-02-22 04:45:59

Hmm...so Date.UTC is actually a javascript function that i'm trying to embed in the html, and not a function in Ruby. Your solution is technically correct, though provides an error because ruby has no date.utc. Oh well... thanks for the info, i'll likely use it later.

ThinkBohemian 2010-02-25 15:40:20

Answer 2

+1 A:

try eval command

x = eval("[\"foo\",\"bar\",\"land\"]")

=> ["foo", "bar", "land"]

x

=> ["foo", "bar", "land"]

but eval is danger be care full when use it.

Bank 2010-02-22 05:02:37

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Convert a String Containing an Array to an Array in Ruby

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