[MacRuby-devel] MacRuby 0.9 - NSDate initWithTimeInterval:sinceDate: problem

[Alan Skipp]

I think you've just managed to get your variable names mixed up. You've used 'cocoaFinishTime' where you should have used 'cocoaTime'

last line should be:
puts "Cocoa Later time: #{cocoaFinishTime}, interval: #{cocoaFinishTime.timeIntervalSinceDate(cocoaTime)} seconds"

al


On 13 Feb 2011, at 16:42, Jonathan Waddilove wrote:

> Hi, I have been trying to use the NSDate initWithTimeInterval:sinceDate: method to measure elapsed times.
> 
> I know there has been some discussion about the mapping from Cocoa NSDate to Ruby Time and back but I'm not sure if this is supposed to be working now?
> 
> Here's a snip of code that calculates the interval using Ruby Time and then NSDate
> 
> #!/usr/local/bin/macruby
> puts "Ruby Version: #{RUBY_VERSION}, MacRuby Version: #{MACRUBY_VERSION}"
> 
> puts "\n\nRuby vesion - works as expected"
> point_in_time = Time.now
> puts "Ruby start time #{point_in_time}"
> sleep(1)
> later_time = Time.now
> puts "Later time: #{later_time}, interval: #{later_time - point_in_time} seconds"
> 
> puts "\n\nFailing Cocoa version"
> cocoaTime = NSDate.date
> puts "Coca start time: #{cocoaTime}"
> sleep(1)
> cocoaFinishTime = NSDate.date
> puts "Cocoa Later time: #{cocoaFinishTime}, interval: #{cocoaFinishTime.timeIntervalSinceDate( cocoaFinishTime)} seconds"
> 
> 
> And here's the output, note the NSDate sees zero intervale...
> Ruby Version: 1.9.2, MacRuby Version: 0.8
> 
> 
> Ruby vesion - works as expected
> Ruby start time 2011-02-13 16:33:23 +0000
> Later time: 2011-02-13 16:33:24 +0000, interval: 1.000694 seconds
> 
> 
> Failing Cocoa version
> Coca start time: 2011-02-13 16:33:24 +0000
> Cocoa Later time: 2011-02-13 16:33:25 +0000, interval: 0.0 seconds
> 
> User error? or do I need to file a ticket?
> 
> Best wishes and thanks, Jonathan
> 
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