In Files

  • json/lib/json/add/time.rb

Parent

Object

Time

Public Class Methods

json_create(object) click to toggle source

Deserializes JSON string by converting time since epoch to Time

 
               # File json/lib/json/add/time.rb, line 9
def self.json_create(object)
  if usec = object.delete('u') # used to be tv_usec -> tv_nsec
    object['n'] = usec * 1000
  end
  if method_defined?(:tv_nsec)
    at(object['s'], Rational(object['n'], 1000))
  else
    at(object['s'], object['n'] / 1000)
  end
end

Public Instance Methods

as_json(*) click to toggle source

Returns a hash, that will be turned into a JSON object and represent this object.

 
               # File json/lib/json/add/time.rb, line 22
def as_json(*)
  nanoseconds = [ tv_usec * 1000 ]
  respond_to?(:tv_nsec) and nanoseconds << tv_nsec
  nanoseconds = nanoseconds.max
  {
    JSON.create_id => self.class.name,
    's'            => tv_sec,
    'n'            => nanoseconds,
  }
end
to_json(*args) click to toggle source

Stores class name (Time) with number of seconds since epoch and number of microseconds for Time as JSON string

 
               # File json/lib/json/add/time.rb, line 35
def to_json(*args)
  as_json.to_json(*args)
end

Additional notes

There are two Time classes. There's one that is part of core Ruby and there is an additional Time class that is part of the standard library.

The standard library Time class extends the core Time class by adding some methods. If you are using the standard library Time class and cannot find documentation for a method, look at the API docs for the core Time class.

Common questions

Q: Given some number of seconds, how can that be converted into minutes and remainder seconds?

A: There are a few ways. Assume we start with 1234 seconds.

    Time.at(1234).strftime "%M:%S"   # This returns a String

If you want numerical values, you can do some basic math: 

    m, s = 1234/60, 1234%60

That second example may be a little too terse for general use. You can wrap it in a method:

    
  def minutes_and_remainder_seconds seconds
    [seconds/60, seconds%60]
  end

  minutes, seconds = *minutes_and_remainder_seconds(1234)

You may want to make this available to multiple classes. You can put it in a module ...

  module TimeUtilities

    def minutes_and_remainder_seconds seconds
      [seconds/60, seconds%60]
    end
    
  end

... and then include that module in those classes that use it: 


   class Foo
     include TimeUtilities

     #  additional class stuff ....
   end

Thanks to Andrey Andreevich Ostapchuck and J Bolton for their suggestions on this.