DateTime#deconstruct_keys

deconstruct_keys(array_of_names_or_nil) → hash

static VALUE
dt_lite_deconstruct_keys(VALUE self, VALUE keys)
{
    return deconstruct_keys(self, keys, /* is_datetime=true */ 1);
}

Returns a hash of the name/value pairs, to use in pattern matching. Possible keys are: :year, :month, :day, :wday, :yday, :hour, :min, :sec, :sec_fraction, :zone.

Possible usages:

Example

dt = DateTime.new(2022, 10, 5, 13, 30)

if d in wday: 1..5, hour: 10..18  # uses deconstruct_keys underneath
  puts "Working time"
end
#=> prints "Working time"

case dt
in year: ...2022
  puts "too old"
in month: ..9
  puts "quarter 1-3"
in wday: 1..5, month:
  puts "working day in month #{month}"
end
#=> prints "working day in month 10"

Note that deconstruction by pattern can also be combined with class check:

Example

if d in DateTime(wday: 1..5, hour: 10..18, day: ..7)
  puts "Working time, first week of the month"
end

See also #as_json #hour .xmlschema #iso8601 also in 4.1 · 4.0 · 3.4 · 3.2

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