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Date_Range.last_index_of

last_index_ofconditionstart

Group: Values

Documentation​

Returns the last index of an element in the range. Returns Nothing if the element is not found.

Arguments​

  • condition: Either the element to search for, a Filter_Condition or a predicate function to test each element.
  • start: The index to start searching backwards from. If the index is negative, it is counted from the end of the range.

Examples​

Find the index of a first day that is a Monday.​

      (Date.new 2020 10 01).up_to (Date.new 2020 10 31) . last_index_of (d-> d.day_of_week == Day_Of_Week.Monday)