Fetching

Эти методы возвращают элементы из перечисляемого объекта, не изменяя его:

Leading, trailing, or all elements:

• to_a (aliased as entries): Returns all elements.
• first: Returns the first element or leading elements.
• take: Returns a specified number of leading elements.
• drop: Returns a specified number of trailing elements.
• take_while: Returns leading elements as specified by the given block.
• drop_while: Returns trailing elements as specified by the given block.

Minimum and maximum value elements:

• min: Returns the elements whose values are smallest among the elements, as determined by #<=> or a given block.
• max: Returns the elements whose values are largest among the elements, as determined by #<=> or a given block.
• minmax: Returns a 2-element Array containing the smallest and largest elements.
• min_by: Returns the smallest element, as determined by the given block.
• max_by: Returns the largest element, as determined by the given block.
• minmax_by: Returns the smallest and largest elements, as determined by the given block.

Groups, slices, and partitions:

• group_by: Returns a Hash that partitions the elements into groups.
• partition: Returns elements partitioned into two new Arrays, as determined by the given block.
• slice_after: Returns a new Enumerator whose entries are a partition of self, based either on a given object or a given block.
• slice_before: Returns a new Enumerator whose entries are a partition of self, based either on a given object or a given block.
• slice_when: Returns a new Enumerator whose entries are a partition of self based on the given block.
• chunk: Returns elements organized into chunks as specified by the given block.
• chunk_while: Returns elements organized into chunks as specified by the given block.