Enumerable

ruby/spec describes 61 methods in core/enumerable, and Metorex implements 61 of them. The parameters are what Method#parameters answers under Metorex.

Enumerable#all?: implemented, parameters [[:rest, :pattern]]. Returns whether every element meets a given criterion. An example calling it.
Enumerable#any?: implemented, parameters [[:rest, :pattern]]. Returns whether any element meets a given criterion. An example calling it.
Enumerable#chain: implemented, parameters [[:rest, :others]]. Returns an enumerator object generated from this enumerator and given enumerables. An example calling it.
Enumerable#chunk: implemented, parameters [[:block, :block]]. Each element in the returned enumerator is a 2-element array consisting of:
Enumerable#chunk_while: implemented, parameters [[:block, :block]]. Creates an enumerator for each chunked elements. An example calling it.
Enumerable#collect: implemented, parameters [[:block, :block]]. Returns an array of objects returned by the block. An example calling it.
Enumerable#collect_concat: implemented, parameters [[:block, :block]]. Returns an array of flattened objects returned by the block.
Enumerable#compact: implemented, parameters []. Returns an array of all non-nil elements: An example calling it.
Enumerable#count: implemented, parameters [[:rest, :wanted]]. Returns the count of elements, based on an argument or block criterion, if given. An example calling it.
Enumerable#cycle: implemented, parameters [[:rest, :count]]. When called with positive integer argument n and a block, calls the block with each element, then does so again, until it has done so n times; returns nil: An example calling it.
Enumerable#detect: implemented, parameters [[:opt, :ifnone], [:block, :block]]. Returns the first element for which the block returns a truthy value. An example calling it.
Enumerable#drop: implemented, parameters [[:req, :count]]. For positive integer n, returns an array containing all but the first n elements: An example calling it.
Enumerable#drop_while: implemented, parameters []. Calls the block with successive elements as long as the block returns a truthy value; returns an array of all elements after that point: An example calling it.
Enumerable#each_cons: implemented, parameters [[:req, :size]]. Calls the block with each successive overlapped n-tuple of elements; returns self: An example calling it.
Enumerable#each_entry: implemented, parameters [[:rest, :args]]. Calls the given block with each element, converting multiple values from yield to an array; returns self: An example calling it.
Enumerable#each_slice: implemented, parameters [[:req, :size]]. Calls the block with each successive disjoint n-tuple of elements; returns self: An example calling it.
Enumerable#each_with_index: implemented, parameters [[:rest, :args]]. Invoke self.each with *args. An example calling it.
Enumerable#each_with_object: implemented, parameters [[:req, :memo]]. Calls the block once for each element, passing both the element and the given object: An example calling it.
Enumerable#entries: implemented, parameters [[:rest, :args]]. Returns an array containing the items in self: An example calling it.
Enumerable#filter: implemented, parameters [[:block, :block]]. Returns an array containing elements selected by the block. An example calling it.
Enumerable#filter_map: implemented, parameters []. Returns an array containing truthy elements returned by the block. An example calling it.
Enumerable#find: implemented, parameters [[:opt, :ifnone]]. Returns the first element for which the block returns a truthy value. An example calling it.
Enumerable#find_all: implemented, parameters [[:block, :block]]. Returns an array containing elements selected by the block. An example calling it.
Enumerable#find_index: implemented, parameters [[:rest, :wanted]]. Returns the index of the first element that meets a specified criterion, or nil if no such element is found. An example calling it.
Enumerable#first: implemented, parameters [[:rest, :count]]. Returns the first element or elements. An example calling it.
Enumerable#flat_map: implemented, parameters []. Returns an array of flattened objects returned by the block. An example calling it.
Enumerable#grep: implemented, parameters [[:req, :pattern]]. Returns an array of objects based elements of self that match the given pattern. An example calling it.
Enumerable#grep_v: implemented, parameters [[:req, :pattern]]. Returns an array of objects based on elements of self that don't match the given pattern. An example calling it.
Enumerable#group_by: implemented, parameters []. With a block given returns a hash: An example calling it.
Enumerable#include?: implemented, parameters [[:req, :wanted]]. Returns whether for any element object == element: An example calling it.
Enumerable#inject: implemented, parameters [[:rest, :args]]. Returns the result of applying a reducer to an initial value and the first element of the Enumerable. An example calling it.
Enumerable#lazy: implemented, parameters []. Returns an Enumerator::Lazy, which redefines most Enumerable methods to postpone enumeration and enumerate values only on an as-needed basis. An example calling it.
Enumerable#map: implemented, parameters [[:block, :block]]. Returns an array of objects returned by the block. An example calling it.
Enumerable#max: implemented, parameters [[:rest, :count], [:block, :block]]. Returns the element with the maximum element according to a given criterion. An example calling it.
Enumerable#max_by: implemented, parameters [[:rest, :count]]. Returns the elements for which the block returns the maximum values. An example calling it.
Enumerable#member?: implemented, parameters [[:req, :wanted]]. Returns whether for any element object == element: An example calling it.
Enumerable#min: implemented, parameters [[:rest, :count], [:block, :block]]. Returns the element with the minimum element according to a given criterion. An example calling it.
Enumerable#min_by: implemented, parameters [[:rest, :count]]. Returns the elements for which the block returns the minimum values. An example calling it.
Enumerable#minmax: implemented, parameters [[:block, :block]]. Returns a 2-element array containing the minimum and maximum elements according to a given criterion. An example calling it.
Enumerable#minmax_by: implemented, parameters [[:block, :block]]. Returns a 2-element array containing the elements for which the block returns minimum and maximum values:
Enumerable#none?: implemented, parameters [[:rest, :pattern]]. Returns whether no element meets a given criterion. An example calling it.
Enumerable#one?: implemented, parameters [[:rest, :pattern]]. Returns whether exactly one element meets a given criterion. An example calling it.
Enumerable#partition: implemented, parameters []. With a block given, returns an array of two arrays: An example calling it.
Enumerable#reduce: implemented, parameters [[:rest, :args]]. Returns the result of applying a reducer to an initial value and the first element of the Enumerable. An example calling it.
Enumerable#reject: implemented, parameters []. Returns an array of objects rejected by the block. An example calling it.
Enumerable#reverse_each: implemented, parameters [[:block, :block]]. With a block given, calls the block with each element, but in reverse order; returns self: An example calling it.
Enumerable#select: implemented, parameters []. Returns an array containing elements selected by the block. An example calling it.
Enumerable#slice_after: implemented, parameters [[:opt, :pattern], [:block, :block]]. Creates an enumerator for each chunked elements. An example calling it.
Enumerable#slice_before: implemented, parameters [[:opt, :pattern], [:block, :block]]. With argument pattern, returns an enumerator that uses the pattern to partition elements into arrays ("slices"). An example calling it.
Enumerable#slice_when: implemented, parameters [[:block, :block]]. Creates an enumerator for each chunked elements. An example calling it.
Enumerable#sort: implemented, parameters [[:block, :block]]. Returns an array containing the sorted elements of self. An example calling it.
Enumerable#sort_by: implemented, parameters []. With a block given, returns an array of elements of self, sorted according to the value returned by the block for each element. An example calling it.
Enumerable#sum: implemented, parameters [[:rest, :start]]. With no block given, returns the sum of initial_value and the elements: An example calling it.
Enumerable#take: implemented, parameters [[:req, :count]]. For non-negative integer n, returns the first n elements: An example calling it.
Enumerable#take_while: implemented, parameters []. Calls the block with successive elements as long as the block returns a truthy value; returns an array of all elements up to that point: An example calling it.
Enumerable#tally: implemented, parameters [[:rest, :counter]]. When argument hash is not given, returns a new hash whose keys are the distinct elements in self; each integer value is the count of occurrences of each element: An example calling it.
Enumerable#to_a: implemented, parameters [[:rest, :args]]. Returns an array containing the items in self: An example calling it.
Enumerable#to_h: implemented, parameters [[:rest, :arguments], [:block, :block]]. When self consists of 2-element arrays, returns a hash each of whose entries is the key-value pair formed from one of those arrays: An example calling it.
Enumerable#to_set: implemented, parameters [[:rest, :args], [:block, :block]]. Makes a set from the enumerable object with given arguments. An example calling it.
Enumerable#uniq: implemented, parameters [[:block, :block]]. With no block, returns a new array containing only unique elements; the array has no two elements e0 and e1 such that e0.eql?(e1): An example calling it.
Enumerable#zip: implemented, parameters [[:rest, :others]]. With no block given, returns a new array new_array of size self.size whose elements are arrays. An example calling it.

The method summaries are the first sentences of Ruby's own documentation for each method, read from MRI 4.0.6's ri data. Ruby's documentation is distributed under Ruby's license.