Mark's Monkeypatches
Everybody has a different collection of methods that they feel Ruby's Stdlib and Corelib left out. This repository is mine. Hey, sometimes you gotta patch the monkeys, knamean?
Array Methods
Array#many?
Returns true if array has more than 1 element. If you pass in a block, it returns true if more than 1 element evaluates to true.
Array#rest?
Returns elements except #first
Array#subsets
Returns an array of all subsets of this array.
Array#transform(other_array)
Calls the block, passing in an array transformer.
Comparable Methods
Comparable#max(other)
Returns the greater of self and other.
Comparable#min(other)
Returns the lesser of self and other.
Custom Classes
Duck
A duck is an object with a list of method names. It responds to #===(obj) and #quack?(obj), and returns true if obj responds to all of those methods.
ArrayTransformer
An array transformer manages replacing one array with another. A call to #insert will yield each object inserted, and #remove will yield each object removed. It has a lot more methods.
DateRange
A DateRange is a custom class representing a span of dates. It has multiple methods.
Date Methods
Date#cal
Prints a calendar similar to the unix cal command.
Date#days_in_month
Returns the number of days in the month of this date.
Date#day_of
Returns a DateRange from this date to this date.
Date#end_of_month
Returns the last day of this date's month.
Date#end_of_week
Returns the the last day of this date's week (a Saturday).
Date#month_of
Returns a DateRange from the first day of this date's month, to the last day of this date's month.
Date#start_of_month
Returns the first day of this date's month.
Date#start_of_week
Returns the first day of this date's week (a Sunday).
Date#week_of
Returns a DateRange from the start of this date's week, to the end of this date's week.
Enumerable Methods
Enumerable#hashify
Creates a hash by iterating over the enumerable, passing each element to the block in turn. The results are used as keys to the hash, and the original enumerable becomes the values.
Enumerable#reverse_hashify
Creates a hash by iterating over the enumerable, passing each element to the block in turn. The enumerated items are used as keys to the hash, and the block results becomes the values.
Enumerable#double_hashify
Hash Methods
Hash::of
Returns a new hash where each keys maps to an instance of what the block returns.
Hash::of_arrays
Return a new hash where each key maps to a different array.
Hash::of_hashes
Returns a new hash where each key maps to a different hash.
Hash::of_numbers
Returns a new hash where each key maps to a different number.
Hash#except(*keys)
Creates a new hash with all keys except the keys in the list provided.
Hash#extract(*keys)
Creates a new hash from self with the keys in the list provided. Those keys are then removed from self.
Hash#only(*keys)
Creates a new hash with only the keys included in the list provided.
Hash#resolve(other_hash)
Merges self with other hash. In the event that a key is defined in both hashes, with different values, then the block is called, passing in the key, self's value, and other_hash's value. The result is used as the value in the new hash.
Kernel Methods
duck(*methods)
Return a new duck type on the given keys.
extract_options(args)
Extracts a final options hash argument from the argument list passed in. Returns a pair [ rest of arguments, options hash ]. Options hash is an empty hash if none was provided.
t[*types]
Returns a matcher which === matches elements of arrays in sequence.
Object Methods
Object#another(*args, &block)
Will call .new on the object's class, passing in the arguments and block to the constructor.
Object#duck?(*methods)
Returns true if self responds to all of the given methods.
Object#falsy
Yields if self is falsy (false or nil).
Object#in?(container)
Returns true if container #cover?s or #include?s self.
Object#present?
Opposite of #nil?
Object#required!
Returns self unless self is #nil?, in which case it yields and returns the result.
Object#to_b
Returns true if self is truthy; false if self is falsy.
Object#truthy
Yields is self is truthy (anything except false or nil).
Struct Methods
Struct#make(array)
Creates a new instance of a struct with the arguments in the array.
Struct#parse(filename, options = {})
Parses the provided file as a .csv, making new instances of this struct from the rows.
Options:
:skip_header— if true, ignores the first row.