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Ruby Array and String Cheat Sheet by

List of all available methods for ruby array and string.

Array predicates

#all?
#any?
#empty?
#eql?
#include?
#none?
#one?

String predicates

#ascii­_only?
#casecmp?
#casecmp
#empty?
#end_with?
#eql?
#include?
#match?
#match
#start­_with?
#unico­de_­nor­mal­ized?
#valid­_en­coding?

Array conver­sions

#old_to_s
#to_a
#to_ary
#to_h
#to_s

String conversion

#to_a
#to_c
#to_f
#to_i
#to_r
#to_s
#to_str
#to_sym

Array common

#each
#each_­index
#filter
#filter!
#find_­index
#first
#join
#length
#map
#map!
#last
#max
#min
#pop
#prepend
#reverse
#reverse!
#sample
#slice
#slice!
#sort
#sort!
#sort_by!

String common

#capit­alize
#capit­alize!
#downcase
#downcase!
#freeze
#gsub
#gsub!
#length
#prepend
#reverse
#reverse!
#slice
#slice!
#split
#chars
#upcase
#upcase!
 

String uncommon

#b
#bytes
#bytesize
#byteslice
#center
#chomp
#chomp!
#chop
#chop!
#chr
#clear
#codep­oints
#concat
#count
#crypt
#delete
#delete!
#delet­e_p­refix
#delet­e_p­refix!
#delet­e_s­uffix
#delet­e_s­uffix!
#dump
#each_byte
#each_char
#each_­cod­epoint
#graph­eme­_cl­usters
#each_­gra­phe­me_­cluster
#each_line
#encode
#encode!
#encoding
#force­_en­coding
#getbyte
#hash
#hex
#index
#initi­ali­ze_copy
#insert
#inspect
#intern
#lines
#ljust
#lstrip
#lstrip!
#next
#next!
#oct
#ord
#partition
#replace
#rindex
#rjust
#rpart­ition
#rstrip
#rstrip!
#scan
#scrub
#scrub!
#setbyte
#size
#squeeze
#squeeze!
#strip
#strip!
#sub
#sub!
#succ
#succ!
#sum
#swapcase
#swapcase!
#tr
#tr!
#tr_s
#tr_s!
#undump
#unico­de_­nor­malize
#unico­de_­nor­malize!
#unpack
#unpack1
#upto
 

Array uncommon

#append
#assoc
#at
#bsearch
#bsear­ch_­index
#clear
#collect
#collect!
#combi­nation
#compact
#compact!
#concat
#cycle
#decon­struct
#delete
#delete_at
#delete_if
#diffe­rence
#dig
#drop
#drop_­while
#fetch
#fill
#find_­index
#flatten
#flatten!
#hash
#index
#initi­ali­ze_copy
#insert
#inspect
#inter­section
#keep_if
#minmax
#pack
#permu­tation
#product
#rassoc
#reject
#reject!
#repea­ted­_co­mbi­nation
#repea­ted­_pe­rmu­tation
#replace
#rever­se_each
#rindex
#rotate
#rotate!
#select
#select!
#shift
#shuffle
#shuffle!
#sum
#take
#take_­while
#transpose
#union
#uniq
#uniq!
#unshift
#values_at
#zip
#count
#size
           
 

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  • Published: 4th October, 2023

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