Sometimes, you want to know if an array contains one or more elements based on a test function.[1,2,3,4].any? { |n| n > 2 } # => trueIf you need to get the first object that matches your criteria, you can use find.[
coll).each do |item| # good (0...coll).each do |item|NewlinesAdd a new line after if conditions spanning multiple lines to help differentiate between the conditions and the body. [link] if @reservation_alteration.checkin == @reservation.start_date && @reservation_alteration.checkout == ...
chomp.to_i puts "Enter the end index you want to put element in:" endi = gets.chomp.to_i if(endi<array_instance.count && start>0) for i in start..endi puts "Enter the element:" array_instance[i] = gets.chomp end else puts "Index out of bound" end # printing the array puts...
Avoid long chains of&.. The longer the chain is, the harder it becomes to track what on it could be returning anil. Replace with.and an explicit check. E.g. if users are guaranteed to have an address and addresses are guaranteed to have a zip code: # baduser&.address&.zip&.upcase...
delete_if drop_while reverse_each Boolean Enumerable methods all? any? one? none? empty? Methods for combining & + - union difference product How to check if a value exists in an Array (include?) How to get array size How to clear an Array How to get the first element of an Arra...
puts("array test: ") temp = [1,2,3,5] print(temp);puts(); for i in 1...5 if temp.include?(i) printf("temp include %d\n", i) else #printf("temp has no member of %d\n", i) puts("temp has no member of #{i}") ...
array_name = Array.new(size = 0, obj = nil) Parameters Arguments play a very important role in this method. This method will take two arguments, the first one is the size and the second one is the element. If you don't provide any arguments, it will result in an empty Array with...
ruby_1_8 ruby_1_9_1 ruby_1_8_6 mvm win32-unicode-test ricsin rexml_adds_tests ruby_1_8_5 matzruby half-baked-1.9 KEIJU KOSAKO RUBY SER SHIGEO v2_1_0_preview1 v1_8_7_374 v1_8_7_373 v1_9_3_448 v2_0_0_247 v1_9_3_429 v1_9_3_426 v2_0_0_195 v2_0_0_0 v1...
Queue.new# Create a thread-safe list of gems to downloadsorted_requests.eachdo|req|# 存储下载实例download_queue<<reqend# Create N threads in a pool, have them download all the gemsthreads=Array.new(Gem.configuration.concurrent_downloads)do# When a thread pops this item, it knows to stop...
users.unshift "robert" # Adds an element in front of the array users.shift # Removes the first element of the array and returns it Does this array contain or include a certain item? Check if a value exists in an array in Ruby: