arrays can contain any datatype, including numbers, strings, and other Ruby objects. The output is: 8 => nil Notice now it prints out the incremented value as expected, but the return value is now nil. and therefore Ruby assumes z is a method rather than variable, does nothing, and therefore z.nil? default = 0. Return nil. But for a, it will work correctly. Also called associative arrays, they are similar to Arrays, but where an Array uses integers as its index, a Hash allows you to use any object type.. Hashes enumerate their values in the order that the corresponding keys were inserted. will only return true if the object itself is nil. In my opinion it is worth talking over, considering. puts and print are methods that return nil: result = puts "hello" #=> hello result == nil #=> true Since the Ruby Console always shows the value of … Thanks! Example Remember also that a Ruby method returns nil by default. Who decides how a historic piece is adjusted (if at all) for modern instruments? Accessing a value in a Hash requires using its key: We can rewrite the previous example using the safe navigation operator: Well, nil is also its own class. Provided by Ruby 2. Syntax: str.empty? And since code not matching comment is a bug, there's a bug straight away? non_existing_method if @person. can tell the difference between a nil value & a variable that has never been set before; These special attributes make this keyword worth learning about. A Hash is a dictionary-like collection of unique keys and their values. They each have return values of nil. If you nest blocks returnis still jumping out of the method (and not out of the first block o… Instead you can make a simple method call: Yep, file-internal helpers don't need to go in the header. This is sometimes known as tell don't ask. When the Ruby interpreter boots up, it initializes FalseClass, TrueClass and NilClass. Rails 4. method: if @bacon.nil? For example, given this definition: But if you're only expecting char to be a or b it will work. Also note that in Ruby we do not have to use the statement return, as in other languages. the last time I used java it was early ant days, so I don't know maven at all. Applying suggestions on deleted lines is not supported. Have a question about this project? Mean what you write. Even if many_items is nil @obj.items_per_page remains at 20. The return statement in ruby is used to return one or more values from a Ruby Method. method. You signed in with another tab or window. An optional failure message may be provided as the final argument. An empty method returns nil. new (0) Or by using the default= method: grades = {"Timmy Doe" = > 8} grades. It indicates a value that is not present. The correct way to do this would be: Ruby has other ways to check if a variable has been defined or not. Because of its low operator precedence. We must check for nil in many locations in our code. To learn more, see our tips on writing great answers. That sounds like whatever class @obj is has a custom modifier method items_per_page= that only updates the value if the new value is not nil.This is not standard Ruby. Example. A simple truthiness test could introduce logic errors. Empty. Everything else returns false, which makes this method the perfect way to test for nil, that stays true to the object-oriented values of the Ruby language. The bigger picture here is that doing nil checks like this is also a bit of a code smell. Ruby has a variety of ways to control execution that is pretty common to other modern languages. And I see why -- it actually exposed a lower-level bug in the JRuby implementation. That means that an empty string is NOT nil and an empty array is NOT nil. see the test at https://github.com/google/protobuf/pull/332/files#diff-bbb59c88129c0bf6537d0487634b282dR764 If this is run on the master branch, it fails, Thanks for finding these issues with the JRuby implementation! Also, in order to return a bunch of things at once we could return an Array that holds the things that we are interested in, but the Array itself is just one object. Codecademy is the easiest way to learn how to code. For now I think it's fine (best to do one thing at a time in a PR), but feel free to send a separate cleanup PR that splits basic.rb into categories of tests if you feel strongly about it. Ruby's return without a value will always return nil, so adding characters is just needless clutter. ruby returns nil if an array index is out of bounds also allows negative indicies (again, to make it act more like a ruby lib) ... ruby: return nil for out of bounds #332. ruby returns nil if an array index is out of bounds also allows negative indicies (again, to make it act more like a ruby lib) Only call method if not nil: if array[5] && array[5].size # do something... end This is why Ruby 2.3 introduced the “safe navigator” operator (&.). This method is one of the examples of non-destructive methods where the changes made by these methods are permanent. Adds a top level demand() method, which replaces long lines of repetitive code to check for nil?/present?/empty?, etc., hard-to-read ternary operators (? This class is not instantiable. this test wasn't working; the msgs being added in m.repeated_msg.push were not persisting in the object; IE, if you looked at them after the setter, they would m.repeated_msg == []. It's interactive, fun, and you can do it with your friends. They are one line methods, so the last line is the only line, and the last line of a method in Ruby returns without you telling it to return (this is called an “implicit return”). Even if many_items is nil @obj.items_per_page remains at 20. Is it kidnapping if I steal a car that happens to have a baby in it? The return keyword returns nil if no value is passed as argument. Executes code if the conditional is true. I'm new to Ruby and I was surprised when I found out that all objects are true apart from nil and false. return nil if array index indicie is out of bounds skippy May 1, 2015. Notice Ruby uses elsif, not else if nor elif. I can't see any reason why the rules for their use would be … So we can avoid typing the "return" keyword. The “nil?” method only returns true for the nil object. ~ :) ruby extest.rb Enter a number>> No way extest.rb:3: undefined method `[]' for nil:NilClass (NoMethodError) If a user does not enter a number, the match method in line 3 will return nil, which causes the program to crash out. And it's enough to say if @objectname to test whether it's not nil. Does doing an ordinary day-to-day job account for good karma? ruby returns nil if an array index is out of bounds also allows negative indicies (again, to make it act more like a ruby lib) Is “pass objects instead of required variables only” contradict with “avoid global variables”? Even 0 is true. returns nil, the chain is halted and nil is returned. site design / logo © 2021 Stack Exchange Inc; user contributions licensed under cc by-sa. Developer insists if statements shouldn't have negated conditions, and should always have an else block. I’m definitely a fan, but I ran into some behavior that surprised me the other day and wanted to share what I found. For example, nil can… All the expressions described here return a value. In the second instance, since the first reference to z is z.nil? Ruby's return without a value will always return nil, so adding characters is just needless clutter.. Also, next and break have similar semantics. In Ruby, true and false are boolean values that represent yes and no. I … # Ruby code # if my_object.nil? An implicit return value is one that is not specified. Content is mostly focused on (but not limited to) Ruby, Rails, Web-development and refactoring big, complex Rails applications. method which Ruby 2.3.0 added a safe navigation operator (&.) # ... end … Basically if the variable is nil, I do something (or not). Also, to file a NIL GSTR 9, the registered tax person is required to file NIL monthly returns for all the months in the given fiscal year. What if a taxpayer fails to file his NIL Return? Are you testing for nil? Then because conditional statements treat nil as false we can write: The if (object) pattern is very common in Ruby code. Checking for .nil? Ruby program that shows nil field class Box def size @value end end # Create a new class instance. Not every object which iterates and returns values knows if if it has any value to return 1. new (0) Or by using the default= method: grades = {"Timmy Doe" = > 8} grades. It has no statements, so the evaluation result of the last statement cannot be returned. This will return the first element of responses, or nil. Tests fail (I assume you are saying just under Java/JRuby), really? Thanks! true is an object of TrueClass and false is an object of FalseClass. We can protect against … Return is only valid inside a method. Every method always returns exactly one object. If an index number is not found, such as for a value that does not exist, the console will return nil. empty? (Poltergeist in the Breadboard), Mobile friendly way for explanation why button is disabled. Nil GSTR 9 Return can be filed on GSTN Portal. Coding style issue: Should we have functions which take a parameter, modify it, and then RETURN that parameter? It is more readable, in my subject opinion, even if it is less compact. you're right; jgem is no longer needed. OK, this looks good; I'll go ahead and merge. Not only is if variable.nil? Now you can argue that returning nil is not always the best idea, since it means checking for nil everywhere. In the first form, if no arguments are sent, the new array will be empty. The method returns true if the block never returns false or nil.If the block is not given, Ruby adds an implicit block of { |obj| obj } which will cause all? If the conditional is not true, code specified in the else clause is executed. The result is: > false.object_id => 0 > true.object_id => 2 > nil.object_id => 4 What happened to 1 and 3? Hashes have a default value that is returned when accessing keys that do not exist in the hash. It only takes a minute to sign up. Should also update the indexSet method, true? (:non_existing_method) # => nil. Asking for help, clarification, or responding to other answers. try_convert (obj) → array or nil click to toggle source Tries to convert obj into an array, using the to_ary method. This will return the first element of responses, or nil. Idiomatically, unless variable is preferable to if !variable. If instead a pattern is supplied, the method returns whether pattern === element for every collection member. rev 2021.1.21.38376, The best answers are voted up and rise to the top, Software Engineering Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. For the tests in these control expressions : nil and false are false-values Here, we have explained if Expression, Ternary if, unless Expression, Modifier if and unless and case Expression . Syntax return [expr[`,' expr...]] If more than two expressions are given, the array containing these values will be the return value. Ruby program that has method, returns nil def analyze(n) # This method returns nil unless n equals 2. if n == 2 return n * 2 end end puts "Result is nil" if analyze(3) == nil rubyonrailsdevelopment - June 28, 2017 0 thanks As everything in Ruby is object, the nil value refers to the non-instantiable NilClass class. Nil is everywhere: without nothing, there cannot be something. Software Engineering Stack Exchange is a question and answer site for professionals, academics, and students working within the systems development life cycle. Add this suggestion to a batch that can be applied as a single commit. Note: Ruby does not contain Boolean class. But that is another kettle of fish. Given that testing for object "presence or absence" is such a frequent requirement, the truthiness of objects is a useful aspect of Ruby, albeit surprising for newcomers to the language. Let's take it step by step and just run add_three(5). Hashes have a default value that is returned when accessing keys that do not exist in the hash. Ruby on Rails ActiveRecord where property is not blank (4) I am trying to find records where a specified property is not empty or blank. Example 1: If you attempt to access a hash with a key that does not exist, the method will return nil. Should have been "do stuff when variable is nil or false"? I also agree that my version of nil conditional is too permissive and shouldn't return nil if variable does not exist. What they print to the console is NOT their return value. Commits. A nice thing about that property of the language is that you can write: My colleagues, who are more seasoned Ruby developers, insist I should choose that instead of using .nil? if x.size == nil puts “NIL” end Output NIL. like so: However I believe that the latter is a better option for two reasons: Only one suggestion per line can be applied in a batch. try (:non _existing_method) # => nil. Also, next and break have similar semantics. Would having only 3 fingers/toes on their hands/feet effect a humanoid species negatively? In Ruby, a method always return exactly one single thing (an object). We have a list of places to update the version in our internal step-by-step release checklist. throws and exception. Suggestions cannot be applied while the pull request is closed. Returns nil on out-of-bounds, #make sure we set the RepeatedField and can add to it. Since it is a string it is not nil in the database. nil ? Executes code if the conditional is true. print sharks.index("Whale") Output. If you do something like this: The result is “expression”. The problem with empty? Here you can learn more about enumerators 1. Agree, I pointed that out as another reason to prefer .nil? Suggestions cannot be applied on multi-line comments. privacy statement. default = 0. How can ATC distinguish planes that are stacked up in a holding pattern from each other? If you are testing for nil, why do you want the test for false to also enter that block? is a String class method in Ruby which is used to check whether the string length is zero or not. When a size and an optional default are sent, an array is created with size copies of default.Take notice that all elements will reference the same object default. http://devblog.avdi.org/2011/05/30/null-objects-and-falsiness/, Episode 306: Gaming PCs to heat your home, oceans to cool your data centers. .blank? Returns true when they have no elements. An if expression's conditional is separated from code by the reserved word then, a newline, or a semicolon. As you always knew, and in blocks too: returnexits that method NOW. So the initial comment in the original question was wrong? 1. but it is not included in Enumerable. Everything You Need to Know About Nil, Well, nil is a special Ruby object used to represent an “empty” or “default” value. For example, given this definition: Well, the first bit is reserved for Fixnum values (numbers) only. Negated if statements are often considered a code smell as it's easier to miss the negation when skimming. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. Only methods such as += worked because of the =, which called setField, which in turn called addRepeatedField. This keyword can be useful, but it has some problems. :) and chunky if statements. and therefore Ruby assumes z is a method rather than variable, does nothing, and therefore z.nil? Return values. This means that, by default, all the object are not nil. But that is another kettle of fish. In 99% of the cases, if a local variableis missing you have a typo or someone forgot to declare that varia… Probably good to add a static though (this keeps the symbol internal to the file, like an anonymous namespace in C++). do x" and preferable when you know that variable is not boolean. Throws an exception on out-of-bounds, * Accesses the element at the given index. Example:. Thanks for contributing an answer to Software Engineering Stack Exchange! Cf active_support_core_extensions.html#try. But that is another kettle of fish. Calling a method on a not existing object? Example: if arr[5]&.size # do something... end Another way to test for nil is to use the nil? See the added tests, which will fail incorrectly if run on the master branch. 1 <=> 2 # -1 2 <=> 2 # 0 2 <=> 1 # 1 Ruby’s sort method accepts a block that must return -1, 0, … The values false and nil are false, and everything else are true. If the value can’t be converted to an Integer, Integer will raise an exception, which you can catch and assign nil to the value. nil is returned if there is no change, not only if the hash is empty: hash = { foo: :bar, one: :two } # => {:foo=>:bar, :one=>:two} hash.compact! Notice Ruby uses elsif, not else if nor elif. NoMethodError: undefined method `times' for nil:NilClass Looks like somewhere along the line, we got a nil and nils do not know how to respond to a times method call. It still throws exceptions if a values is not nil and method does not exist, which is just like it should. If the conditional is not true, code specified in the else clause is executed. That sounds like whatever class @obj is has a custom modifier method items_per_page= that only updates the value if the new value is not nil.This is not standard Ruby. [RUBY] . this was not working in master; see comment in RubyMessage. Why are two 555 timers in separate sub-circuits cross-talking? One of the things I love about Ruby is nil. nil . that checks for nil before calling a method. Methods often return nil when they attempt to locate an element that does not exist. or a false value? How should I refer to a professor as a undergrad TA? It accomplishes the same thing - it either returns the address or nil if some value along the chain is nil.The first example may also return false if, for example, the owner is set to false.. However, if you are testing for nil by testing for nil || false, this isn't what you mean. Yes, probably good to pull this out to a private method helper. ActiveRecord’s where.not is a great tool that can make complex queries easier to read. Checking if a variable is not nil and not zero in ruby, nil and NilClass, check out this sweet Ruby Guides article! All the expressions described here return a value. Checks. the test file is getting long; I can keep going in this style, but I can also start pulling them out into separate test files... your call (if I pull out into separate test files, that should probably be its own PR). is one of the few things in Ruby that ends in a question mark, but doesn’t follow the usual convention to return either true or false; defined? Ruby program that uses empty method, nil Simple and consistent. So had we done this with our add method above: def add (x, y) puts x + y end z = add (2, 1) 3 => nil z == 3 => false z == nil => true. It was a contribution and I had thought I reviewed it carefully but it seems a few things slipped through :-). I'll remove (running gem was hanging, but there was a stuck thread; I reran and it worked fine). This example shows how nil is used with the Array class. So, nil is an object, too. Already on GitHub? This means that methods like << and push were creating a new repeatedField, but it wasn't being saved to the parent object. http://devblog.avdi.org/2011/05/30/null-objects-and-falsiness/, Tell objects what to do, don't ask them what they are. We’ll occasionally send you account related emails. The object returned could be the object nil, meaning “nothing”, but it still is an object. The syntax is the same as send. else my_object.display_info() end Wait a second… What we’ve actually done to check if object is nil, was to call the nil? For local variables: For instance variables: But you don’t want to use any of that. assert_not_nil( expression, failure_message = nil ) click to toggle source Tests if expression is not nil. Demand (Ruby Gem) Return a variable if it's present (and optionally of the right type), otherwise, a default or nil. respond_to? If no expression given, nil will be the return value. Whenever a method doesn’t return a useful value, it returns nil. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I was super-skeptical, because we check these things before cutting releases, and we haven't changed JRuby since. static VALUE rb_false(VALUE obj) {return Qfalse;} The rb_false function returns Qfalse — which is the C-level value for Ruby false. If you use it inside a block or not is not relevant. There is no destructive version of this method. Dynamic typing function arguments - how to keep readability high? Sign in Because their is a lot of hand-rolled functionality rather than using the ruby stdlib or core (for performance and strong typing), I think tests which are usually not done (like testing push) need to be done. Is there a better term for “functional method chaining”? In the previous section, we’ve covered the “nil” construct in Ruby. NilClass is a built-in class provided by Ruby. to your account, ruby returns nil if an array index is out of bounds, also allows negative indicies (again, to make it act more like a ruby lib). Since nil in Ruby is just an object like virtually anything else, this means that handling it is not a special case. Return lets you jump out of a method and returns nilor an argument. You must change the existing code in this line in order to create a valid suggestion. is there a way to automate this? throws and exception. Agreed it would be nice to automate but right now seems like it might be more scripting/file autogeneration mess than it's worth... this is functional but smells... if you agree, I can pull it out into a helper, like in the C file. Then take the value and put it in the array, but only if it’s not nil. Provided by Ruby; Can an be used on anything; Will return it's nil in Ruby, not null. 2. This operator compares two Ruby objects and returns -1 if the object on the left is smaller, 0 if the objects are the same, and 1 if the object on the left is bigger. I can't see any reason why the rules for their use would be any different. Also, in order to return a bunch of things at once we could return an Array that … If an index number is not found, such as for a value that does not exist, the console will return nil. Returns a new array. Ruby on Rails latest stable (v5.2.3) - 9 notes ... try will also return nil if the receiver does not respond to the method: @person. For the tests in these control expressions : nil and false are false-values; true and any other object are true-values ; Ruby: if Expression. is a rails method and solves the issue of the ugly error you get when checking if something nil is empty. But they insisted that "if variable do x" is more idiomatic than "if variable.nil? Second try(:[], :category) will try looking hash[:category] and will return nil if value not found or if tried on nil value; Last try(:downcase) will try calling downcase method on the object and returns nil if the calling object is nil otherwise result; Why to use try instead of rescue - IIRC, I had managed to just gem install bundler while in an environment that had selected JRuby via rvm, but it's been a while. If no default is set nil is used. Returns: It returns true if str has a length of zero, otherwise false. Then install the required Ruby gems (JRuby): * Accesses the element at the given index. Engineering Stack Exchange is a method ; defined? say if @ objectname to whether... If run on the master branch “ avoid global variables ” exactly single... Such as for a free GitHub account to open an issue and contact its maintainers and community. The collection members are false, this means that, by default nil.... The test for false to also enter that block successfully merging this pull request may these... Method returns whether pattern === element for every collection member add ssh keys a. Readability high to the method: grades = Hash I think it 's enough to say if @ objectname test. That out as another reason to use any of the collection members are,! True is an object like virtually anything else, this means that handling it is less compact that! Provided by Ruby ; can an be used to return true when none of the examples of non-destructive methods the. The string length is zero or not word then, a newline, or a semicolon NilClass class OO aim... Ruby check if nil before calling method ( 6 ) ActiveSupport comes with a,... Be converted one or more values from a Ruby method statements immediately before leaving office as another to. Their use would be: Ruby has other ways to check whether the string length is zero or not &... Taxpayer fails to file his nil return Breadboard ), Mobile friendly way for explanation why is... The next few weeks nil this is consistent with many other bang methods, considering safe! Picture here is that doing nil checks like this is n't what mean... Existing code in this line in order to create a valid suggestion a rails method and nilor. This sweet Ruby Guides article hanging, but it seems a few examples of non-destructive methods the. Apart from nil and not zero in Ruby, nil if an_object nil... Length of zero, otherwise false yes, probably good to add ssh keys to a specific user linux. Developer insists if statements are often considered a code smell add_three ( 5 ) to:new. For distinguishable particles in Quantum Mechanics logo © 2021 Stack Exchange and put it in the JRuby implementation in... Make complex queries easier to read does not exist, which in turn called addRepeatedField method:.. Explained if expression, Modifier if and unless and case expression reason why the rules for their would.: nil stacked up in a batch can argue that returning nil is not a method rather than variable does... * Accesses the element at the given index young Adult Fantasy about children living with an elderly woman learning... To toggle source tests if expression 's conditional is separated from code by the word. === element for every collection member return, as in other languages uses empty method, nil and does... Before calling method ( 6 ) ActiveSupport comes with a nil value refers to the method grades! Default value by sending it as an argument, unless expression, failure_message = nil ) to! The Breadboard ), really or responding to other answers object returned could the... Use return with a nil value refers to the console is not.... In RubyMessage nil before calling method ( 6 ) ActiveSupport comes with a method doesn ’ t want to any! You have good reason to use any of that privacy statement 's not nil its and! One that is returned when accessing keys that do not exist, the nil.... Within the systems development life cycle of a code smell Inc ; user contributions licensed cc. Better term for “ functional method chaining ” order to create hashes to! This was not working in master ; see comment in RubyMessage stuff when variable is nil so. Solves the issue of the collection members are false, this is consistent with many other bang.. Unless and case expression changes were made to the console will return nil prefer... Then install the required Ruby gems ( JRuby ): * Accesses the element the. Codecademy is the given string which is used with the array class but will proceed.... Immediately before leaving office for every rubyist result of the last time I used java it early! Call: it returns nil when called on nil regardless of whether it to... The code that conveys exactly what you mean! variable function arguments - how to readability. Expression, failure_message = nil ) click to toggle source tests if expression, if. We have explained if expression 's conditional is not nil and method does not exist, the is. Of zero, otherwise false the reserved word then, a newline, or a semicolon must! The easiest way to learn more, see our tips on writing answers... Added tests, which called setField, which called setField, which setField! Site for professionals, academics, and therefore z.nil: it indicates a value from.... Their use would be useful for every collection member the header contact its and. To locate an element that does not exist in the next few weeks are true in... Is specified is to be checked and students working within the systems development life cycle 's more object,! ; user contributions licensed under cc by-sa required variables only ” contradict “...: should we have functions which take a parameter, modify it, and therefore Ruby assumes z is keyword! Like it should Fantasy about children living with an elderly woman and learning magic related ruby return if not nil., and everything else are true apart from nil and NilClass, check out this Ruby... N'T have negated conditions, and should always have an else block working within systems... This looks good ; I reran and it 's enough to say @... Out-Of-Bounds, * Accesses the element at the given index method: nil else... Just run add_three ( 5 ) click to toggle source tests if expression 's is. Why button is disabled nil instead of Lord Halifax here is that doing nil checks like this: the (. = nil ) click to toggle source tests if expression, Ternary if, unless is..., its obvious that these do not have to use any of that it... Is there a better term for “ functional method chaining ” C++ ) is supplied, the nil! Steal a car that happens to have a default value nil @ obj.items_per_page remains 20! Obvious that these do not exist, the console will return nil, meaning “ ”..., every taxpayer is required to file his nil return we can rewrite previous... Call: it returns nil on out-of-bounds, # make sure we set the RepeatedField and can add it. Code specified in the Breadboard ), really I found out that all objects are.. > nil product states for distinguishable particles in Quantum Mechanics found, returns a default value by it... Are permanent step-by-step release checklist jump out of bounds skippy may 1, 2015 opinion, in... Changed JRuby since account for good karma when I found out that objects! Ve already said, in Ruby is nil, meaning “ nothing ”, but seems... The key is not true, code specified in the second instance, the! Of string as a undergrad TA instance, since the first reference z! Is the given string which is used with the array class any reason why the rules for their would... Negated conditions, and it 's not nil and NilClass, check out this sweet Ruby Guides article nil! Write the code another reason to prefer.nil file his/her GSTR 9, even many_items... In this line in order to create hashes has some problems and their.... None of the ugly error you get when checking if something nil is everywhere: nothing! Feed, copy and paste this URL into your RSS reader comment in ruby return if not nil! User in linux methods where the return value is specified if! variable as the argument to?... The bigger picture here is that doing nil checks like this: the if ( object pattern. To::new: grades = { `` Timmy Doe '' = > 8 grades! That the latter is a dictionary-like collection of unique keys and their values every collection member keyword returns nil called... Variables only ” contradict with “ avoid global variables ” don ’ t want to use the return... In my opinion it is worth talking over, considering ; can be... Non _existing_method ) # = > 8 } grades in many locations in our code that uses empty,... Method, nil and NilClass, check out this sweet Ruby Guides article I hear gates... Is an object ) by these methods are permanent user in linux test whether it responds to the.... This RSS feed, copy and paste this URL into your RSS reader of not checking if have... Be the return statement in Ruby and put it in the second instance, the! So: However I believe that the latter is a method can only return or. For local variables: for instance variables: but you don ’ t to... The `` return '' keyword operator would be useful, but it seems a examples. Value, it returns nil do x '' is more idiomatic than `` if variable do x '' preferable. Paste this URL into your RSS reader ; jgem is no longer needed why -- it exposed.

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