You can swap the values in variables without the use of a temp variable. Remember your first programming class: Swap the values in "i" and "j"? You had to use a "t" variable to store one of the values first. Not needed in Ruby. 1 2 3 4 5 i =0 j =1 puts"i = #{i}, j...
Registers are allocated for stack operations of the virtual machine. More calls with optional arguments are compiled. Exception handlers are also compiled. Instance variables no longer exit to the interpreter with megamorphic Object Shapes. Unsupported call types no longer exit to the interpreter. Inte...
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...
Dependent Types Higher-order Types Class/Singleton Method Types Structural Types Singleton Types Self Type Type Aliases Generic Class Types Tuple Types Finite Hash Types Type Casts Bottom Type (%bot) Non-null Type Constructor Type Static Type Checking Types for Variables Tuples, Finite Hashes, and...
RBS is a language to describe the types of Ruby programs. Type checkers including TypeProf and other tools supporting RBS will understand Ruby programs much better with RBS definitions. You can write down the definition of classes and modules: methods defined in the class, instance variables and...
Rails doesn't currently support the binding of variables in SQL queries with Oracle, which impacts performance negatively. The current version of Rails (1.2) sets Oracle connections option cursor_sharing to similar, which results in significant performance improvements, by automatically turning all liter...
Ruby LSP is able to usesemantic syntax highlightingand styling due to its rich understanding of a project source code. For example, it can highlight: Method invocations consistently, without confusing it with local variables. Local arguments (such as method, block or lambda arguments) consistently...
Enter a value in Description and select one of the options for Expires and choose Add. Copy the client secret value before you leave this page. You will need it in the next step. Configure the sample Rename the ./graph-sample/config/oauth_environment_variables.rb.example file to oauth_...
# Variables # 变量 x = 25 #=> 25 x #=> 25 # Note that assignment returns the value assigned # This means you can do multiple assignment: # 请注意,赋值语句会返回被赋进变量的那个值, # 这意味着你可以进行多重赋值: x = y = 10 #=> 10 ...
Most frequent situation is the use of // # comments. We bypass ANSI C mode for them. Otherwise # extension libs cannot include those headers. # Since math.h in some mingw64 wrongly declares frexp and modf # to be pure, the variables pointed by the second arguments are # ...