class Person < ActiveRecord::Base # bad attr_reader(:name, :age) # good attr_reader :name, :age # bad validates(:name, { presence: true, length: { within: 1..10 } }) # good validates :name, presence: true, length: { within: 1..10 } end Space in Method Calls Do not put a...
If you have some non-standard setup and still want nicely labeled test suites, you have to give Simplecov a cue as to what the name of the currently running test suite is. You can do so by specifyingSimpleCov.command_namein one test file that is part of your specific suite. ...
Lever console is something that is not implemented in the runtime. It's an application present in app/main.lc. Here you have a shortened version of that program: import base, compiler console = :module("console", base) dir = getcwd() name = "console" %"import" = Import(dir, Module...
defwelcome(name) puts"howdy #{name}"# 必须包含在双引号内, #{ } 用来包含变量 end welcome("nana")# traditional parens This Produces: howdy nana Parentheses are optional(括号可省略) 1 2 3 defwelcome(name) puts"howdy #{name}"# inside double quotes, #{ } will evaluate the variable endwel...
You'll find lots of "smackdowns" on the .NET between different languages. This post isn't a smackdown post. Sure, if your language of choice doesn't have a particular function, it could likely be added. There are some funone-liner comparisonsthough and some folks think that payin...
Again, we update therequirestatement indsl-loader.rbto load themydsl4.rbfile and run the loader: % ruby dsl-loader.rb params.dsl #<MyDSL:0x25edc @parameter=0.55, @name="fred"> ["@parameter", "@name"] This is all well and good, but what if we don’t know the parameter names ...
In Ruby, variables are dynamically typed, meaning that you don't need to explicitly declare their type. The name of a variable starts with a lowercase letter or underscore (_). Ruby provides several data types, including integers, floats, strings, booleans, arrays, and hashes. These data ...
A Ruby class is defined simply byclassfollowed by the class name, written in CamelCase. Follow this byendand you have created a new class: class Animals end Creating Class Objects Objects can be thought of as members or instances of the class. For example, we could create new objects/inst...
Redis Store - Namespaced Rack::Session, Rack::Cache, I18n and cache Redis stores for Ruby web frameworks. Redis Objects - Map Redis types directly to Ruby objects. Works with any class or ORM. Ohm - Ohm is a library that allows to store an object in Redis, a persistent key-value dat...
In Ruby, an object’s grandparent class is known as its “superclass.” In other words, if you have an object that is a string — meaning that your object inherits the properties of theStringclass — then the parent class ofStringisString’s superclass. Be careful not to miss an impor...