What does lazy do in Ruby?

Enumerator::Lazy is a special type of Enumerator , that allows constructing chains of operations without evaluating them immediately, and evaluating values on as-needed basis.

Does Ruby do lazy evaluation?

Lazy evaluation in Ruby is a great feature when working with a subset of a big dataset. But, if it really pays of for your use case has to be evaluated every time separately.

What does the lazy method do to enumerators and why is that useful?

Lazy enumerators make it possible to to some very interesting and powerful things with them. Enumerators are at the heart of what makes Ruby such a powerful, dynamic language. And lazy enumerators take this a step further by allowing you to efficiently work with extremely large collections.

What is enumerator in Ruby?

Enumerator, specifically, is a class in Ruby that allows both types of iterations – external and internal. Internal iteration refers to the form of iteration which is controlled by the class in question, while external iteration means that the environment or the client controls the way iteration is performed.

What is autoload in Ruby?

Ruby has an in-built module autoload, which comes into action whenever a specific module or a class is accessed or called upon from the parent or calling class or module. Upon receiving a call, this module registers the corresponding file path to the called module.

What are Ruby fibers?

Fibers are primitives for implementing light weight cooperative concurrency in Ruby. Basically they are a means of creating code blocks that can be paused and resumed, much like threads. The main difference is that they are never preempted and that the scheduling must be done by the programmer and not the VM.

Whats is enumerable?

Enumerable properties are those properties whose internal enumerable flag is set to true, which is the default for properties created via simple assignment or via a property initializer. Properties defined via Object. defineProperty and such default enumerable to false.

What is enumerator method?

enumeration is a method in whichenumerator collects the data in a small area. its merit is- it gives a right information as information is taken by the enumerator himself. Explanation: enumeration is a method in whichenumerator collects the data in a small area.

What is the purpose of load Auto_load and Require_relative in Ruby?

-Auto_load: this initiates the method that is in hat file and allows the interpreter to call the method. -require_relative: allows the loading to take place of the local folders and files.

What are Initializers in rails?

An initializer is any file of ruby code stored under /config/initializers in your application. You can use initializers to hold configuration settings that should be made after all of the frameworks and plugins are loaded.

What is mutex in Ruby?

In Ruby, a mutex not only acts as an atomic lock, but also functions as a memory barrier. When wanting to read the value of a variable being modified by multiple threads, a memory barrier will effectively tell your program to wait until all in-flight memory writes are complete.