Programming FlashCards - Learn Coding Concepts

Ruby Safe Navigation

Prevent NoMethodError by safely calling methods on potentially nil objects using the &. operator, which returns nil instead of raising an exception.

Ruby

Ruby Dup Method

Creates a shallow copy of an object, allowing modifications without affecting the original object's state.

Ruby

Ruby Enumerable Select

Filter collections by returning a new array with elements that match a given condition using a block predicate

Ruby

Ruby Enumerable Lazy

Lazy evaluation in Ruby allows for efficient processing of potentially infinite sequences by deferring computation until results are actually needed.

Ruby

Hash Transform Keys

Modify hash keys by applying a transformation block, allowing easy key renaming or conversion

Ruby

Ruby Compact Method

Removes nil values from an array, returning a new array with only non-nil elements, helping to clean up and filter arrays efficiently.

Ruby

Ruby Singleton Pattern

Ensures a class has only one instance and provides a global point of access to it, implemented using the Singleton module in Ruby's standard library.

Ruby

Ruby Object Freezing

Prevent modification of objects by making them immutable, protecting data integrity and avoiding unintended changes.

Ruby

Ruby Eigenclass

A singleton class unique to a single object, allowing you to define methods specific to that individual object instance.

Ruby

Ruby Prepend Mixin

A module inclusion method that inserts methods at the beginning of the method lookup chain, allowing method prepending and overriding with super

Ruby

Ruby Tap Method

A utility method that allows you to perform operations on an object within a block while returning the original object

Ruby

Ruby Flip-Flop Operator

A rarely used conditional range operator that changes state between two conditions, primarily used in conditional expressions within ranges.

Ruby

Ruby Refinements

A way to locally modify classes without affecting global scope, allowing safe, scoped monkey-patching of existing classes and modules

Ruby

Ruby Keyword Arguments

Keyword arguments allow more flexible and readable method definitions by using named parameters with optional default values.

Ruby

Ruby Yield Keyword

A powerful Ruby method control flow mechanism that allows a method to receive and execute a block of code passed to it, enabling flexible and dynamic method behavior.

Ruby

Ruby Splat Operator

The * (splat) operator allows flexible argument passing, unpacking arrays, and converting between arrays and argument lists in Ruby methods.

Ruby

Ruby Dynamic Methods

Create methods dynamically at runtime using define_method, allowing flexible and programmatic method generation based on runtime conditions.

Ruby

Ruby Method_missing

Explore Ruby's dynamic method_missing feature, which allows capturing and handling calls to undefined methods, enabling powerful metaprogramming techniques.