Software Development Terms Beginning with R
Radix indicates the number of unique digits from zero (0) that you can use to express numbers in a standard positional numeral system.
React Component
Section titled “React Component”React component is a JavaScript function or class that accepts a single argument called props and returns an element (UI).
React Component Testing Tool
Section titled “React Component Testing Tool”A React component testing tool provides helpful APIs for defining a component’s test cases.
React Element
Section titled “React Element”A React element is a JavaScript object that defines the user interface (UI) you want to render (display) on screen.
React Hooks
Section titled “React Hooks”React hooks are functions used in a function component to hook into React’s state, lifecycle methods, and other React features without writing a class component.
React Props
Section titled “React Props”React props are parameters used to pass arguments to components.
React Router
Section titled “React Router”React Router is a popular routing library that tells React the specific component it should render based on the route (file path) a user requested through the URL.
React State
Section titled “React State”React state is a built-in object used to store a component’s values that are likely to change over time.
ReactJS
Section titled “ReactJS”React is a component-based JavaScript library for efficiently building user interfaces (UI).
Recursion
Section titled “Recursion”Recursion is a method by which a problem gets solved through iteration.
In other words, a recursive function is a function that repeatedly invokes itself infinitely (or until something stops it).
Regular Expression
Section titled “Regular Expression”A regular expression (RegExp) is a JavaScript element used to bundle the patterns you wish to find in a specific string of characters such as text, password, and email address.
Relative Length Units
Section titled “Relative Length Units”Relative length units are dynamic units. In other words, the sizes of things expressed in any of the relative length units will always be dependent on another length.
Remote API
Section titled “Remote API”Remote APIs connect a caller to the resources and services of a remote system.
Remote Repository
Section titled “Remote Repository”A remote repository is the duplicated copy of a project’s .git repository hosted elsewhere—on the internet, on a network somewhere else, or in a different location on your computer.
Repeat (RegExp)
Section titled “Repeat (RegExp)”Regular expression’s repeat operator ({...}) specifies that you wish to find a repeated occurrence of the operator’s preceding item.
Repertoire
Section titled “Repertoire”A repertoire (also called character set) is a group of characters collated for a specific purpose.
The purpose for collating characters could be computer related, like coding, or non-computer related, like music.
Here are some examples:
♠♠♥ ♥ ♣ ♣ ♦ ◊is the symbols character set of a playing card suit. It consists of eight individual characters.9817is the repertoire of a numeral value. It consists of four unique characters.
replace() in JavaScript
Section titled “replace() in JavaScript”replace() returns a new version of its calling string after replacing some specified patterns with a given replacement.
Repository
Section titled “Repository”A repository is another name for a folder.
Rest Operator in JavaScript
Section titled “Rest Operator in JavaScript”The rest operator is used to put the rest of some specific user-supplied values into a JavaScript array.
Responsive Web Design (RWD)
Section titled “Responsive Web Design (RWD)”Responsive web design (RWD) means designing web pages to display nicely on the screen sizes you intend to support (mobiles, tablets, and desktops).
Rest Parameter in JavaScript
Section titled “Rest Parameter in JavaScript”A JavaScript rest parameter consists of the rest operator and a regular parameter.
Rest Variable in JavaScript
Section titled “Rest Variable in JavaScript”A JavaScript rest variable consists of the rest operator and a regular variable.
Restartable Iterator
Section titled “Restartable Iterator”A restartable iterator is an object you can use numerous times. An example is the JavaScript array.
Root Directory
Section titled “Root Directory”Root directory refers to the folder containing all other files and sub-folders of a specific project.
In other words, a root repository is a working directory that houses everything concerning a particular project.
return Keyword in JavaScript
Section titled “return Keyword in JavaScript”The return keyword ends its function’s execution and returns the specified expression (or undefined if you provide no expression).
Root-Level Domain
Section titled “Root-Level Domain”The root-level domain ("") is the highest hierarchy level of any domain name system.
Router (Internet)
Section titled “Router (Internet)”A router is a piece of electronic device that routes (directs) the internet to all your devices.
Router (Programming)
Section titled “Router (Programming)”A router is a code logic used to handle a client’s request to a specific file path.
Runtime
Section titled “Runtime”Runtime (also called execution time) is the time during which a program is running.
In other words, runtime is the execution period (or lifecycle phase) of a program—which begins from the time the program is invoked and ends when the program’s invocation is closed.