What is atom in Clojure?
Atoms are a data type in Clojure that provide a way to manage shared, synchronous, independent state. An atom is just like any reference type in any other programming language. The primary use of an atom is to hold Clojure’s immutable datastructures. The value held by an atom is changed with the swap!
What is a Clojure var?
In Clojure, variables are defined by the ‘def’ keyword. In Clojure, a value is bound to a variable. One key thing to note in Clojure is that variables are immutable, which means that in order for the value of the variable to change, it needs to be destroyed and recreated again.
How do I use proto REPL atom?
Option 1. Quick Start
- Install Atom.
- Install Java and Leiningen or Boot or have a project with a Gradle wrapper.
- Go to Atom settings, select “+ Install” and search for “proto-repl”.
- Install the Atom Ink package.
- Go to the Proto REPL Settings (Atom Preferences, then packages, then Proto REPL)
What is a vector in Clojure?
A Vector is a collection of values indexed by contiguous integers. A vector is created by using the vector method in Clojure.
Do statements Clojure?
The ‘if-do’ expression in Clojure is used to allow multiple expressions to be executed for each branch of the ‘if’ statement. We have seen in the classic ‘if’ statement in Clojure that you can just have two statements, one which is executed for the true part and the other which is for the false part.
Who maintains Clojure?
Rich Hickey
Like other Lisp dialects, Clojure treats code as data and has a Lisp macro system. The current development process is community-driven, overseen by Rich Hickey as its benevolent dictator for life (BDFL).
What is Colon in Clojure?
The double colon is there to fully qualify keywords with your current namespace. This is intended to avoid name clashes for keywords which are meaningful for different libraries. Without fully qualified keywords you might accidentally overwrite some values in a map and break compatibility with a library.
What is let in Clojure?
;; let is a Clojure special form, a fundamental building block of the language. ;; ;; In addition to parameters passed to functions, let provides a way to create ;; lexical bindings of data structures to symbols.
What does nil mean Clojure?
null value
In Clojure, nil is simply Java’s null value, end of story.” Since Clojure compiles to java bytecode, it sounds like any reference to nil is just a null object reference in the underlying JVM.
What does cons do in Clojure?
Note that Cons objects in Clojure are different from cons cells in other Lisps — in most Lisps, a “cons” is just an object which holds 2 pointers to other arbitrary objects. So you can use cons cells to build trees, and so on. A Clojure Cons takes an arbitrary Object as head, and an ISeq as tail.
What is the purpose of an atom in Clojure?
Clojure – Atoms. Atoms are a data type in Clojure that provide a way to manage shared, synchronous, independent state. An atom is just like any reference type in any other programming language. The primary use of an atom is to hold Clojure’s immutable datastructures.
Where do I find atom settings on Windows?
You can bring up your Atom settings by pressing Command + , (command + comma) or Control + , (control + comma) on Windows. From there, you can go to the “Install” tab and search for the name of the package you’d like to install.
Where do I find Proto REPL in ClojureScript?
You can do this by pressing Command + Shift + P (or Control + Shift + P on Windows) to bring up the Command Palette, then using the Command Palette to search for the Proto REPL: Toggle command. After starting Proto REPL, you should see the message, “Starting REPL with lein in [path to your project]” at the bottom of the REPL instructions.
Where do you place closing delimiters in ClojureScript?
Unlike Java and Javascript, the convention in ClojureScript is to place closing delimiters on the same line instead of on a new line. To help manage this, Shaun LeBron’s Parinfer can automatically balance your closing delimiters based on your code’s indentation.