What are keywords in Clojure?
Keywords are symbolic identifiers that evaluate to themselves. They provide very fast equality tests… Symbols are identifiers that are normally used to refer to something else. They can be used in program forms to refer to function parameters, let bindings, class names and global vars…
What are symbols in Clojure?
Symbols in any Lisp are used as identifiers. If you’re going to refer to the value of a variable, say, you need to have a way of naming it; that’s what symbols are for.
What means Clojure?
Clojure (/ˈkloʊʒər/, like closure) is a dynamic and functional dialect of the Lisp programming language on the Java platform. Clojure advocates immutability and immutable data structures and encourages programmers to be explicit about managing identity and its states.
Can you not read Lisp?
Lisp is no harder to read than any other language.
How are two keywords equal in Clojure class?
Two keywords are equal given the same conditions. Clojure makes equality testing for keywords particularly quick (a simple pointer comparison). It achieves this by its intern method of the Keyword class guaranteeing that all keywords with the same namespace and name will return the same keyword object.
Which is an example of indexing in Clojure?
Vectors are sequential, indexed, heterogeneous collections. Indexing is 0-based. An example of retrieving the value at index 1 in a vector of three values: { … } – Map Maps are heterogeneous collections specified with alternating keys and values:
When to use # and # in Clojure?
Although some Lisps allow the read table to be extended by users, Clojure does not. The # is also used at the end of a symbol when creating generated symbols inside a syntax quote. # { … } – Set See # for additional details. # {…} defines a set (a collection of unique values), specifically a hash-set. The following are equivalent:
When is Clojure’s true when called with two collections?
Clojure’s = is true when called with two collections, if: Both arguments are sequential (sequences, lists, vectors, queues, or Java collections implementing java.util.List) with = elements in the same order. Both arguments are sets (including Java sets implementing java.util.Set ), with = elements, ignoring order.