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6 matches found for 'anonymous function'

Scala Anonymous Functions

... even though iB is passed into it. justTrue snatches the Int parameter from iB, and then calls an anonymous function which takes that Int and returns a true. By making use of type: type Set = Int => Boolean We can reduce the definition of justTrue to: def justTrue(iB : Set) : Set = (x : Int) => true Much better! And why does this work? Since we are taking an Int x which comes from iB, we are automatically returning a function.

October 22, 2014

Forall and Exists in Scala

... true. If all elements in the set do not satisfy the predicate, exists returns false. Using anonymous functions, we can define exists as: def exists(s: Set, p: Int => Boolean): Boolean = !forall(s, (x: Int) => !p(x)) Why does this work? There are two steps involved here.

November 4, 2014

Intro to Python Lambda

Lambdas are simply anonymous functions for Python. We often don't want to write a whole new function with a name if the function itself only consists of one line of code. It is tedious, even though it might be less scary to see.

October 22, 2014

Javascript Concepts

... like C++, Java, or Python. Since functions are first-class, callbacks are possible, as well as anonymous functions and closures. Classes There is no such thing as a class statement like in other languages, because Javascript is a prototype-based language.

October 29, 2017

A guide to const in C++

The Many Uses of const with Operator Overloading const can be used in different ways depending on how an operator is overloaded. There are two major cases to consider: If an operator is overloaded as a nonmember function (not part of the class definition) If an operator is overloaded as a member function (part of the class definition) Case 1: Overloaded as a Nonmember Function Here is an example of the + operator overloaded as a nonmember function: const Weight operator +(const Weight& w1, const Weight& w2); Notice we have three positions where we can place const and each one means something different.

January 24, 2015

Java Essentials

JVM Java is a statically typed language that is compiled into bytecode (i.e. with javac) and understood only by the JVM, or Java Virtual Machine. The JVM is an interpreter that reads the Java bytecode and translates them into machine code before execution.

March 29, 2019