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Learning TypeScript 2.x - Second Edition
book

Learning TypeScript 2.x - Second Edition

by Remo H. Jansen
April 2018
Beginner content levelBeginner
536 pages
13h 21m
English
Packt Publishing
Content preview from Learning TypeScript 2.x - Second Edition

Pointfree style

Tacit programming, also known as pointfree style, is a programming style in which function declarations do not declare the arguments (or points) on which they operate.

The following code snippet declares a few functions that are used to determine whether a person is eligible to vote in elections:

interface Person { age: number; birthCountry: string; naturalizationDate: Date; } const OUR_COUNTRY = "Ireland"; const wasBornInCountry = (person: Person) => person.birthCountry === OUR_COUNTRY; const wasNaturalized = (person: Person) => Boolean(person.naturalizationDate); const isOver18 = (person: Person) => person.age >= 18; const isCitizen = (person: Person) => wasBornInCountry(person) || wasNaturalized(person); const isEligibleToVote ...
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Publisher Resources

ISBN: 9781788391474Supplemental Content