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Optional class:
private Optional(T value) { this.value = Objects.requireNonNull(value); } public static Optional of(T value) { return new Optional(value); } public static Optional ofNullable(T value) { return value == null ? empty() : of(value); } public T get() { if (value == null) { throw new NoSuchElementException( No value present ); } return value; } public T orElse(T other) { return value != null ? value : other; } public Optional map(Function ....
How to Write an Equality Method in Java by Martin Odersky, Lex Spoon, and Bill Venners June 1, 2009 equals method that preserves the contract of equals even when subclassses of concrete classes add new fields. In Item 8 of 1, Josh Bloch describes the difficulty of preserving the equals contract when subclassing as a “fundamental problem of equivalence relations in object-oriented languages.” Bloch writes: There is no way to extend an instantiable class and add a value component while preserving the equals contract, unless you are willing to forgo the benefits of object-oriented abstraction. Chapter 28 of Programming in Scala shows an approach that allows subclasses to extend an instantiable class, add a value component, and nevertheless preserve the ....
Techies give an old fashioned Supreme Court decent marks in coding case John Fritze, USA TODAY Replay Video WASHINGTON – Supreme Court justices are among the nation s foremost legal minds. But just how good are the nine members of the court at computer programming? Often teased for their ambivalence toward technology – Chief Justice John Roberts once asked a lawyer in 2010 to explain the difference between an email and a pager – the justices this week were forced to grapple with complicated programming concepts in a multi-billion-dollar copyright dispute between tech giants Google and Oracle. So how did the justices do at trading their black robes in for white hats? Not too bad, said several programmers and tech leaders who were involved in the case. ....
Techies give an old fashioned Supreme Court decent marks in coding case msn.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from msn.com Daily Mail and Mail on Sunday newspapers.
In our world of cutting-edge technologies, there’s something almost magical about the discovery in Russia of a cache of Soviet-era computers from the 1970s. So this week, computer hardware enthusiasts around the web took a moment for a kind of holiday remembrance for the ghost of computers past, responding with their own memories and musings. RusUE.com describes itself as a Russian Urban Exploration site “a weblog about fascinating abandoned sites found on the territory of the former Soviet Union.” “I really like looking through photos taken at various abandoned objects,” explained Roman, the site’s creator, a Russia-based Affination of old facilities, adding “I have visited such places myself a few times. It feels like traveling in time.” Aided by a translator, he’s been collecting Russian-language articles from other sites and arranging for their re-publication in English at RusUE.com. ....