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But many programs interact with things outside of the processor. For example, they may communicate over a computer network or request data from the hard disk—which is a lot slower than getting it from memory. ... In part, this is handled by your operating system, which will switch the processor between multiple running programs. But that doesn’t help when we want a single program to be able to m..

https://stackoverflow.com/questions/37491626/where-does-a-javascript-closure-live Where does a JavaScript closure live? I wrote this code to teach myself about JavaScript closures: function1 = function(){ var variable = "foo" var function2 = function(argument){ console.log(variable + argument); } return stackoverflow.com https://stackoverflow.com/questions/111102/how-do-javascript-closures-work ..

Word Boundary \b JS 정규표현식에서 \b는 word boundary이며, 이름 그대로 word character(\w)의 경계를 말합니다. 즉, 문자열에서 어느 한쪽은 word character([_a-zA-Z0-9])이고 다른 쪽은 non-word character([^_a-zA-Z0-9])인 지점들은 모두 word boundary로 볼 수 있습니다. 또한, word character와 문자열의 시작(^) 또는 끝($)의 사이 역시 word boundary로 볼 수 있습니다. 주의할 점은 \b는 어떤 지점을 의미하므로 특정 문자와 매칭되는 것이 아니라는 겁니다. Non-word Boundary \B \B는 non-word boundary입니다. \B는 non-word character의 ..

A typical real program grows organically. New pieces of functionality are added as new needs come up. Structuring—and preserving structure—is additional work. It’s work that will pay off only in the future, the next time someone works on the program. So it is tempting to neglect it and allow the parts of the program to become deeply entangled. This causes two practical issues. First, understandi..

Regular expressions are both terribly awkward and extremely useful. Properly understanding regular expressions will make you a more effective programmer. Creating a regular expression A regular expression is a type of object. It can be either constructed with the RegExp constructor or written as a literal value by enclosing a pattern in forward slash (/) characters. let re1 = new RegExp("abc"); ..

Language But here JavaScript’s looseness is a hindrance. Its concept of bindings and properties is vague enough that it will rarely catch typos before actually running the program. And even then, it allows you to do some clearly nonsensical things without complaint, such as computing true * "monkey". ... But often, your nonsense computation will merely produce NaN (not a number) or an undefined ..

Code const roads = [ "Alice's House-Bob's House", "Alice's House-Cabin", "Alice's House-Post Office", "Bob's House-Town Hall", "Daria's House-Ernie's House", "Daria's House-Town Hall", "Ernie's House-Grete's House", "Grete's House-Farm", "Grete's House-Shop", "Marketplace-Farm", "Marketplace-Post Office", "Marketplace-Shop", "Marketplace-Town Hall", "Shop-Town Hall" ]; function buildGraph(edges)..

Encapsulation The core idea in object-oriented programming is to divide programs into smaller pieces and make each piece responsible for managing its own state. Different pieces of such a program interact with each other through interfaces, limited sets of functions or bindings that provide useful functionality at a more abstract level, hiding their precise implementation. Such program pieces ar..

A large program is a costly program, and not just because of the time it takes to build. Size almost always involves complexity, and complexity confuses programmers. Confused programmers, in turn, introduce mistakes (bugs) into programs. A large program then provides a lot of space for these bugs to hide, making them hard to find. console.log(sum(range(1, 10))); It is more likely to be correct b..

(new 연산자를 사용하지 않고) 함수로써 Function 생성자를 호출하는 것은 생성자로 호출하는 것과 같습니다. https://developer.mozilla.org/ko/docs/Web/JavaScript/Reference/Global_Objects/Function Function Function 생성자는 새 Function 객체를 만듭니다. developer.mozilla.org