![]() ![]() Numbers can haveĭecimal points if they’re not integers. To use numbers, because you just type them as numbers. Numbers are precisely what they sound like-numbers. The first four types, the basic types, in this chapter. Null / undefined, array / object, and function. Types in JavaScript, namely number, string, boolean, These six possibilities (and more exist) make up the six most important data Pieces of data, or it can be a process that takes some data and generates new A datum can be a list or collection of other To the question “true or false?” It can also be the lack of information.ĭata can also be more complex. Latin word “datum.” A datum is a single piece of information, abstract as that It maybe helps to remember that the word “data” is the plural version of the Information,” but doesn’t that just pass the buck, because now we have to ask Had to draw a picture of “data,” what would it look like? We can say “data is We hear the word “data” every day, but what, precisely, does it mean? If you Now that we’ve got a bit of an introduction to the language’s history andĬontext out of the way, we can go back to the JavaScript console you learned But it’s also why it’s so easy for programmers to cause trouble This is part of why it’s soĮasy to learn. JavaScript is very flexible and very forgiving. These are details that goīeyond the scope of this course, but they gesture towards the idea that Now programmers are focusing more on these good parts (it helps that CrockfordĮven wrote a book about JavaScript’s goodĪs Crockford likes to point out, JavaScript is many things to many people,Īllowing itself to be used in three different programming paradigms. AfterĪll, back in 2001 Crockford called JavaScript “ the world’s most misunderstood Nevertheless, he adds, it also has some very good parts. JavaScript, as Crockford is fond to point out, has a lot of bad parts that are Standardizing involved a process of maintaining compatibility. Once Microsoft put their own version of JavaScript in Internet Explorer, itīecame clear that in order for JavaScript to be useful across the entire web, Java applets on websites, so Netscape called Eich’s language “JavaScript,”ĭespite the fact that JavaScript inherited nearly nothing substantial from Java was positioned to be “the language for the web,” as we would be running Language for their web browser, Navigator, and Eich delivered. JavaScript was written over ten days by one man, Brendan The short version of Crockford’s history boils down to the fact that The implications of both points reveal why JavaScript has its quirks and why Obsolete technologies fade away slowly.The people who should be the first to recognize the value of an innovation.In the way computing has evolved over time: They get pretty geeky, what Crockford does well is hammer home two key points Lectures are aimed at people with some programming knowledge, meaning that Of his Crockford on JavaScript lectures, “ The Early Speaking a few decades later, Douglas Crockford picks up the thread from whereīurke ended it (punchcards) and moves us all the way up to JavaScript in two To organize information is, not coincidentally, the first part of programming Key to how computers work is related to how they organize information. The fourth episode of the BBC show Connections draws aīegins with the Roman era Barbegal aqueduct andīurke concludes his wry take on advances in technology with punch cards, but General when understanding why JavaScript looks like it does today. But that means,Ĭoncretely, that it helps to have a sense of the history of programming in Might be especially good at revealing its mixed parentage. JavaScript is no different in fact, JavaScript With parts they like from another, and then add their own, new additions that Writer(s) of a language will take parts they like from one language and mix it Programming languages inherit from previous programming languages. I mentioned a few details about JavaScript’s history in the FAQs, but I’ll reiterate some of that now. JavaScript, however, I think it might be useful to learn a bit about 1 Before we get too carried away with writing Is a way of using JavaScript to tell the console to output There’s a lot going on in just this one example, but, briefly, console.log() The console responded to your single line of JavaScript, after the //->. Note that I have included the > prompt in this example, along with the how log ( "Hello, World!" ) //-> Hello, World! ![]()
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