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1 files changed, 37 insertions, 30 deletions
diff --git a/javascript.html.markdown b/javascript.html.markdown index 9c4f06fc..cce488e1 100644 --- a/javascript.html.markdown +++ b/javascript.html.markdown @@ -16,12 +16,8 @@ JavaScript isn't just limited to web browsers, though: Node.js, a project that provides a standalone runtime for Google Chrome's V8 JavaScript engine, is becoming more and more popular. -Feedback would be highly appreciated! You can reach me at -[@adambrenecki](https://twitter.com/adambrenecki), or -[adam@brenecki.id.au](mailto:adam@brenecki.id.au). - ```js -// Comments are like C. Single-line comments start with two slashes, +// Comments are like C's. Single-line comments start with two slashes, /* and multiline comments start with slash-star and end with star-slash */ @@ -149,6 +145,10 @@ someOtherVar = 10; // Variables declared without being assigned to are set to undefined. var someThirdVar; // = undefined +// if you wan't to declare a couple of variables, then you could use a comma +// separator +var someFourthVar = 2, someFifthVar = 4; + // There's shorthand for performing math operations on variables: someVar += 5; // equivalent to someVar = someVar + 5; someVar is 10 now someVar *= 10; // now someVar is 100 @@ -287,12 +287,9 @@ myFunction("foo"); // = "FOO" // Note that the value to be returned must start on the same line as the // `return` keyword, otherwise you'll always return `undefined` due to // automatic semicolon insertion. Watch out for this when using Allman style. -function myFunction() -{ +function myFunction(){ return // <- semicolon automatically inserted here - { - thisIsAn: 'object literal' - } + {thisIsAn: 'object literal'} } myFunction(); // = undefined @@ -306,6 +303,12 @@ setTimeout(myFunction, 5000); // Note: setTimeout isn't part of the JS language, but is provided by browsers // and Node.js. +// Another function provided by browsers is setInterval +function myFunction(){ + // this code will be called every 5 seconds +} +setInterval(myFunction, 5000); + // Function objects don't even have to be declared with a name - you can write // an anonymous function definition directly into the arguments of another. setTimeout(function(){ @@ -527,28 +530,32 @@ if (Object.create === undefined){ // don't overwrite it if it exists ## Further Reading -The [Mozilla Developer -Network](https://developer.mozilla.org/en-US/docs/Web/JavaScript) provides -excellent documentation for JavaScript as it's used in browsers. Plus, it's a -wiki, so as you learn more you can help others out by sharing your own -knowledge. +The [Mozilla Developer Network][1] provides excellent documentation for +JavaScript as it's used in browsers. Plus, it's a wiki, so as you learn more you +can help others out by sharing your own knowledge. + +MDN's [A re-introduction to JavaScript][2] covers much of the concepts covered +here in more detail. This guide has quite deliberately only covered the +JavaScript language itself; if you want to learn more about how to use +JavaScript in web pages, start by learning about the [Document Object Model][3]. + +[Learn Javascript by Example and with Challenges][4] is a variant of this +reference with built-in challenges. -MDN's [A re-introduction to -JavaScript](https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript) -covers much of the concepts covered here in more detail. This guide has quite -deliberately only covered the JavaScript language itself; if you want to learn -more about how to use JavaScript in web pages, start by learning about the -[Document Object -Model](https://developer.mozilla.org/en-US/docs/Using_the_W3C_DOM_Level_1_Core) +[JavaScript Garden][5] is an in-depth guide of all the counter-intuitive parts +of the language. -[Learn Javascript by Example and with Challenges](http://www.learneroo.com/modules/64/nodes/350) is a variant of this reference with built-in challenges. +[JavaScript: The Definitive Guide][6] is a classic guide and reference book. -[JavaScript Garden](http://bonsaiden.github.io/JavaScript-Garden/) is an in-depth -guide of all the counter-intuitive parts of the language. +In addition to direct contributors to this article, some content is adapted from +Louie Dinh's Python tutorial on this site, and the [JS Tutorial][7] on the +Mozilla Developer Network. -[JavaScript: The Definitive Guide](http://www.amazon.com/gp/product/0596805527/) is a classic guide / reference book. -In addition to direct contributors to this article, some content is adapted -from Louie Dinh's Python tutorial on this site, and the [JS -Tutorial](https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript) -on the Mozilla Developer Network. +[1]: https://developer.mozilla.org/en-US/docs/Web/JavaScript +[2]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript +[3]: https://developer.mozilla.org/en-US/docs/Using_the_W3C_DOM_Level_1_Core +[4]: http://www.learneroo.com/modules/64/nodes/350 +[5]: http://bonsaiden.github.io/JavaScript-Garden/ +[6]: http://www.amazon.com/gp/product/0596805527/ +[7]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript |