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![Objects: Setting & Getting var flight = { airline: "Oceanic", number: 815 }; alert(flight.airline); alert(flight.equipment); // undefined flight.equipment.status // throw "TypeError" flight.equipment = { model: 'Boeing 777' }; flight['flight-status'] = 'overdue'; alert(flight["flight-status"]);](https://image.slidesharecdn.com/javascriptthelanguage-110524074309-phpapp01/75/JavaScript-The-Language-10-2048.jpg)
![Miscellaneous: Arrays Literal notation: [true, 1, "string", {}] length property Not bounded Use push method to add to the end Is a weird object, not a "real" array](https://image.slidesharecdn.com/javascriptthelanguage-110524074309-phpapp01/75/JavaScript-The-Language-21-2048.jpg)
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JavaScript: The Language
The document provides an overview of fundamental JavaScript concepts, including syntax, objects, functions, and inheritance. It covers key topics such as data types, first-class functions, closures, and the prototypal inheritance model, detailing examples and specific features. Resources for further learning are also included to enhance understanding of JavaScript programming.
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JavaScript: The Language
- 1. Fundamental JavaScript: TheLanguage Presented by Brian Dukes
- 2. Where are wegoing? Feature Overview Syntax Objects Functions Inheritance Miscellaneous
- 3. Feature Overview 1stClass Functions Loose Typing Dynamic Objects Prototypal Inheritance Global Variables
- 4. Where are we?Feature Overview Syntax Objects Functions Inheritance Miscellaneous
- 5. Syntax: Primitive TypesNumber 64-bit floating, " double " String Surrounded by single or double quotes Boolean true or false Objects Key/value pairs Arrays Indexed collection Functions Callable code
- 6. Syntax: Truthy &Falsy Values Falsy values: false null undefined '' 0 NaN Truthy values: Everything else true , 'false' , {}
- 7. Syntax: Statements &Operators var if switch while for for in do while try throw return break with ternary ( ? : ) typeof || && == & === != & !== + !
- 8. Where are we?Feature Overview Syntax Objects Functions Inheritance Miscellaneous
- 9. Objects: Literals JSON(plus functions) Name/value pairs Name is any string Quotes are optional for legal name Value can be any JavaScript value: Other objects Functions Arrays
- 10. Objects: Setting &Getting var flight = { airline: "Oceanic", number: 815 }; alert(flight.airline); alert(flight.equipment); // undefined flight.equipment.status // throw "TypeError" flight.equipment = { model: 'Boeing 777' }; flight['flight-status'] = 'overdue'; alert(flight["flight-status"]);
- 11. Where are we?Feature Overview Syntax Objects Functions Inheritance Miscellaneous
- 12. Functions: Definition Functionsare objects Functions have a prototype Functions can have properties Functions can have methods Functions can be passed as arguments to functions Functions can be returned from functions Functions can be invoked
- 13. Functions: Closure Functionshave access to outer variables this & arguments are different for each function var i; for (i = 0; i < 10; i++) { setTimeout(function () { console.log(i*i); }, i); }
- 14. Functions: Scope Does not have block scope Unlike every other language with C style syntax Function scope function outer () { for (var i = 0; i < 10; i++) { var double = i+i; $link.click(function () { alert(double) }); } }
- 15. Functions: Callbacks Functionscan be passed to other functions makeAjaxCall(function (result) { alert(result); });
- 16. Functions: Module PatternCall an anonymous function after declaring it ( IIFE ) Keeps inner values from being accessible outside of the function (function () { var x = 1; }());
- 17. Where are we?Feature Overview Syntax Objects Functions Inheritance Miscellaneous
- 18. Inheritance: Pseudoclassical new operator Function names are capitalized, by convention Lots of downfalls
- 19. Inheritance: Prototype Allobjects has a prototype property When retrieving properties, any property not on the object is retrieved from its prototype If the property isn't on the prototype, its prototype is checked, etc.
- 20. Where are we?Feature Overview Syntax Objects Functions Inheritance Miscellaneous
- 21. Miscellaneous: Arrays Literalnotation: [true, 1, "string", {}] length property Not bounded Use push method to add to the end Is a weird object, not a "real" array
- 22. Miscellaneous: Regular ExpressionsPattern Matching Literal notation: /pattern/options
- 23. Resources JavaScript Weekly- http://javascriptweekly.com/ JSLint - http://www.jslint.com/ JSLint.VS2010 - http://bit.ly/JSLint-VS2010 jsFiddle - http://jsfiddle.net/ MDC - https://developer.mozilla.org This - http://www.slideshare.net/EngageSoftware/