JavaScript is a weakly-typed language that, unlike strong languages, does not require programmers to decide exactly what type of information each variable holds. Instead, the language uses generic variables. There are, however, several rules that you must follow to write JavaScript programmers that work as intended. This video tutorial from Lynda.com will help you in understanding strong, weak, and duck-typed languages so you can use JavaScript effectively.
In many programming languages when you create a variable, you don't just give it…a name but you must also say exactly what type of information is going to be…stored in that variable.…You must decide beforehand if it's going to store an integer, meaning a whole…number without anything after the decimal point, or perhaps a floating-point…number which might have a value after the decimal point or perhaps you need to…store a single character, just one letter, or perhaps multiple characters, what's…called a string, or is it a Boolean value, and that just means a value that can…only be true or false, or it could be even more complex type of data, but you…have to choose that data type.…
And once you have chosen it you are not allowed to change it, and that's what's…known as a strongly typed language.…You can create as many variables as you want but each variable must be of one…particular type and that's actually enforced and it can cause your program to…crash if you try to put the wrong type in a variable that wasn't designed for it,…
Author
Simon Allardice
Released
9/22/2011Finally, the course compares how code is written in several different languages, the libraries and frameworks that have grown around them, and the reasons to choose each one.
- Writing source code
- Understanding compiled and interpreted languages
- Requesting input
- Working with numbers, characters, strings, and operators
- Writing conditional code
- Making the code modular
- Writing loops
- Finding patterns in strings
- Working with arrays and collections
- Adopting a programming style
- Reading and writing to various locations
- Debugging
- Managing memory usage
- Learning about other languages
Skill Level Beginner
Duration
Views
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Introduction
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Welcome1m 13s
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1. Programming Basics
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What is programming?5m 45s
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Writing source code5m 34s
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2. Core Programming Syntax
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Why JavaScript?4m 45s
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Requesting input4m 50s
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3. Variables and Data Types
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Working with numbers5m 4s
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Working with operators4m 47s
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Properly using white space6m 46s
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4. Writing Conditional Code
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Setting comparison operators6m 59s
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5. Modular Code
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Breaking your code apart4m 1s
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Understanding variable scope2m 23s
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6. Iteration: Writing Loops
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Introduction to iteration4m 28s
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Writing a while statement5m 24s
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Creating a for loop3m 39s
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7. More About Strings
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8. Collections
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Working with arrays5m 46s
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Array behavior5m 29s
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9. Programming Style
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Programming style5m 55s
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Writing pseudocode4m 55s
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10. Input and Output
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Event driven programming7m 47s
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Introduction to file I/O6m 51s
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11. When Things Go Wrong
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Introduction to debugging5m 57s
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Understanding error messages3m 21s
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Using debuggers8m 2s
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12. Introduction to Object Orientation
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Using classes and objects6m 28s
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13. Advanced Topics
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14. Exploring the Languages
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Introduction to languages1m 42s
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C-based languages4m 40s
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The Java world3m 13s
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Ruby3m 4s
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Python2m 56s
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Objective-C4m 3s
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Libraries and frameworks3m 25s
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Conclusion
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Where to go from here1m 2s
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Video: Understanding strong, weak, and duck-typed languages