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Additionally, it doesn’t help that the language is overly dependent on frameworks, particularly React and AngularJS. These frameworks make it difficult to write code independently. This can lead to problems because the code may not work as expected when it’s run on different websites.
Global variables are accessible from anywhere in the code, which can lead to confusion and difficult-to-debug problems. Additionally, because global variables are available to all functions and scripts within a website or application, they become a prime target for hackers.
- Code duplication: Whenever you have to write the same code multiple times, you’re encouraging repetition. This makes your code harder to read, understand, and maintain.
- Overuse of global variables: Whenever you store data in a global variable, other parts of your application can access it without having to declare a variable first. This can lead to spaghetti code and complicated dependencies between different parts of your application.
- Lack of abstraction: When you write code directly related to the underlying business logic, you’re putting yourself at a disadvantage when it comes time to change that logic. If you can abstract the underlying business logic, your refactoring will be easier and more efficient.
This means that you can assign any type of data to a variable, and the compiler will do its best to figure out what you’re trying to do. As you can imagine, this can lead to some very unexpected results.
Whereas classical inheritance in object-oriented programming languages like Java or C# enables a class to inherit all of the properties and methods of its parents, prototype inheritance allows a subclass to inherit only the properties and methods of its prototype.
This can create complicated codebases and lead to inconsistency throughout an application. The biggest problem with prototypes is that they can add significant performance overhead depending on how they’re used.
Every coding language includes a series of instructions for a computer to perform. Often, when you’re first learning a new language, you can get away with approaching syntax as just another set of rules that don’t mean anything other than what they say. But, when you start writing more advanced programs and dealing with non-trivial applications, semantics become an issue.
Understanding how syntax can be manipulated to create wildly different outcomes depending on context is an essential lesson that anyone who wants to work with programming should learn early on.
Different programming languages have different paradigms. Often, programmers will try to make their language as similar as possible to other languages that they’re more familiar with to make the language easier for them to learn.
However, using Google’s Closure compiler can alleviate some of these concerns. Closure allows you to test individual functions in isolation. However, some programmers argue that even with Closure, you’ll still find yourself falling back on tricks like wrapping sections of code in anonymous functions so you can focus on one section at a time rather than having an entire page open for testing purposes.
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