To develop a website that meets today's demands, there are numerous decisions that a programmer must take. After all of these decisions have been made, countless tips should ensure a better user’s experience. No matter which path you choose, one thing is certain: Every developer is prone to errors.
As a web developer, the pursuit of perfection is often the top priority: The product should be as user-friendly, stable, and reliable as possible, as well as naturally attractive and filled with useful content. Since there are so many things to consider at the same time, details may be forgotten or viewed as not so important. We have summarized the most common mistakes in web development, giving tips on how to avoid them.
Types of errors in programming
1. Errors in compilation time
Compilation errors occur because the language syntax is not correct, this type of errors does not allow the application to run, for example:
- Forgetting about a semicolon at the end of a sentence.
- Not closing braces in any code block, method, class, or in any control structure.
- Repeating variables with the same name even if they are of a different type.
- Assigning a variable with a different data type to a variable: that is, if you have a String variable, you assign it to a variable of the int type. In this case, the compiler will give you a type conversion error and this will not allow the application to get started. As the application compiles, even a similar error can occur in variables of groups of the same type, for example assigning the value of an int type to a short type.
In general, these types of errors are syntax. Fortunately, IDEs like Eclipse, Netbeans help a lot to recognize them and give us an idea of what may be happening to correct them. In some cases they even solve them.
2. Errors in execution time
These errors occur when the application is running, imagine that when you are doing the presentation or testing your application in public and suddenly the application explodes (hangs), generally these types of errors are known as compilation errors. Now, why do these errors occur? Well, there are many factors from the most basic ones, such as:
- The user enters different values than the ones the application receives
- Accessing a position in an arrangement that does not exist.
- Storing strings where numbers should be stored
- Division by zero.
Let's say that a mobile application consumes data from a web service and that at the time of consuming that data there is no internet connection: this causes the application to hang.
3. Logical errors
These are the most difficult to detect and correct, it is that with these types of errors the application compiles and runs normally, but then you find an error. The error occurs because the application does not show the expected results, let's say that you already did the algorithm and the result that you should obtain is 10, but in the application, you get 5. In the worst-case scenario, you write the code and do tests. The results are correct, so you go up to production and it turns out that for a particular case the expected result was not obtained.
In these cases, the problem is logical errors that occur due to the poor design of the application's algorithm.
We should also mention that another error of logical type also occurs when we place a semicolon after an if or for a statement.
Since every developer naturally wants to create the perfect web product, it takes an immense amount of time. Countless tests and long code passages mean that you quickly get lost in time. If you then also notice that other developers achieve a lot more at the same time, that leads to frustration and more and more work.
If in a development phase you discover that you are not getting anywhere or are simply losing too much time, efficient resource management helps. However, it is just as helpful to carefully consider the tools used – if you study how they work correctly at the beginning, this will save you a lot of trouble and time afterward. There are also countless tools on the web that simplify testing and troubleshooting. The automation of processes also ensures less stress and errors; Grunt is a helpful tool for this.
A piece of advice from our programmers:
- Consider the division by zero, as for the arrangements not to access positions that do not exist.
- Make use of exceptions and validations when it is considered that the user can enter different values than those that the application can receive.
- When we design an algorithm, consider all the possible scenarios that the application may take during its execution.
- Finally, as the saying goes, divide and conquer: a good way to counteract errors of a logical type is to divide large and complex algorithms into small tasks so that the code is more readable and any errors of a logical type can be easily debugged.
If you follow the tips and are aware of the most common mistakes in web development, you can save yourself some frustration. Mistakes happen and this is not bad; you just have to recognize them, understand them, and finally fix them. If you succeed in that, nothing stands in the way of a relaxed development process with an all-satisfactory result.
It's your turn, tell us what types of errors you have made the most, compilation, execution, or logic?