Dependency Injection is a technique in OOP that connects to another program, allowing for easy addition of features. It can make coding more complicated and slow down the program. It is sparingly used due to potential errors and excessive code. New programmers prefer it, but professionals and vendors avoid it. Automatic referencing is available in most OOP schemes.
Dependency Injection is a technique used in Object Oriented Programming (OOP). This technique references, or connects to, another program and makes the original program dependent on the referenced program. This allows programmers to instantly add extra functions or features to the original program, but it also makes coding more complicated and adds excessive coding that could slow down the program. Most OOP programs allow programmers to reference a variety of installed programs without having to add code.
The use of dependency injection is often sparing in most programs. To make the program dependent, the programmer writes code that refers to some or all of another program. Normally, you can refer to any installed program, but some coding schemes allow you to refer only to specific programs. For example, if the programmer wants to add text functionality to the program, instead of creating the function manually, he can refer to a word processing program. This way, the original program now has new functionality, but it depends on the other program working and remaining installed on the computer.
Most new programmers prefer to use dependency injection instead of building features manually. This is because building functionality can be complicated, and new programmers may not know how to effectively build functionality. By referencing a program, the programmer does not need to know coding and any functionality can be added with just a few lines of code.
There are many problems with dependency injection, especially if the program is meant for consumers, which is why it is often unused or sparingly used by professionals and software vendors. One of the most obvious problems with consumer-side dependency injection is the possibility that the consumer might not have the referral program. If the program is constructed to reference a feature in Program A, but the consumer has not installed Program A, the feature or the entire program will experience a debilitating error.
At high levels of addiction, where different programs are referenced, other problems manifest. Referencing one or two programs creates a small amount of code, but doing more can require excessive code that slows down the program. If the program has an error, there is now a great deal of complicated code for the programmer to analyze to find the error, especially since the error may be with the referenced program and not the original program.
Many new programmers use dependency injection, so most OOP schemes offer an automatic way to reference a program. This allows the programmer, with just a few clicks of the mouse, to make the reference connection. Automatically referencing a program often adds a little more code than manually writing the reference, but since the programmer is new and the program most likely won’t go to consumers, this shouldn’t present any serious problems.
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