JavaScript's dependency injection functionality is ineffective

Question

JavaScript's dependency injection functionality is ineffective

I am looking to create a function named createCoffee which will take a function argument called knowHow.

    function createCoffee(knowHow){
var x=new knowHow(coffee,beans,milk,sugar);
knowHow.create();
}

This will allow me to use different knowHow functions for creating the coffee.

Next, I will define a sample knowHow function:

    var x=function oneWay(a,b,c,d){
console.log(a+b+c+d)
};

Then I will pass x to the createCoffee function.

Subsequently, I will initialize variables a=5, b=1, c=2, d=2 and call createCoffee(x).

The expected outcome is the logging of the sum of the variables. Could it be related to variable scope?

Is my example logically correct? How can I specify the variables in the oneWay(...) function?

javascript

Answer 1

Answer №1

Here's a more efficient way to declare variables for coffee, beans, milk, and sugar:

let coffee=5, beans=1, milk=2, sugar=2;

Answer 2

Here's a more efficient way to declare variables for coffee, beans, milk, and sugar:

let coffee=5, beans=1, milk=2, sugar=2;

Answer 3

Answer №2

Many thanks to all who contributed. I successfully accomplished my goal by approaching it in the following manner:

function coffeeMaker(knowledge,coffee,milk,sugar){
    knowledge.create(coffee,milk,sugar);
}

var x={create: function customizedMethod(a,b,c){
    console.log(a+b+c);
}};

coffeeMaker(x,2,3,4);

My objective was to implement the program with an interface-oriented approach similar to that used in Java.

In Java, you can pass a reference to an interface and have different implementations, which is what I aimed for.

This allows me to modify the 'knowledge' object and connect it to the coffeeMaker function.

Although it may seem redundant in this particular scenario, when dealing with numerous behaviors associated with an object, this method proves to be quite effective. My inspiration for this approach comes from the Strategy design pattern.

Answer 4

Many thanks to all who contributed. I successfully accomplished my goal by approaching it in the following manner:

function coffeeMaker(knowledge,coffee,milk,sugar){
    knowledge.create(coffee,milk,sugar);
}

var x={create: function customizedMethod(a,b,c){
    console.log(a+b+c);
}};

coffeeMaker(x,2,3,4);

My objective was to implement the program with an interface-oriented approach similar to that used in Java.

In Java, you can pass a reference to an interface and have different implementations, which is what I aimed for.

This allows me to modify the 'knowledge' object and connect it to the coffeeMaker function.

Although it may seem redundant in this particular scenario, when dealing with numerous behaviors associated with an object, this method proves to be quite effective. My inspiration for this approach comes from the Strategy design pattern.

JavaScript's dependency injection functionality is ineffective

Answer №1

Answer №2

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