js array value is the property value of another object array

Understanding JS Array Value as Property Value of Another Object Array

JavaScript is a popular programming language and it is widely used in web development. It is a high-level, interpreted, and dynamically typed language. One of the key features of JavaScript is its ability to handle arrays and objects. In this article, we will discuss how to access an array value as a property value of another object array in JavaScript.

Example

Let's say we have an object array that contains some values:

// Object array
var fruits = [
  {name: 'apple', color: 'red'},
  {name: 'banana', color: 'yellow'},
  {name: 'grape', color: 'green'}
];

Now, let's say we have another array that contains some values:

// Array
var colors = ['red', 'yellow', 'green'];

We want to access the name property of the fruit object whose color property matches the value of the colors array. To do this, we can use the JavaScript find() method.

var result = fruits.find(fruit => fruit.color === colors[0]);
console.log(result.name); // Output: apple 

In the above code, we are using the find() method to search for the fruit object whose color property matches the first element of the colors array. We are then accessing the name property of the resulting object and printing it to the console.

Another way to do it:

We can also use a for loop to iterate over the fruits array and check if each object's color property matches the value of the colors array.

var result;
for (var i = 0; i < fruits.length; i++) {
  if (fruits[i].color === colors[0]) {
    result = fruits[i].name;
    break;
  }
}
console.log(result); // Output: apple 

In the above code, we are iterating over the fruits array using a for loop and checking if each object's color property matches the first element of the colors array. If we find a match, we store the name property of the object in the result variable and break out of the loop. We then print the result to the console.

Conclusion

Accessing an array value as a property value of another object array in JavaScript can be done using various methods. The find() method and for loop are two popular methods for achieving this. It's important to understand how to work with arrays and objects in JavaScript as they are fundamental building blocks of web development.