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Discover how to create a `samePrice` function in JavaScript that checks whether all elements in an array correspond to the same value in an object.
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This video is based on the question https://stackoverflow.com/q/69946006/ asked by the user 'TheMilion' ( https://stackoverflow.com/u/10731363/ ) and on the answer https://stackoverflow.com/a/69946114/ provided by the user 'Jamiec' ( https://stackoverflow.com/u/219661/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Mastering JavaScript: Create a samePrice Function to Compare Array Values with Object Properties

JavaScript provides powerful ways to work with arrays and objects, but sometimes we need to perform specific checks to identify relationships between these data structures. One common problem developers face is verifying if all specified keys in an array have the same associated value in an object. In this guide, we'll explore how to solve this problem by implementing a function called samePrice.

Understanding the Problem

Imagine you have an array representing item identifiers and an object detailing the prices associated with those identifiers. The goal is to determine if all the elements in the array correspond to the same price in the object.

Example Scenarios

Given the following input:

[[See Video to Reveal this Text or Code Snippet]]

The expected output for samePrice(arr, obj) should be true since all items in the array have a price of 10.

Conversely, with this input:

[[See Video to Reveal this Text or Code Snippet]]

The output should be false, as item 0 has a price of 10 while item 3 has a price of 12.

Implementing the Solution

Let’s create the samePrice function using a more efficient approach than what was initially provided. Here’s how to do it:

Step-by-Step Breakdown

Use the every Method: This method will help us check if every element in our array meets a specific condition—in this case, that all elements correspond to the same value in the object.

Fetch the Price from the Object: We'll take the price associated with the first element of the array as a reference.

Compare All Prices: Our samePrice function will then confirm if all prices for the array's elements match the reference price using arrow function syntax.

Final Code Implementation

Here’s the complete samePrice function:

[[See Video to Reveal this Text or Code Snippet]]

Testing the Function

Let’s test our function with the previous examples to see if it behaves as expected:

[[See Video to Reveal this Text or Code Snippet]]

Conclusion

By utilizing the every method, we created a concise and efficient function that checks if all values tied to array indices in an object are identical. This approach not only simplifies the code but also enhances its readability.

Feel free to try implementing the samePrice function in your own JavaScript projects, and explore more cool functionalities that arrays and objects can offer!