Replace keys in an array based on another lookup/mapping array

🚀 The Ultimate Guide to Replacing Keys in an Array 🔄

So, you have an array with numerical keys, but you want to replace them with human-readable names. No worries, we got you covered! In this guide, we'll explore some common issues, provide easy solutions, and help you transform that array efficiently. Let's dive in! 💪

Common Issues

You might encounter a few challenges when replacing keys in an array. Here are some common issues:

1. Sequential vs Non-Sequential Numerical Values: If your numerical keys are sequential, you can directly replace them with human-readable names using a simple mapping array. However, if the keys are non-sequential or don't follow a specific pattern, you'll need a slightly different approach.

2. Preserving Values: It seems like you only want to replace the keys while keeping the values intact. This constraint adds an additional level of complexity to the problem.

Easy Solutions

Fortunately, there are a few easy ways to solve this problem. Let's explore some possible solutions:

Solution 1: Using a Mapping Array

If your numerical keys are sequential, you can create a mapping array that relates the numerical keys to their corresponding human-readable names. Here's an example:

const mappingArray = [
  { key: 1, name: "John" },
  { key: 2, name: "Jane" },
  { key: 3, name: "Tom" },
  // ...
];

const transformedArray = originalArray.map(item => {
  const mappedItem = mappingArray.find(mapped => mapped.key === item.key);
  return { name: mappedItem.name, value: item.value };
});

In this example, we use the map() function to iterate over the original array and transform each item. By finding the corresponding human-readable name in the mapping array, we can replace the numerical key with the desired name.

Solution 2: Using an Object as a Lookup Table

If your numerical keys are non-sequential or don't follow a specific pattern, you can use an object as a lookup table. Here's an example:

const lookupTable = {
  1: "John",
  10: "Jane",
  42: "Tom",
  // ...
};

const transformedArray = originalArray.map(item => {
  return { name: lookupTable[item.key], value: item.value };
});

In this example, we create an object lookupTable that maps numerical keys to their corresponding human-readable names. By accessing the desired name using lookupTable[item.key], we can easily replace the numerical key in the transformed array.

🌟 Call-to-Action: Share Your Thoughts!

Now that you know how to replace keys in an array based on another lookup/mapping array, it's time to put your knowledge into action! Try out these solutions and see which one works best for you. Don't forget to share your experience and thoughts in the comments section. We can't wait to hear from you! 🎉

Remember, transforming arrays can be tricky, but with the right approach, you'll soon master it like a pro. Keep coding and keep experimenting! 💻✨