Скачать или смотреть Calculate Dog Voting Percentages in a Vuex Voting App

Learn how to effectively `calculate and update voting percentages` in Vuex for a dog voting app. Follow this guide to enhance your Vue.js application.
---
This video is based on the question https://stackoverflow.com/q/62225324/ asked by the user 'kayak' ( https://stackoverflow.com/u/8045149/ ) and on the answer https://stackoverflow.com/a/62227571/ provided by the user 'buzatto' ( https://stackoverflow.com/u/9238134/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: Vuex: Calculate percentage of values in array of objects, and update the value in a component

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
Calculate Dog Voting Percentages in a Vuex Voting App

Creating a voting application is a fun way to practice with Vue.js and Vuex, but it comes with its own set of challenges. One common requirement is to calculate the percentage of votes each dog receives and update this in real-time as votes are cast. In this guide, we'll walk through the steps to implement this functionality in your Vuex-based voting app.

The Problem

You have a voting app where users can vote for their favorite dogs. You successfully update the number of votes each dog receives, but now you want to calculate what percentage of the total votes each dog has gained and update these percentages accordingly. Your goals are:

Get the total number of votes.

Calculate the percentage of votes for each dog.

Update all the dog percentages dynamically.

The Solution

Step 1: Remove Percentage from State

Firstly, you'll want to consider removing percentage from your state. Since the percentage is derived from the total number of votes, you don’t need to store it in the state directly. Instead, you can compute it on-the-fly using Vuex getters.

Step 2: Add Getters to Calculate Votes and Percentages

You can define two new getters in your Vuex store: one for calculating the total number of votes and another for calculating the percentage of votes for each dog.

Update the Store

Your store.js should now look like this:

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

Step 3: Update Result Component to Use Getters

Now that we have these new getters, you can modify the Result.vue component to utilize them instead of accessing dog.percentage directly.

Update Result.vue

Adjust the Result.vue file as follows:

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

Step 4: Embrace Realtime Updates

With these changes, every time you cast a vote, the percentages will automatically recalculate based on the new total votes, keeping your UI up to date effortlessly.

Key Points to Remember

Keep your state lean. Store only what you need, and calculate derived values using getters.

Make use of Vuex's reactivity to ensure your UI updates in real-time.

Test your implementation thoroughly to ensure correctness.

Conclusion

This approach allows you to maintain a clean Vuex store while ensuring your voting application's UI is always up-to-date with real-time voting percentages. By computing the percentages dynamically through Vuex getters, you enhance the maintainability of your code, streamline updates, and keep all logic centralized. Happy coding!