How to write a duplicate removal method in vue

In Vue development, array deduplication operations are often involved. How to deal with the duplication problem efficiently? This article will introduce a Vue-based deduplication method to help you solve this problem.

1. Requirements Analysis

In the Vue application, we need to deduplicate the array. Suppose we have an array arr. The current requirement is to remove duplicate elements in arr and retain only non-duplicate elements. Specifically, it can be divided into the following two steps:

1. Traverse the array arr and obtain the unique elements in the array.
2. Store unique elements in another array.

2. Code Implementation

We can use Vue’s calculated properties to implement deduplication operations. The specific code is as follows:

computed: {
  distinctArr() {
    let arr = this.arr;
    return Array.from(new Set(arr));
  }
}

In the above code, we define A calculated attribute distinctArr is created, which returns the deduplicated result in array arr. We use the Set data structure in ES6 to remove duplication, and use Array.from() to convert the Set result into an array and return it. This method is simple and intuitive to use, and it is also very efficient.

3. Code Optimization

In the above code, we wrote the code logic using arr in the calculated attribute. In fact, we can encapsulate the deduplication operation into a method to improve the readability and maintainability of the code. The specific code is as follows:

methods: {
  distinct(arr) {
    return Array.from(new Set(arr));
  }
},
computed: {
  distinctArr() {
    let arr = this.arr;
    return this.distinct(arr);
  }
}

In the above code, we encapsulate the deduplication operation into a method distinct, which separates the specific implementation logic and calculated attributes, improving the readability and maintainability of the code.

4. Summary

This article introduces a Vue-based array deduplication method, which implements efficient deduplication operations through Vue's calculated properties and the Set data structure in ES6. And through the encapsulation method, the readability and maintainability of the code are improved. I hope this article will be helpful to everyone's Vue project development.

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