What is the best way to delete a property from an object in an array?

Question

What is the best way to delete a property from an object in an array?

I have a Vue component with an array that includes IDs which I want to remove while keeping the other elements intact. Is there a way to achieve this within a method?

Is it possible to filter out the ID index from the array using Vue methods?

var vm = 
new Vue({
  el: "#app",
  data: {
    options: [
      {id:100, option:"1 - John Doe"},
      {id:200, option:"2 - Jane Doe"}
    ]
  },
  methods: {
    getNames(){
      
      let names = this.options;
      
      console.log(names);
    }
  }
  
  })

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<button @click="getNames()">TEST</button>
</div>

javascript vue.js

Answer 1

Answer №1

To iterate over the array and generate a new array of names

var vm = 
new Vue({
  el: "#app",
  data: {
    options: [
      {id:100, option:"1 - John Doe"},
      {id:200, option:"2 - Jane Doe"}
    ]
  },
  methods: {
    getNames(){
      
      let names = this.options.map(option => {
        return { 
          option: option.option
        }
      });
      
      console.log(names);
    }
  }
  
  })

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<button @click="getNames()">TEST</button>
</div>

Answer 2

To iterate over the array and generate a new array of names

var vm = 
new Vue({
  el: "#app",
  data: {
    options: [
      {id:100, option:"1 - John Doe"},
      {id:200, option:"2 - Jane Doe"}
    ]
  },
  methods: {
    getNames(){
      
      let names = this.options.map(option => {
        return { 
          option: option.option
        }
      });
      
      console.log(names);
    }
  }
  
  })

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<button @click="getNames()">TEST</button>
</div>

Answer 3

Answer №2

If you want to extract names using the map method, you can do it as follows:

var vm = 
new Vue({
  el: "#app",
  data: {
    options: [
      {id:100, option:"1 - John Doe"},
      {id:200, option:"2 - Jane Doe"}
    ]
  },
  methods: {
    getNames(){
      
      let names = this.options.map(o => o.option);
      
      console.log(names);
    }
  }
  
  })

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<button @click="getNames()">TEST</button>
</div>

Answer 4

If you want to extract names using the map method, you can do it as follows:

var vm = 
new Vue({
  el: "#app",
  data: {
    options: [
      {id:100, option:"1 - John Doe"},
      {id:200, option:"2 - Jane Doe"}
    ]
  },
  methods: {
    getNames(){
      
      let names = this.options.map(o => o.option);
      
      console.log(names);
    }
  }
  
  })

<script src="https://cdnjs.cloudflare.com/ajax/libs/vue/2.5.17/vue.js"></script>
<div id="app">
<button @click="getNames()">TEST</button>
</div>

Answer 5

Answer №3

This task focuses on utilizing pure JavaScript without relying on VueJS or any other framework.

There are two main approaches that can be taken: preserving necessary elements or eliminating unnecessary ones:

map: used to convert each original element into a new format and produce a new array
forEach with delete: employed to remove unwanted properties from the existing array

let options: [
  {id:100, option:"1 - John Doe"},
  {id:200, option:"2 - Jane Doe"}
];

// creating a new array of strings
let strings = options.map(o => o.option);
console.log(strings);

// modifying the original array by deleting a specific property
options.forEach(o => delete o.id);
console.log(options);

For further reference: Remove property for all objects in array

Answer 6

This task focuses on utilizing pure JavaScript without relying on VueJS or any other framework.

There are two main approaches that can be taken: preserving necessary elements or eliminating unnecessary ones:

map: used to convert each original element into a new format and produce a new array
forEach with delete: employed to remove unwanted properties from the existing array

let options: [
  {id:100, option:"1 - John Doe"},
  {id:200, option:"2 - Jane Doe"}
];

// creating a new array of strings
let strings = options.map(o => o.option);
console.log(strings);

// modifying the original array by deleting a specific property
options.forEach(o => delete o.id);
console.log(options);

For further reference: Remove property for all objects in array

What is the best way to delete a property from an object in an array?

Answer №1

Answer №2

Answer №3

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