how can remove array of object element without slice, splice-CodePudding

I am trying to delete a single object from the below object of arrays. I have tried with slice but sometimes it doesn't work. That's why I want to try different methods.

{
  id: "6252de4b27082fd83b94e3f4";
  options: [
    { title: "extra Tomato", price: 2 },
    { title: "ketchup", price: 1 },
    { title: "medium", price: 3 },
  ];
  price: 5.1;
  quantity: 1;
  title: "Carroll Montgomery";
}

suppose I want to delete medium object my expected output would be:

{
  id: "6252de4b27082fd83b94e3f4";
  options: [
    { title: "extra Tomato", price: 2 },
    { title: "ketchup", price: 1 },
  ];
  price: 5.1;
  quantity: 1;
  title: "Carroll Montgomery";
}

CodePudding user response：

You can try using the Array.filter method. Just provide the title you want to delete and you would get the deleted array. Doing so, we don't mutate the original array, instead we create a new one with the value removed.

const obj = {
  id: '6252de4b27082fd83b94e3f4',
  options: [
    { title: 'extra Tomato', price: 2 },
    { title: 'ketchup', price: 1 },
    { title: 'medium', price: 3 },
  ],
  price: 5.1,
  quantity: 1,
  title: 'Carroll Montgomery',
}

obj.options = obj.options.filter((item) => item.title !== 'medium')
console.log(obj)

CodePudding user response：

filter out the item you don't want.

const obj = {
  id: '6252de4b27082fd83b94e3f4',
  options: [
    {title: 'extra Tomato', price: 2},
    {title: 'ketchup', price: 1},
    {title: 'medium', price: 3}
  ],
  price: 5.1,
  quantity: 1,
  title: 'Carroll Montgomery'
};

function removeItem(item) {

  // Destructure the options from the object
  const {options, ...rest } = obj;

  // Return a new object with a filtered
  // array of options
  return {
    ...rest,
    options: options.filter(el => {
      return el.title !== item;
    })
  };

}

console.log(removeItem('medium'));

CodePudding user response：

Here you should just write custom slice function;

var data = {id: "6252de4b27082fd83b94e3f4",
options: [
{title: 'extra Tomato', price: 2},
{title: 'ketchup', price: 1},
{title: 'medium', price: 3}],
price: 5.1,
quantity: 1,
title: "Carroll Montgomery"};

data["options"] = data.options.filter(function(value, index, arr){ 
    return value.title != "medium";
});

console.log(data);

CodePudding user response：

You can use arrays.filtet(....) to remove item from array

obj.options = obj.options.filter((data) => data.title !== 'medium' || data.title !== 'ketchup')
console.log(obj)