CODEWITHSUNDEEP
javascriptobject
YOUNG MIN CHO
YOUNG MIN CHO

Reputation: 261

How do I remove a values from javaScript object?

var object = {
   'ex1': '123',
   'ex2': '234',
   'ex3': '345',
   'ex4': '456',
   'ex5': '678'
}

What is the best way to remove values without remove property as follows?

var object = {
   'ex1': '',
   'ex2': '',
   'ex3': '',
   'ex4': '',
   'ex5': ''
}

Upvotes: 3

Views: 119

Answers (5)

Raffaele Pizzari
Raffaele Pizzari

Reputation: 1

I think there are all many approaches.

I like this one:

    const obj = {
      ex1: '123',
      ex2: '234',
      ex3: '345',
      ex4: '456',
      ex5: '678'
    }

    for (const p in obj) obj[p] = null;

    console.log(obj);

But I find also acceptable the one using ES6 iterators:

    const obj1 = {
      ex1: '123',
      ex2: '234',
      ex3: '345',
      ex4: '456',
      ex5: '678'
    }

    for (k of Object.getOwnPropertyNames(obj1)) {
      obj1[k] = null;
    }

    console.log(obj1);

Upvotes: 0

connexo
connexo

Reputation: 56843

Simply use for...in to iterate over the object properties:

var object = {
   'ex1': '123',
   'ex2': '234',
   'ex3': '345',
   'ex4': '456',
   'ex5': '678'
}

for (const prop in object) { object[prop] = '' };

console.log(object);

Upvotes: 3

omri_saadon
omri_saadon

Reputation: 10669

Also, you can reach it by using the reduce function.

var obj = {
   'ex1': '123',
   'ex2': '234',
   'ex3': '345',
   'ex4': '456',
   'ex5': '678'
}

const new_object = Object.keys(obj).reduce((agg, item) => {
  agg[item] = ''
  return agg
}, {})

console.log(new_object)

The reduce() method executes a reducer function (that you provide) on each member of the array resulting in a single output value.

EDIT:

Notice that reduce will return an new object (It will not override the existing object).

If you prefer to override the existing object, look at other answers who use the forEach loop.

Upvotes: 0

Shubham Khatri
Shubham Khatri

Reputation: 282130

Iterate though the object keys using Object.keys and set the values to empty. Also you need to name you object something other than Object since its already a predefined object in javascript.

var object = {
   'ex1': '123',
   'ex2': '234',
   'ex3': '345',
   'ex4': '456',
   'ex5': '678'
}

Object.keys(object).forEach(key => {
   object[key]  = ''
})
console.log(object);

Upvotes: 2

Nina Scholz
Nina Scholz

Reputation: 386868

You could get the keys, iterate and assign a wanted value to the properties.

var object = { ex1: '123', ex2: '234', ex3: '345', ex4: '456', ex5: '678' };

Object
    .keys(object)
    .forEach(k => object[k] = '');

console.log(object);

Upvotes: 3

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