CODEWITHSUNDEEP
javascripttypescript
Panda
Panda

Reputation: 415

How to remove data from another data array that already existed in angular

How to remove data from another data array that already existed.

for example:

data = [{
 name: "james",
 device: "device1"
}, {
 name: "justine",
 device: "device2"
}];

device = [
 'device1', 'device2', 'device3', 'device4', 'device5'
];

how to remove the device that already exist?

expected output:

device = ['device3', 'device4', 'device5'];

Upvotes: 1

Views: 38

Answers (2)

palaѕн
palaѕн

Reputation: 73906

You can try this:

const data = [{name:"james",device:"device1"},{name:"justine",device:"device2"}];
let device = ["device1","device2","device3","device4","device5"];

// Get all the devices to be removed first
var remove = data.map(({device}) => device)

// Delete the above devices which are present in device array
// using filter() method
device = device.filter(d => !remove.includes(d));

console.log(device)
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Upvotes: 2

ddprrt
ddprrt

Reputation: 7574

First, get an array of the "existing" devices from your data structure:

const usedDevices = data.map((el) => el.device)

Then, filter all devices by checking if they are in your usedDevices list

const remaining = device.filter((el) => usedDevices.indexOf(el) < 0)

There you go:

console.log(remaining)

Upvotes: 2

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