What is the best way to merge multiple arrays nested within another array while removing the final character from each word?

Question

What is the best way to merge multiple arrays nested within another array while removing the final character from each word?

We have a 2D array:

    let userGroup = [
    ['user1-', 'user2-', 'user3-'],
    ['user4-', 'user5-', 'user6-'], 
    ['user7-', 'user8-', 'user9-']
];

How can we create a single array from it and remove the "-" symbol at the end of each element?

The desired output is: ['user1, 'user2', 'user3', 'user4', 'user5', 'user6', 'user7', etc...]

Moreover, how can we write a function that can handle any number of inner arrays in the "userGroup" array? For instance, if there are unexpected inner arrays with more users (['user11', 'user12', 'user13], etc.), how do we create a function that takes the "userGroup" array as input and achieves the same result (remove the last "-" in each element and combine all elements in the inner arrays into one array)?

javascript arrays function

Answer 1

Answer №1

Another option is to utilize the newer flat method, which is a more recent addition; by default, it only flattens to a single level, but you can specify the depth.

userGroup.flat().map(element => element.slice(0, -1));

Answer 2

Another option is to utilize the newer flat method, which is a more recent addition; by default, it only flattens to a single level, but you can specify the depth.

userGroup.flat().map(element => element.slice(0, -1));

Answer 3

Answer №2

Here is a possible solution:

 console.log(userGroup.reduce((acc, curr)=> [...acc, ...curr], [])
    .map(el => el.replace('-','')));

Answer 4

Here is a possible solution:

 console.log(userGroup.reduce((acc, curr)=> [...acc, ...curr], [])
    .map(el => el.replace('-','')));

Answer 5

Answer №3

To keep it concise, you could try this one-liner:

const transformed = userGroup.reduce((previous, current) => previous.concat(current), []).map(string => string.slice(0, string.length-1));

Answer 6

To keep it concise, you could try this one-liner:

const transformed = userGroup.reduce((previous, current) => previous.concat(current), []).map(string => string.slice(0, string.length-1));

Answer 7

Answer №4

Check out this code snippet

[].concat.apply([], groupOfUsers).toString().split('-,');

Answer 8

Check out this code snippet

[].concat.apply([], groupOfUsers).toString().split('-,');

Answer 9

Answer №5

If you need to flatten an array, look no further than Array.prototype.flat

groupOfUsers.flat()

This will give you a flat array from your nested arrays.

Next, utilize the Array.prototype.map method to manipulate the values according to your requirements

groupOfUsers.flat().map(item => item.replace('-', ''));

Answer 10

If you need to flatten an array, look no further than Array.prototype.flat

groupOfUsers.flat()

This will give you a flat array from your nested arrays.

Next, utilize the Array.prototype.map method to manipulate the values according to your requirements

groupOfUsers.flat().map(item => item.replace('-', ''));

Answer 11

Answer №6

Accomplishing your objective requires a few essential tools.

.replace()

const u = 'user1-';

console.log(u.replace('-', ''));

.map()

const u = ["user1-", "user2-", "user3-"];

const m = u.map(i => i.replace("-", ""));

console.log(m);

.flat()

const u = [
  ["user1-", "user2-"],
  ["user3-", "user4-"]
];

console.log(u.flat());

To implement all three methods in one line of code, use the following:

let userGroup = [
  ['user1-', 'user2-', 'user3-'],
  ['user4-', 'user5-', 'user6-'],
  ['user7-', 'user8-', 'user9-']
];

   let grouped = userGroup.flat().map(item => item.replace('-', ''));
   console.log(grouped)

Answer 12

Accomplishing your objective requires a few essential tools.

.replace()

const u = 'user1-';

console.log(u.replace('-', ''));

.map()

const u = ["user1-", "user2-", "user3-"];

const m = u.map(i => i.replace("-", ""));

console.log(m);

.flat()

const u = [
  ["user1-", "user2-"],
  ["user3-", "user4-"]
];

console.log(u.flat());

To implement all three methods in one line of code, use the following:

let userGroup = [
  ['user1-', 'user2-', 'user3-'],
  ['user4-', 'user5-', 'user6-'],
  ['user7-', 'user8-', 'user9-']
];

   let grouped = userGroup.flat().map(item => item.replace('-', ''));
   console.log(grouped)

What is the best way to merge multiple arrays nested within another array while removing the final character from each word?

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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