What is the process for converting a string into a map?

Question

What is the process for converting a string into a map?

Trying to transform a string from this format:

string = "John:31,Miranda:28"

To this format:

obj = { "John" => 31, "Miranda" => 28 }

I attempted to do the following:

const class = new Map();
array = string.split(",");

However, after splitting the string, I end up with something like this:

["John:31", "Miranda:28"]

I am unsure of how to convert this array into an object format (using ":" as an arrow). Is there a way to bypass using the array as an intermediary? Any suggestions would be greatly appreciated. Thank you!

javascript arrays object

Answer 1

Answer №1

One way to achieve this is by utilizing the split method to split the string by comma, followed by using the map function to further split the resulting strings by colon. You can then feed the array of arrays into the Map constructor.

If your intention is to have the map keyed by names:

const string = "John:31,Miranda:28"
const map = new Map(string.split(",").map(entry => entry.split(":")));
console.log(map.get("John")); // "31" (a string)

If you prefer the numbers to be actual numbers instead of strings, you will need to convert them accordingly:

const string = "John:31,Miranda:28"
const map = new Map(string.split(",").map(entry => {
    const parts = entry.split(":");
    parts[1] = +parts[1];
    return parts;
}));
console.log(map.get("John")); // 31 (a number)

You can refer to this answer for more insights on converting from string to number in JavaScript.

In case you want the map to be keyed by value instead (although it's not likely), you just need to reverse the order of entries within the inner arrays:

const string = "John:31,Miranda:28"
const map = new Map(string.split(",").map(entry => {
    const [name, num] = entry.split(":");
    return [num, name];
}));
console.log(map.get("31")); // John

Answer 2

One way to achieve this is by utilizing the split method to split the string by comma, followed by using the map function to further split the resulting strings by colon. You can then feed the array of arrays into the Map constructor.

If your intention is to have the map keyed by names:

const string = "John:31,Miranda:28"
const map = new Map(string.split(",").map(entry => entry.split(":")));
console.log(map.get("John")); // "31" (a string)

If you prefer the numbers to be actual numbers instead of strings, you will need to convert them accordingly:

const string = "John:31,Miranda:28"
const map = new Map(string.split(",").map(entry => {
    const parts = entry.split(":");
    parts[1] = +parts[1];
    return parts;
}));
console.log(map.get("John")); // 31 (a number)

You can refer to this answer for more insights on converting from string to number in JavaScript.

In case you want the map to be keyed by value instead (although it's not likely), you just need to reverse the order of entries within the inner arrays:

const string = "John:31,Miranda:28"
const map = new Map(string.split(",").map(entry => {
    const [name, num] = entry.split(":");
    return [num, name];
}));
console.log(map.get("31")); // John

Answer 3

Answer №2

To start, divide the information based on commas and then iterate through it by separating with colons to create an object.

const data = "John:31,Miranda:28";
const myObj = data.split(',').reduce((obj, part) => {
  const pieces = part.split(':');
  obj[pieces[0]] = pieces[1];
  return obj;
}, {});

Answer 4

To start, divide the information based on commas and then iterate through it by separating with colons to create an object.

const data = "John:31,Miranda:28";
const myObj = data.split(',').reduce((obj, part) => {
  const pieces = part.split(':');
  obj[pieces[0]] = pieces[1];
  return obj;
}, {});

Answer 5

Answer №3

If you're looking to achieve a similar outcome, consider the following approach:

let information = "John:31,Miranda:28";

let splitInfo = information.split(',');

let finalResult = splitInfo.reduce((newData, individual) => {
  const [person, age] = individual.split(':');
  return {
    ...newData,
    [person]: parseInt(age)
  };
}, {});

console.log(finalResult);

Answer 6

If you're looking to achieve a similar outcome, consider the following approach:

let information = "John:31,Miranda:28";

let splitInfo = information.split(',');

let finalResult = splitInfo.reduce((newData, individual) => {
  const [person, age] = individual.split(':');
  return {
    ...newData,
    [person]: parseInt(age)
  };
}, {});

console.log(finalResult);

Answer 7

Answer №4

Here's a helpful tip:

To start, split the string by commas and then by colons.
Next, combine the results into a map.

const test = "John:31,Miranda:28"; 
console.log(test);
const obj = test.split(/,/).map(item => item.split(/:/));
console.log(obj);
const _map = new Map(obj);
console.log(_map);
console.log(_map.get("John"))

https://i.sstatic.net/JzpG4.png

Answer 8

Here's a helpful tip:

To start, split the string by commas and then by colons.
Next, combine the results into a map.

const test = "John:31,Miranda:28"; 
console.log(test);
const obj = test.split(/,/).map(item => item.split(/:/));
console.log(obj);
const _map = new Map(obj);
console.log(_map);
console.log(_map.get("John"))

https://i.sstatic.net/JzpG4.png

What is the process for converting a string into a map?

Answer №1

Answer №2

Answer №3

Answer №4

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