Iterate through an array without using numerical indices in TypeScript

Question

Iterate through an array without using numerical indices in TypeScript

Here is an array named lastID containing values:

[valuePath00: true, valuePath01: false, valuePath14: true] ...

I am looking for a way to iterate over this array using a for loop. Can you please help?

javascript typescript

Answer 1

Answer №1

Assuming you meant an Object instead of an Array. It's worth noting that arrays typically use numeric indices, but there may be exceptions.

const lastId = {
  valuePath00: true,
  valuePath01: false,
  valuePath14: true
};

// Utilizing a for loop
for (let i in lastId) {
  console.log(lastId[i]);
}

// Using Object.keys() and Array.prototype.map()
Object.keys(lastId).map(key => {
  console.log(lastId[key]);
});

Answer 2

Assuming you meant an Object instead of an Array. It's worth noting that arrays typically use numeric indices, but there may be exceptions.

const lastId = {
  valuePath00: true,
  valuePath01: false,
  valuePath14: true
};

// Utilizing a for loop
for (let i in lastId) {
  console.log(lastId[i]);
}

// Using Object.keys() and Array.prototype.map()
Object.keys(lastId).map(key => {
  console.log(lastId[key]);
});

Answer 3

Answer №2

Have you considered utilizing a forEach loop instead?

lastID.forEach(item => {
  // perform an action with each item
});

If you prefer to use a for loop, make sure to include an index in your code. Here's an example:

for (let i = 0; i < lastID.length; i++) {
  console.log(lastID[i]);
}

Answer 4

Have you considered utilizing a forEach loop instead?

lastID.forEach(item => {
  // perform an action with each item
});

If you prefer to use a for loop, make sure to include an index in your code. Here's an example:

for (let i = 0; i < lastID.length; i++) {
  console.log(lastID[i]);
}

Iterate through an array without using numerical indices in TypeScript

Answer №1

Answer №2

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