I have this const:
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
and I'm trying to return the first letter of each word. What I have:
const firstLetter = animals.map(animal => {
return_
Within the handler of the function map destructure the string for getting the first letter and use it as a result for each index.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const result = animals.map(([letter]) => letter);
console.log(result);.as-console-wrapper { max-height: 100% !important; top: 0; }Do you want to return the first letter of each word of an array (question says 'string').
You're almost there! You could do:
animals.map(a => a[0]);
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const firstLetter = [];
for(var i = 0; i < animals.length; i++) {
firstLetter.push(animals[i][0]);
}
console.log(firstLetter);If the animals[i][0] doesn't work, you can always use animals[i].charAt(0). My solution is a more basic solution, but it is better because it doesn't use built-in functions.
.map() the animals Array. On each word .split('') it into letters and then .shift() to get the first letter.
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
let greeting = animals.map(animal => animal.split('').shift());
console.log(JSON.stringify(greeting));Use map to get the first letter of each word and use join to combine them into a string:
const animals = ['Hen', 'elephant', 'llama', 'leopard', 'ostrich', 'Whale', 'octopus', 'rabbit', 'lion', 'dog'];
const firstLetters = animals.map(a => a[0]).join('');
console.log(firstLetters);write "firstLetter" function and code will be:
const firstLetter = (word) => word[0]
const result = animals.map(firstLetter);
