I typically utilize
array.forEach(element=>console.log(element)Consider the following snippet:
array=['1','2','3','4']
array.forEach(x=>x)//undefined
What I aim to obtain is :
'1'
'2'
'3'
'4'
Is this the best approach or is there another method that I am overlooking?
array.forEach() iterates through each value in the array, passing it to a callback function one at a time. This allows you to manipulate the values within the callback.
For demonstration, consider the following code snippet:
let array = [1,2,3,4];
let product = 1;
array.forEach(x => {
console.log(x);
// update the product variable
product *= x;
});
console.log(product);If you attempt to execute array.forEach(x, ...) in the console, you will see undefined because array.forEach() does not return a value.
Other array methods like .map(), .filter(), .reduce(), etc., do have return values. You can choose the appropriate method based on the specific operation you want to perform on the array.
For instance, the previous example could be re-written using .reduce():
let array = [1,2,3,4];
let product = array.reduce((total, x) => {
console.log(x);
return total * x;
}, 1);
console.log(product);Here is an example of using .map() to create a new array with each value squared:
let array = [1,2,3,4];
let product = array.map(x => {
return x ** 2;
}, 1);
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