5.5 KiB
title
title |
---|
Falsy Bouncer |
Remember to use
Read-Search-Ask
if you get stuck. Try to pair program and write your own code
Problem Explanation:
Remove all falsy values from an array.
Relevant Links
Hint: 1
Falsy is something which evaluates to FALSE. There are only six falsy values in JavaScript: undefined, null, NaN, 0, "" (empty string), and false of course.
try to solve the problem now
Hint: 2
We need to make sure we have all the falsy values to compare, we can know it, maybe with a function with all the falsy values...
try to solve the problem now
Hint: 3
Then we need to add a filter()
with the falsy values function...
try to solve the problem now
Spoiler Alert!
Solution ahead!
Basic Code Solution:
function bouncer(arr) {
let newArray = [];
for (var i = 0; i < arr.length; i++){
if (arr[i])
newArray.push(arr[i]);
}
return newArray;
}
Code Explanation:
We create a new empty array. We use a for cycle to iterate over all elements of the provided array (arr). We use the if statement to check if the current element is truthy or falsy. If the element is truthy, we push it to the new array (newArray). This result in the new array (newArray) containing only truthy elements. We return the new array (newArray).
Relevant Links
Advanced Code Solution:
function bouncer(arr) {
return arr.filter(Boolean);
}
Code Explanation:
The Array.prototype.filter
method expects a function that returns a Boolean
value which takes a single argument and returns true
for truthy value or false
for falsy value. Hence we pass the built-in Boolean
function.
Relevant Links
Credits:
If you found this page useful, you can give thanks by copying and pasting this on the main chat: