I am trying to delete all elements that matches @b.com, but it returns an empty array even if I remove the !, which leads me to think, I am doing something competently wrong.
Can someone explain what I am doing wrong?
const arr = ['a@a.com', 'b@b.com', 'c@c.com'];
if (arr !== null && arr.length > 0) {
const arr2 = arr.filter(e => {
!e.match(/@b.com/);
});
console.log(arr2);
}You forgot return statement:
const arr = ['a@a.com', 'b@b.com', 'c@c.com'];
if (arr !== null && arr.length > 0) {
const arr2 = arr.filter(e => {
return !e.match(/@b.com/);
});
console.log(arr2);
}One more thing, if you don't match by regex, you can just use string.includes:
const arr = ['a@a.com', 'b@b.com', 'c@c.com'];
if (arr !== null && arr.length > 0) {
const arr2 = arr.filter(e => {
return !e.includes('@b.com');
});
console.log(arr2);
}You forget the return statement.
const arr = ['a@a.com', 'b@b.com', 'c@c.com'];
const arr2 = arr?.length ? arr.filter((e) => !e.match(/@b.com/)) : [];
console.log(arr2);