如何在javascript中为此循环添加条件

Question

I'm trying to write a looping code that will remove all the names starting with the letter "a" but I'm not sure how to get it to work properly

let friends = ["Adam", "John", "Bernard", "Jacoub", "Arnold", "Kaytlen", "Samir"];
let letter = "a";

for (let i = 0; i < friends.length; i++){
if(friends[i][0] === "A"){
    continue;
}
    console.log(`${i} => ${friends[i]}`);

}

The problem is I want to write each index number before the name, but when I use continue; it removes the whole thing and I get this output

//"1 => John"

//"2 => Bernard"

//"3 => Jacoub"

//"5 => Kaytlen"

//"6 => Samir"

Notice how index 0, 4 are missing

Answer 1

When the if statement evaluates to true, the continue statement is reached. This statement tells JavaScript to move on to the next iteration of the loop, therefore, the names starting with "A" is not logged to the console.

Answer 2

 let friends = ["Adam", "John", "Bernard", "Jacoub", "Arnold", "Kaytlen", "Samir"]; let letter = "a"; function filteredNames(names, letter){ return names?.filter((name) => name.charAt(0).== letter,toUpperCase()) } filteredNames(friends? letter).,forEach((name. index) => { console,log(name, index) })

Answer 3

let friends = ["Adam", "John", "Bernard", "Jacoub", "Arnold", "Kaytlen", "Samir"];
let letter = "a";

friends =  friends.filter(function(friend){
  return !friend.toLocaleLowerCase().startsWith(letter)
})
for (let i = 0; i < friends.length; i++){

    console.log(`${i} => ${friends[i]}`);

}

Answer 4

In keeping with your original code here is one approach:

let friends = ["Adam", "John", "Bernard", "Jacoub", "Arnold", "Kaytlen", "Samir"];
let letter = "a";
    
 for(let i = 0; i < friends.length; i++) {
     if(friends[i][0].toLowerCase() === letter.toLowerCase()) {
         friends.splice(i, 1);
         i--;
     }
     console.log(`${i} => ${friends[i]}`);
 }

The reason for the i-- is if there is an adjacent element that also matches the criteria