计算和比较数组中的元素

Question

playerArray has seven elements. I want to return true if whatever array is passed into hasEnoughPlayers is at least 7 and false if it isn't.

I tried using playerArray.length - 1 . Still doesn't work.

var hasEnoughPlayers = function(playerArray){
    for (var i = 0; i < (playerArray.length - 1); i++){
        if ((playerArray.length - 1) == 7){
           return false;
        }
        else {
            return true;

        }
    }
};

I keep getting a false or some error message. Here is the code tested with a team array.

var hasEnoughPlayers = function(playerArray){
            return playerArray.length  === 7;
};

var team = ["Oliver Wood", "Angelina Johnson", "Katie Bell", "Alicia Spinnet", "George Weasley", "Fred Weasley", "Harry Potter"];
console.log(hasEnoughPlayers(team));

Answer 1

Your doing i < (playerArray.length - 1) instead of i < (playerArray.length). Since your asking for less than and not less than or equal too, it's not gonna return true so replace i < (playerArray.length - 1) with i < (playerArray.length)

Answer 2

You don't need a loop at all if I am understanding the question correctly. You can simply check the length

var hasEnoughPlayers = function(playerArray){
    return playerArray.length >= 7
}

Here is a full working example...

 var hasEnoughPlayers = function(playerArray){ return playerArray.length === 7; }; var team = [ "Oliver Wood", "Angelina Johnson", "Katie Bell", "Alicia Spinnet", "George Weasley", "Fred Weasley", "Harry Potter" ]; alert(hasEnoughPlayers(team));