How to do a check if an Array is empty?

Questions & Answers
1

I have a basic melee system implemented with a large cube trigger collider attached to the front of my player that gets enabled briefly on Input Fire1. My problem was, I only wanted it to be able to hit one person (it was calling the ApplyDamage function on all enemies in the cube in front of the player, even though I set it to deactivate itself after sending the ApplyDamage message in OnTriggerEnter).

So I came up with a simple solution I was rather proud of :) I created an Array called enemies, and add the enemy GameObject to the Array OnTriggerEnter. The in LateUpdate, I check if enemies[0] is null, and if not, call the ApplyDamage function on enemies[0] and clear the Array.

However, it throws an error when I check if enemies[0] == null, saying that "ArgumentOutOfRangeException: Index is less than 0 or more than or equal to the list count." Is there another way I can check if the enemies Array is empty?

Here's my code:

private var enemies = new Array();

function LateUpdate(){

    if(enemies[0] != null){
        enemies[0].GetComponent(EnemyStatus).ApplyDamage();
        enemies.Clear();
    }

}

function OnTriggerEnter (other : Collider) {

    if(other.gameObject.tag == "Enemy"){
        enemies.Add(other.gameObject);
        gameObject.active = false;
    }

}
2

Try this:

if(enemies.length > 0){
        enemies[0].GetComponent(EnemyStatus).ApplyDamage();
        enemies.Clear();
}
3

@Anton S Wouldnt it be …

if(enemies.length > -1){
}

as enemies[0] is a valid index.
-Mince-