JavaScript - 数组 - 从数组中删除元素

Question

I've looked up arrays and how they work, looked at a lot of other stackoverflow questions on this same topic but the answer still doesn't remain clear. How can I remove a specified element from an array?

I've tried:

array.splice(5);
array.splice(i, 5);
delete array[5]; //doesn't actually delete - I know

1 of 2 things happen every time. 1. The whole array is deleted with either of the first 2 methods mentioned above. or 2. Everything before/after the element specified is removed.

For example, I had an array that contained a Clash Royale deck:

var deck = ["Barbarians", "Goblin_Barrel", "Inferno_Tower", "Fireball", "Zap", "Hog_Rider", "Spear_Goblins", "Minion_Horde"];

Then if I wanted to remove, lets say, Fireball, then I did:

deck.splice("Fireball");

And the array now looked like this:

deck = [];

So, to restate my question. How do I remove a specified, and only the specified, element from an array?

Answer 1

Check the usage for splice in a JavaScript reference . You need to pass in the index of the thing to delete, then how many things to delete.

Answer 2

First find the index of element then remove it using splice.

Find Index of element

var index = deck.indexOf("Fireball"); 

Now remove element using splice.

if (index > -1) {
   deck.splice(index,1);
 }

if duplicate values exists then

for(ind = 0 ; ind <deck.length; ind++){
    if(deck[ind]=="Fireball"){
       deck.splice(ind--,1); 
     }
}