Distal common method

Disclaimer: This article is a blogger original article, shall not be reproduced without the bloggers allowed. https://blog.csdn.net/qq_36251118/article/details/87968265

function remove(arr,item){
    if(arr.length){
        var index = arr.indexOf(item);
        if(index>-1){
            return arr.splice(index,1)
        }
    }
}