after

let count = 0; // after(3,log)('hi')这种用法count = 0只能放在这里
function after(times,callback){
    //var log = after(3,log)
    //log(1) 这种用法，count = 0只能放在这里核下面都一样
    let count = 0; 
    return function(...args){
        count++
        if(count === times) {
            callback.apply(this,args)
        }
    }
}
function log(info){
    console.log(info);
    
}
var log = after(3,log)
log(1)
log(2)
log(3) // 执行后才会有输出3
// after(3,log)('hi')
// after(3,log)('hi')
// after(3,log)('hi')