JS的for循环中的var 和 let详解

Java.perform(function () {
    let Utils = Java.use("com.xxx.xxx.Utils");
    var methods = Utils.class.getDeclaredMethods();
    for (let i = 0; i < methods.length; i++) {
        let methodName = methods[i].getName();
        console.log('methodName: ', methodName)
        var overloadsArray = Utils[methodName].overloads;
        for (let j = 0; j < overloadsArray.length; j++) {
            overloadsArray[j].implementation = function () {
                var params = '';
                for (let k = 0; k < arguments.length; k++) {
                    params += arguments[k] + ' ';
                }
                console.log(`utils.${methodName} is called! params is: `, params);
                console.log(this);
                return this[methodName].apply(this, arguments)
            }
        }
    }
})