javascript for (i = 0; i < XXX.length; i++) -> 长度问题

Question

for (m = 0; m < troopsCount.length; m++) {

                //FM_log(7,"i="+i+" m="+m);
                //FM_log(7,"tipoTropaPrioritaria[m] = "+tipoTropaPrioritaria[m]);
                //FM_log(7,"troopsCount[m] = "+troopsCount[m]);
                //FM_log(7,"availableTroops[m] = "+availableTroops[m]);

                if ((tipoTropaPrioritaria[m] == null || tipoTropaPrioritaria[m] == "undefined")
|| (troopsCount[m] == null || troopsCount[m] == "undefined") ||
(availableTroops[m] == null || availableTroops[m] == "undefined")) 
                    return "alternaTropas(): ERRO - tipoTropaPrioritaria[m] || troopsCount[m] || availableTroops[m] null ou undefined";

                if ((parseInt(tipoTropaPrioritaria[m]) != 0) && (parseInt(troopsCount[m]) != 0)) {
                    naoServe = true;
                    break;
                }
                else {
                    if ((parseInt(availableTroops[m])) < (parseInt(troopsCount[m]))) {
                        naoServe = true;
                        break;
                    }
                    else if (m < troopsCount.length) {
                        naoServe = true;
                    }
                    else { //means m >= troopsCount.length
                        naoServe = false;
                    }
                }
}

我的问题是:最后的陈述

else { //means m >= troopsCount.length
    naoServe = false;
}

从那以后它会被评估吗

for (m = 0; m < troopsCount.length; m++)

???

Answer 1

不，它不会被执行，假设 m 和 troopsCount 没有在循环本身中被修改(在这个例子中他们似乎没有是)。

正如我相信您所指出的，如果开始时 m 大于或等于 troopsCount.length，循环的条件将阻止循环再次运行循环的。