是否可以向JavaScript函數發送可變數量的參數？可以從數組向JavaScript函數發送可變數量的參數嗎？var arr = ['a','b','c']var func = function(){
// debug
alert(arguments.length);
//
for(arg in arguments)
alert(arg);}func('a','b','c','d'); // prints 4 which is what I want, then 'a','b','c','d'func(arr); // prints 1, then 'Array'我最近寫了很多Python，能夠接受varargs并發送它們是一個很好的模式。G.def func(*args):
print len(args)
for i in args:
print i
func('a','b','c','d'); // prints 4 which is what I want, then 'a','b','c','d'func(*arr) // prints 4 which is what I want, then 'a','b','c','d'是否可以在JavaScript中發送待處理的數組如參數數組？
3 回答
慕的地6264312
TA貢獻1817條經驗 獲得超6個贊
var otherFunc = function() {
alert(arguments.length); // Outputs: 10}var myFunc = function() {
alert(arguments.length); // Outputs: 10
otherFunc.apply(this, arguments);}myFunc(1,2,3,4,5,6,7,8,9,10);
泛舟湖上清波郎朗
TA貢獻1818條經驗 獲得超3個贊
var arr = ['quick', 'brown', 'lazy'];var sprintf = function(str, ...args){
for (arg of args) {
str = str.replace(/%s/, arg);
}
return str;}sprintf.apply(null, ['The %s %s fox jumps over the %s dog.', ...arr]);
sprintf('The %s %s fox jumps over the %s dog.', 'slow', 'red', 'sleeping');sprintf('The %s %s fox jumps over the %s dog.', ...arr);
for...offor...in
添加回答
舉報
0/150
提交
取消