javascript – jQuery $.each变量范围

在jQuery中有一个$.each循环的范围问题.如何在函数中获取一个全局变量来设置循环或至少传递一些东西呢？

var some_function = function() {

    // false by default
    var something = false;

    $.each(array,function(key,val) { 
       if (val == 'something')
       {
         // even if one item evaluates true I need to check outside of the loop
         something = true;
       }
    });

    if (something == true)
    {
       // do something else,but always false
    }
}

因为我需要评估数组中的所有项目,如果只有一项是真的,那么在$.each之外做一些额外的事情.

更新

$(document).ready(function () {
    something(); 
    $(':radio').trigger('change');
)};

好的,这是实际的代码.它在底部警告“假”,然后两次警告“你好”,好像它按相反顺序发出.

var something = function() {   

        var q_radios = {
            'radio1'        : 'radio1_selector','radio2'        : 'radio2_selector',};
        var show_me = false;

        $.each(q_radios,function(name,q_selector) {  
            $('input:radio[name=' + q_selector + ']').change(function() {  
                    show_me = true; 
                    alert('hello'); 
            }); 
        });   

        if (show_me == true)
        {
            alert('yes');
        }
        else
        {
            alert('false');
        }

};

解决方法

或多或少,正是你现在拥有的……你只需要将数据传递给函数(通过让它接受一个参数).见 a live example.

var some_function = function(array) { 

    // false by default
    var something = false;
    $.each(array,val) {
        if (val == 'something') {
            something = true;
        }
    });

    if (something == true) {
        alert("There was a something");
    } else {
        alert("There wasn't a something");
    }
};

some_function([1,2,3]);
some_function([1,"something",3]);
​