jQuery $.each variable Scope

Question

Having a scope issue problem with a $.each loop in jQuery . How can I get a global variable in a function to set in a loop or at least pass something out of it?

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
    }
}

Since I'm needing to evaluate all items in the array, and if only one is true , then do something additional, outside of the $.each .

Update

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

Ok, so this is the actual code. It's alerting 'false' at the bottom and then alerts 'hello' twice, as if it's going in reverse order.

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');
        }

};

Answer 1

More or less, exactly what you have now … you just need to pass the data into the function (by letting it accept an argument). See a live example .

var some_function = function(array) { 

    // false by default
    var something = false;
    $.each(array, function(key, 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]);
​

Answer 2

I recommend native Array iteration methods:

var something = array.some(function ( val ) {
   return val === 'something';
});

Here, something will be true if at least one array element has the value 'something' .