comment vérifier un tableau .. dans un tableau? jquery

Question

Je voudrais savoir comment vérifier un tableau qui contient plusieurs variables. Quelque chose comme ça. Je peux expliquer mieux avec le code affiché:

// Ignore the words in here, they are just there to explan. 
var $array = [ 
    alpha = { 
    name : $('.a'), 
    date : $('.b'), 
    street: $('.c') 
    }, 
    beta = { 
    name : $('.x'), 
    date : $('.y'), 
    street: $('.z') 
    }  
]; 

/* So now I got this arrays.. withing an array? is that correct? 
* or what is this called? 
* and now I want to check each object's length, if its 0 -> return false and 
* throw out an error, if >= 1 go on and check the next. */ 

// Check if all needed elements for the toggle to work are existent 
$.each($array, function(key, value) { 
    if (!value.length) { 
    alert("Could not find "+ '"' + value.selector +'"!') 
    return false 
    }; 
}); 
// Well obviously this doesnt work.. 

Merci à l'avance!

Answer 1

Vous pouvez passer en boucle les noms des propriétés d'un object avec une boucle for (... in ...):

/* since the array isn't a jQuery object, don't prefix the name with `$` */ 
var things = [ 
    /* array elements have integer, not string, indices. In any case, 
     "alpha = ..." is the wrong syntax to set properties. What it 
     does is set a variable named "alpha". 
    */ 
    {...}, 
    {...}, 
]; 

$.each(things, function(idx, item) { 
    for (p in item) { 
    if (! item[p].length) { 
     /* alerts are disruptive; use other means of informing 
     the user or developer. 
     */ 
     //alert("Could not find "+ '"' + value.selector +'"!') 
     return false; 
    } /* blocks don't need semicolon separators */ 
    } 
}); 

Voir aussi « For .. in loop? »