字典()as3

时间:2011-11-03 18:57:25

标签: flash actionscript-3

我正在使用字典变量来匹配drop和drag exercice。

var dict = new Dictionary ();
dict[box_a]=s1;
dict[box_b]=s2;
dict[box_c]=s3;
dict[box_d]=s4;

问题1:最后我想检查box_a ==是否与s1等等......我该怎么做

for each( var item  in dict)
    {   item.removeEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
        item.removeEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
    if(item==????)
// what do i have to put instead of ???
    hits=hits+1;

问题2:我希望box_d也接受s3我该怎么做 如果我做  DICT [box_d] = S4;和dict [box_d] = s3;它不会工作,因为它与最后一个相等。 :( 谢谢!!

2 个答案:

答案 0 :(得分:5)

简介

Dictionary是键/值的集合,就像一个表:

+------+--------+
| key1 | value1 |
+------+--------+
| key2 | value2 |
+------+--------+
| key3 | value3 |
+------+--------+
| key4 | value4 |
+------+--------+

要访问这些值,您必须使用密钥,即:dict[key2]返回value2

答案1:

您无法直接访问密钥,购买时可以使用for ()语句访问密钥,因此:

for (var key:* in dict) {
    trace('dict[' + key + '] = ' + dict[key]);
}

将输出:

dict[key1] = value1
dict[key2] = value2
dict[key3] = value3
dict[key4] = value4

您正在使用for each ()声明。使用该特定语句,您将获得另一个结果,因为您正在遍历值而不是键,因此:

for each (var value:* in dict) {
    trace(value);
}

将输出:

value1
value2
value3
value4

因此,如果您想使用密钥检查某些内容,则必须使用for (key in dict)表单。

答案2:

我建议你使用这样的数组:

dict[box_a] = [s1];
dict[box_b] = [s2];
dict[box_c] = [s3];
dict[box_d] = [s3, s4];

然后将值作为数组访问并检查所有值:

for (var key:* in dict) {
    var values:Array = dict[key];
    for each (var value:* in values) {
        // do what you want with s1, s2, s3, etc
    }
}

答案 1 :(得分:0)

似乎只能检查基本类型的等式,用==替换===运算符不会改变任何内容:

        var dict:Dictionary = new Dictionary();
        dict['ololo1'] = { one : 1, two : '2' };
        dict[ { one : 1, two : '2' } ] = function(o:*):String { return o as String; };
        dict[function(o:*):String { return o as String; }] = 'ololo';
        dict['ololo2'] = 'ololo2';
        dict[{ one : 1, two : '2' }] = { one : 1, two : '2' };
        for (var key:* in dict) {
            trace(key, dict[key], key == dict[key]); 
        }
        trace('equal functions :', (function(o:*):String { return o as String; } === 
                                    function(o:*):String { return o as String; } ));
        trace('equal objects :', ({ one : 1, two : '2' } === 
                                  { one : 1, two : '2' } ));
        trace('equal functions :', (function(o:*):String { return o as String; } == 
                                    function(o:*):String { return o as String; } ));
        trace('equal objects :', ({ one : 1, two : '2' } == 
                                  { one : 1, two : '2' } ));

        var obj:Object = { one : 1, two : '2' };
        var obj1:Object = { one : 1, two : '2' };
        var fun:Function = function(o:*):String { return o as String; };
        var fun1:Function = function(o:*):String { return o as String; };
        trace(obj == { one : 1, two : '2' }, 
              obj == obj1,
              fun == function(o:*):String { return o as String; },
              fun == fun1);

输出

[object Object] [object Object] false
function Function() {} ololo false
[object Object] function Function() {} false
ololo2 ololo2 true
ololo1 [object Object] false
equal functions : false
equal objects : false
equal functions : false
equal objects : false
false false false false

但是,obj == obj会返回true;)