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o.name = "Nicholas";
delete o.name;
alert(o.name);
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var iNum1 = 25; //25ÊÇ 00000........011001
var iNum2 = ~iNum1; // ת»»Îª11111........100110
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eval('var aa = 5');
alert(aa); // ->5
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var yy = "{a:'aa',b:'bb'}";
yy = eval('(' + yy + ')');
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