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In object-oriented programming, a metaclass is a class whose instances are classes. Just as an ordinary class defines the behavior of certain objects, 阅读全文
posted @ 2018-01-20 23:14
zzfx
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In some languages, classes are only a compile-time feature (new classes cannot be declared at runtime), while in other languages classes are first-cla 阅读全文
posted @ 2018-01-20 22:45
zzfx
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eval is a function which evaluates a string as though it were an expression and returns a result; in others, it executes multiple lines of code as tho 阅读全文
posted @ 2018-01-20 22:11
zzfx
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