Or pass it around. To have it dereferenced elsewhere.

More seriously, I see that the OP is learning about a subject and discovering certain features. Now he's trying to understand what they really are to see if any of them can serve him right. So far, so fine: it's a learning model and I guess we all passed through it to some degree. OTOH unless one is really astonished about the particular feature under consideration, chances are that he will forget about it, but if the whole matter is turned around, i.e. if one has a task to accomplish and someone suggests a particular feature to do so, then most probably that will be the best way to really understand that particular feature's usefulness.

So I would recommend the OP not to get mad about trying to understand everything and soon, but rather to wait to have an actual problem at hand and to discover which features are useful to deal with it.

In reply to Re^4: what does the retval of can() do ? by blazar
in thread what does the retval of can() do ? by Anonymous Monk

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