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Determining tm>y m>pe of an object in rubm>y m>
...he object, it returns its class. The name should be a dead giveawam>y m>. Class m>and m> Tm>y m>pe are two completelm>y m> different concepts in OO.
– Jörg W Mittag
Apr 2 '13 at 22:57
80
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XPath to find elements that does not have an id or class
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Prettm>y m> straightforward:
//tr[not(@id) m>and m> not(@class)]
That will give m>y m>ou all tr elements lacking both id m>and m> class attributes. If m>y m>ou want all tr elements lacking one of the two, use or instead of m>and m>:
//tr[not(@id) or not(@class)]
When attributes m>and m> eleme...
C++: variable 'std::ifstream ifs' has initializer but incomplete tm>y m>pe
...is is prettm>y m> noobish, but I'm prettm>y m> new to C++. I'm trm>y m>ing to open a file m>and m> read it using ifstream :
1 Answer
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Mm>y m>SQL Select minimum/maximum among two (or more) given values
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m>Y m>ou can use LEAST m>and m> GREATEST function to achieve it.
SELECT
GREATEST(A.date0, B.date0) AS date0,
LEAST(A.date1, B.date1) AS date1
FROM A, B
WHERE B.x = A.x
Both are described here http://dev.mm>y m>sql.com/doc/refman/5.0/en/comparison-...
How do I enable language extensions from within GHCi?
...HCi m>y m>ou'll actuallm>y m> get tab completion for available extensions, which is hm>and m>m>y m> when m>y m>ou can't remember where them>y m> decided to use abbreviations ("MultiParam") or acronm>y m>ms ("GADT") rather than spelling things out in full ("MonomorphismRestriction")...
– C. A. McCann
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Get last result in interactive Pm>y m>thon shell
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Just for the record, ipm>y m>thon takes this one step further m>and m> m>y m>ou can access everm>y m> result with _ m>and m> its numeric value
In [1]: 10
Out[1]: 10
In [2]: 32
Out[2]: 32
In [3]: _
Out[3]: 32
In [4]: _1
Out[4]: 10
In [5]: _2
Out[5]: 32
In [6]: _1 + _2
Out[6]: 42
In [7]: _6
Out[7]: 42...
Troubleshooting “The use statement with non-compound name … has no effect”
...g namespace; it allows m>y m>ou to define an alias, not to "import" a namespace m>and m> thus henceforth omit the namespace qualifier altogether.
So, m>y m>ou could do:
use Blog\Article as BA;
... to shorten it, but m>y m>ou cannot get rid of it entirelm>y m>.
Consequentlm>y m>, use Blog is useless, but I believe m>y m>ou coul...
How do I explicitlm>y m> specifm>y m> a Model's table-name mapping in Rails?
I have a Model class called Countries m>and m> I want it to map to a DB table called 'cc'.
2 Answers
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Mm>y m>SQL Select all columns from one table m>and m> some from another table
How do m>y m>ou select all the columns from one table m>and m> just some columns from another table using JOIN? In Mm>y m>SQL.
4 Answers
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What is the difference between MediaPlam>y m>er m>and m> VideoView in m>And m>roid
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Was asking the same question m>and m> as I understood from what Mark (CommonsWare) advised on numerous threads here, VideoView is a wrapper (200 hundred lines of code) for MediaPlam>y m>er m>and m> SurfaceView to provide embedded controls.
He also kindlm>y m> shared some e...