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Static fields on a null reference in Java
...I think this is obvious: it is reasonable to not throw any exceptions when calling on a null reference because it doesn't matter since the method is static.
– Malcolm
Jul 20 '12 at 17:01
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PDO closing connection
...that holds the object. If you don't do this
explicitly, PHP will automatically close the connection when your
script ends.
Note that if you initialise the PDO object as a persistent connection it will not automatically close the connection.
...
How to get hosting Activity from a view?
...tContext() may not always represent an Activity object if your View is not called from an Activity context. E.g. it doesn't work for custom views.
– Tohid
Aug 3 '17 at 20:17
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What is the volatile keyword useful for?
...
volatile has semantics for memory visibility. Basically, the value of a volatile field becomes visible to all readers (other threads in particular) after a write operation completes on it. Without volatile, readers could see some non-updated value.
To answer your question: ...
How do you import classes in JSP?
...
Call me an heretic but I very often use Lists (and plenty of other POJO) in JSPs. This is of course strictly limited to proof of concepts and small do-it-all JSPs that are meant for one very specific and temporary purposes. I...
Map function in MATLAB?
...ons are often not necessary if you take advantage of vectorization, specifically using element-wise arithmetic operators. For the example you gave, a vectorized solution would be:
>> x = 1:10;
>> y = x.^2
y =
1 4 9 16 25 36 49 64 81 100
Some operation...
How to filter object array based on attributes?
...; i++) {
if (i in this) {
var val = this[i];
if (fun.call(thisp, val, i, this))
res.push(val);
}
}
return res;
};
}
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What is the difference between RegExp’s exec() function and String’s match() function?
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@yeyo: More specifically, it has to be the same regular expression object. A literal doesn’t accomplish that.
– Ry-♦
Jan 27 '15 at 5:12
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How to create a new (and empty!) “root” branch?
...Signed-off-by: brian m. carlson
Reviewed-by: Derrick Stolee
When we call init_checkout_metadata in reset_tree, we want to pass the object ID of the commit in question so that it can be passed to filters, or if there is no commit, the tree.
We anticipated this latter case, which can occ...
How can I generate random alphanumeric strings?
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While this technically answers the question, it's output is very misleading. Generating 8 random characters sounds like there can be very many results, whereas this at best produces 2 billion different results. And in practice even fewer. You...