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Odd behavior when Java converts int to byte?
...t to represent it as an int (32 bits) you simply copy the 1 to the left 24 times.
Now, one way to read a negative two's complement number is to start with the least significant bit, move left until you find the first 1, then invert every bit afterwards. The resulting number is the positive version ...
SQL Server Insert if not exists
...@Marc Durdin for pointing)
Note that under high load, this will still sometimes fail, because a second connection can pass the IF NOT EXISTS test before the first connection executes the INSERT, i.e. a race condition. See stackoverflow.com/a/3791506/1836776 for a good answer on why even wrapping in...
How is AngularJS different from jQuery
... jQuery can do the same (independence), but, indeed, AngularJS, as several times mentioned within the above lines, has independence in the most excellent possible structurally MVC-Based way.
A last note is that, there is no war of Names, since it is far disturbing to be biased, or subjective. jQue...
Which comment style should I use in batch files?
... very inexplicable errors (in this case "\Microsoft was unexpected at this time"). You don't even need | or > in your expression. A :: is not a real comment, REM is, though.
– Abel
Sep 28 '17 at 1:06
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When monkey patching an instance method, can you call the overridden method from the new implementat
... also do stuff before and after calling super, you can call super multiple times, and both retrieve and manipulate super’s return value, making prepend more powerful than method combinators.
class Foo
def bar:before
# will always run before bar, when bar is called
end
end
# is the same a...
What and When to use Tuple? [duplicate]
...s you supply one value to the method that the thread executes at
startup time. If you supply a Tuple<T1, T2, T3> object as the method
argument, you can supply the thread’s startup routine with three
items of data.
...
Creating a range of dates in Python
...
Marginally better...
base = datetime.datetime.today()
date_list = [base - datetime.timedelta(days=x) for x in range(numdays)]
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Factors in R: more than an annoyance?
... levels. My brain just cannot remember them and I have to relearn it every time I use it. Recoding should just be a lot easier than it is.
R's string functions are quite easy and logical to use. So when manipulating I generally prefer characters over factors.
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Bulk Insertion in Laravel using eloquent ORM
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@CanVural what should we do to update/create timestamps also?
– Milan Maharjan
Jul 21 '15 at 11:28
3
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List all indexes on ElasticSearch server?
... @IvanYurchenko I've implemented my elasticsearch plugin long time ago. Very possible that the APIs have changed since and it doesn't work anymore.. Best is to use the '_aliases' command. It will also provide information about all indices in elasticsearch.
– pawelo...