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How to generate a range of numbers between two numbers?
...n be extended to create hundreds of thousands of rows and beyond).
SELECT ones.n + 10*tens.n + 100*hundreds.n + 1000*thousands.n
FROM (VALUES(0),(1),(2),(3),(4),(5),(6),(7),(8),(9)) ones(n),
(VALUES(0),(1),(2),(3),(4),(5),(6),(7),(8),(9)) tens(n),
(VALUES(0),(1),(2),(3),(4),(5),(6),(7),(8...
How can I SELECT rows with MAX(Column value), DISTINCT by another column in SQL?
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With SQLite, the first one is much much slower than La Voie's version when there is no index on the matched column (i.e. "home"). (Tested with 24k rows resulting in 13k rows)
– Thomas Tempelmann
Apr 30 '15 at ...
Java concurrency: Countdown latch vs Cyclic barrier
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One major difference is that CyclicBarrier takes an (optional) Runnable task which is run once the common barrier condition is met.
It also allows you to get the number of clients waiting at the barrier and the number requ...
How to print third column to last column?
...how an alternative way of doing the task. Wouldn't you be thankful if someone showed you a simpler and quicker way to do the same task? Maybe the poster thought awk is the only way to do this because of number of 'not incorrect, but certainly improvable upon' answers to other questions?
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What is the difference between a generative and a discriminative algorithm?
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When staring at the matrices observe that in the first one, all entries sum up to 1.0, while in the second one each row sums up to one. This will speed the enlightenment (and reduce confusion)
– Maxim Khesin
Aug 20 '13 at 17:58
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Remove element of a regular array
...equires two array copies and a shift of everything after index rather than one selective array copy.
– Martin Brown
Jan 19 '09 at 19:25
2
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Quicksort: Choosing the pivot
When implementing Quicksort, one of the things you have to do is to choose a pivot. But when I look at pseudocode like the one below, it is not clear how I should choose the pivot. First element of list? Something else?
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How to remove all listeners in an element? [duplicate]
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I think that the fastest way to do this is to just clone the node, which will remove all event listeners:
var old_element = document.getElementById("btn");
var new_element = old_element.cloneNode(true);
old_element.parentNode.replaceChild(new_element, old_element);
Just be c...
Why does the order in which libraries are linked sometimes cause errors in GCC?
...rnatively, you can specify the libraries multiple times, so each is before one another: -la -lb -la.
Linking to dynamic libraries
$ export LD_LIBRARY_PATH=. # not needed if libs go to /usr/lib etc
$ g++ -fpic -shared d.cpp -o libd.so
$ g++ -fpic -shared b.cpp -L. -ld -o libb.so # specifies its dep...
Does Python support short-circuiting?
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>>> def fun(i):
... print "executed"
... return i
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One can observe the Python's short-circuiting behavior of and, or operators in the following example:
>>> fun(1)
executed
1
>>> 1 or fun(1) # due to short-circuiting "executed" not printed
1
>>>...