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Quicksort vs heapsort
... Quicksort. Heapsort doesn't need more memory for another array to putting ordered data as is needed by Mergesort. So why do comercial applications stick with Quicksort? What Quicksort has that is so special over others implementations?
I've tested the algorithms myself and I've seen that Quicksort...
Can we pass parameters to a view in SQL?
...a table or a combination of tables. For example: a view may combine tables Order and Customer so you get a new "table" of rows from Order along with new columns containing the customer's name and the customer number (combination of tables). Or you might create a view that selects only unprocessed or...
PostgreSQL: Is it better to use multiple databases with one schema each, or one database with multip
...what about performance? And what about the code of my application (will be php and python)? so many schemas..
– Strae
Jul 20 '09 at 15:22
7
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What is the difference between CascadeType.REMOVE and orphanRemoval in JPA?
...eType.REMOVE and orphanRemoval=true.
For orphan removal:
If you invoke setOrders(null), the related Order entities will be removed in db automatically.
For remove cascade:
If you invoke setOrders(null), the related Order entities will NOT be removed in db automatically.
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Array.sort() doesn't sort numbers correctly [duplicate]
...aphical sort (e.g. convert objects to strings, and sort them in dictionary order), which is the default sort behavior in Javascript:
https://developer.mozilla.org/en/JavaScript/Reference/Global_Objects/Array/sort
array.sort([compareFunction])
Parameters
compareFunction
Specifies a function that de...
Cannot read configuration file due to insufficient permissions
...r have to grant access to Authenticated Users to those IIS root folders in order for IIS to work.
– Colin
Oct 24 '19 at 23:13
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What is the difference between bottom-up and top-down?
...nces: {Web: 1,2} {Literature: 5}
Recap
Dynamic programming is all about ordering your computations in a way that avoids recalculating duplicate work. You have a main problem (the root of your tree of subproblems), and subproblems (subtrees). The subproblems typically repeat and overlap.
For exam...
Simplest code for array intersection in javascript
...
@bplittle I just created an array from the set in order to remove duplicates, otherwise, using the array directly would result in returning duplicates. For example, if I used the array directly, intersect([1,2,2,4],[2,3]) would yield [2, 2].
– nbarbosa
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Understanding recursion [closed]
... right child, before we did that we recursed the left child.
In fact, the order in which we called the children, and added the current node's value didn't matter at all, because addition is commutative.
Now let's look at an operation where order does matter. We'll use a binary tree of nodes, but t...
scanf() leaves the new line char in the buffer
...scanf terminology) other than conversions, like the literal text in scanf("order = %d", &order); doesn't skip whitespace either. The literal order has to match the next character to be read.
So you probably want " order = %d" there if you want to skip a newline from the previous line but still...