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How Scalable is SQLite? [closed]
...g edits and realize that there are ways of speeding up SQLite to have acceptable performance.
– Kyle Cronin
Jul 23 '09 at 17:03
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What is better, adjacency lists or adjacency matrices for graph problems in C++?
...e can improve the space-efficiency of the adjacency matrix by using a hash table where the keys are pairs of vertices (undirected only).
Iteration and lookup
Adjacency lists are a compact way of representing only existing edges. However, this comes at the cost of possibly slow lookup of specific e...
Detecting when the 'back' button is pressed on a navbar
...s run through an example. Say you have three view controllers:
ListVC: A table view of things
DetailVC: Details about a thing
SettingsVC: Some options for a thing
Lets follow the calls on the detailVC as you go from the listVC to settingsVC and back to listVC
List > Detail (push detailVC) De...
Returning 'IList' vs 'ICollection' vs 'Collection'
...of the items and this order could change at any time, if the internal hash table is re-organized.
– Olivier Jacot-Descombes
Jan 2 '15 at 17:07
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“Keep Me Logged In” - the best approach
...in, generate a large (128 to 256 bit) random token. Add that to a database table which maps the token to the userid, and then send it to the client in the cookie.
What if the attacker guesses the random token of another user?
Well, let's do some math here. We're generating a 128 bit random token....
Finding all cycles in a directed graph
...ind a valid route, it depends on your data structure. For me it was a sql table full of valid route possibilities so I had to build a query to get the valid destinations given a source.
Problem 2)
Push each node as you find them into a collection as you get them, this means that you can see if you...
Generating a UUID in Postgres for Insert statement?
...oint of my comment, though. Your original answer implies that v4 is not suitable for large datasets due to a higher probability of collision than v1. This is misleading and possibly false, though it is hard to calculate the collision probability for v1 because it is so implementation-dependent.
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Image comparison - fast algorithm
I'm looking to create a base table of images and then compare any new images against that to determine if the new image is an exact (or close) duplicate of the base.
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How does this giant regex work?
...PHP to see the corresponding output, or look up each character in an ASCII table
– Michael Mrozek
Jul 25 '10 at 6:14
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HTML minification? [closed]
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Perhaps try HTML Compressor, here's a before and after table showing what it can do (including for Stack Overflow itself):
It features many selections for optimizing your pages up to and including script minimizing (ompressor, Google Closure Compiler, your own compressor) wher...