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How can we match a^n b^n with Java regex?
...lowly constructed. In this aspect, hopefully this answer will contain much more than just another neat regex pattern. Hopefully readers will also learn how to "think in regex", and how to put various constructs harmoniously together, so they can derive more patterns on their own in the future.
The l...
What is a “thread” (really)?
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+1. A thread isn't anything more "concrete" than a set of register values.
– Greg Hewgill
Mar 5 '11 at 5:24
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Pacman: how do the eyes find their way back to the monster hole?
...cept the one you just came from;
picking one which is nearest the goal. If more than one is equally near the goal, pick the first valid direction in this order: up, left, down, right.
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When and why are database joins expensive?
...ucing the cost of joins involving string comparisons. Not only will vastly more fit in cache, there's a lot less disk reading to do.
Moreover, a good optimiser will choose the most restrictive condition and apply it before it performs a join, very effectively leveraging the high selectivity of joi...
When is JavaScript's eval() not evil?
...il", as used by programming language people, usually means "dangerous", or more precisely "able to cause lots of harm with a simple-looking command". So, when is it OK to use something dangerous? When you know what the danger is, and when you're taking the appropriate precautions.
To the point, let...
How to select html nodes by ID with jquery when the id contains a dot?
...he correct way to select a literal ‘.’ in CSS is to escape it: “#id\.moreid”. This used to cause trouble in some older browsers (in particular IE5.x), but all modern desktop browsers support it.
The same method does seem to work in jQuery 1.3.2, though I haven't tested it thoroughly; quick...
How to compute the sum and average of elements in an array?
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In which scenario do I use a particular STL container?
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@shuttle87 not just that size will never vary, but more importantly that size is determined at compile time and will never vary.
– YoungJohn
Jul 24 '15 at 20:51
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What is the maximum value for an int32?
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Is 161803398 A 'Special' Number? Inside of Math.Random()
... answer is 'Because of Math', but I was hoping someone could give a little more insight at a basic level...
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