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What is 'Pattern Matching' in functional languages?
...//invented pattern matching in JavaScript
In foo2, it expects a to be an array, it breaks apart the second argument, expecting an object with two props (prop1,prop2) and assigns the values of those properties to variables d and e, and then expects the third argument to be 35.
Unlike in JavaScript...
Questions every good .NET developer should be able to answer? [closed]
...ses all nodes of the tree.
Write a method to perform a binary search on an array without using built-in methods.
Draw a database schema for a blog. Each user only has one blog, each blog has many categories, each category has many posts, and each post can belong to more than one category. Ask your a...
What is memory fragmentation?
...ng memory for a lot of small objects, pre-allocate memory for a contiguous array of those smaller objects. Sometimes being a little wasteful when allocating memory can go along way for performance and may save you the trouble of having to deal with memory fragmentation.
...
Stopping scripters from slamming your website
... way to prevent this behavior by external agents.
You could employ a vast array of technology to analyze incoming requests and heuristically attempt to determine who is and isn't human...but it would fail. Eventually, if not immediately.
The only viable long-term solution is to change the game so ...
Would it be beneficial to begin using instancetype instead of id?
...ant to maintain source compatibility with (for instance) assigning a new NSArray to a NSString without a cast.
– Steven Fisher
Mar 6 '13 at 17:19
4
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Image comparison - fast algorithm
...ly 8 bytes.
For example, if you have 1 million images it would require an array of 1 million 64-bit hash values (8 MB). On some CPUs this fits in the L2/L3 cache! In practical usage I have seen a corei7 compare at over 1 Giga-hamm/sec, it is only a question of memory bandwidth to the CPU. A 1 Billi...
Understanding the Use of ColorMatrix and ColorMatrixColorFilter to Modify a Drawable's Hue
...cted void onDraw(Canvas canvas) {
// The matrix is stored in a single array, and its treated as follows: [ a, b, c, d, e, f, g, h, i, j, k, l, m, n, o, p, q, r, s, t ]
// When applied to a color [r, g, b, a], the resulting color is computed as (after clamping) ;
// R' = a*R + b*G + c*...
What's the best way of scraping data from a website? [closed]
...ing a bad choice, but with the right libraries it's not too bad. Regex and array/sting manipulation is clumsy but on the plus side it's fast and everywhere.
– pguardiario
Mar 5 '14 at 1:01
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What are the differences between the threading and multiprocessing modules?
...processes generally requires putting it into low-level formats like Value, Array, and ctypes types.
Processes are not subject to the GIL.
On some platforms (mainly Windows), processes are much more expensive to create and destroy.
There are some extra restrictions on processes, some of which are di...
How well is Unicode supported in C++11?
...., char objects. However, unlike a wide string literal, which is always an array of wchar_t objects, a "wide string" in this context is not necessarily a string of wchar_t objects. In fact, the standard never explicitly defines what a "wide string" means, so we're left to guess the meaning from usag...