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Floating point vs integer calculations on modern hardware
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This "benchmark" has no data parallelism for out-of-order execution, because every operation is done with the same accumulator (v). On recent Intel designs, divide isn't pipelined at all (divss/divps has 10-14 cycle latency, and the same reciprocal throughput). mulss however...
What is the purpose of willSet and didSet in Swift?
...stored property.
This is useful for sending notifications, synchronisation etc... (see example below)
Example 5. Concrete Example - ViewController Container
//Underlying instance variable (would ideally be private)
var _childVC : UIViewController? {
willSet {
//REMOVE OLD VC
pr...
Entity Framework 4 Single() vs First() vs FirstOrDefault()
...turned by a query but you only want to access the first item in your code (ordering could be important in the query here). This will throw an exception if the query does not return at least one item.
FirstOrDefault() - when you expect zero or more items to be returned by a query but you only want to...
What is an IIS application pool?
...website in 32 bit mode or have a scheduled recycle of the w3wp.exe process etc.All such things are controlled from iis application pool.
Hope it helps!
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Convert Array to Object
...completeness, reduceRight allows you to iterate over your array in reverse order:
[{ a: 1},{ b: 2},{ c: 3}].reduceRight(/* same implementation as above */)
will produce: {c:3, b:2, a:1}
Your accumulator can be of any type for you specific purpose. For example in order to swap the key and value o...
Convert dictionary to list collection in C#
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This will work, but might not be in the order you expect, even the dict was ordered by keys before, dict.Values is not...
– BooNonMooN
Jan 30 '19 at 11:39
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How do I merge two dictionaries in a single expression in Python (taking union of dictionaries)?
... example). Even if your values are hashable, since sets are semantically unordered, the behavior is undefined in regards to precedence. So don't do this:
>>> c = dict(a.items() | b.items())
This example demonstrates what happens when values are unhashable:
>>> x = {'a': []}
>&g...
Comparison of full text search engine - Lucene, Sphinx, Postgresql, MySQL?
... the indexer process uses too.
Scalability is where my knowledge is more sketchy - but it's easy enough to copy index files to multiple machines and run several searchd daemons. The general impression I get from others though is that it's pretty damn good under high load, so scaling it out across mu...
Display numbers with ordinal suffix in PHP
...ossible to get the ordinal number in word form? i.e. first, second, third, etc. instead of 1st, 2nd, 3rd...
– its_me
Oct 16 '13 at 19:05
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Is Chrome's JavaScript console lazy about evaluating arrays?
...ated function to clone. If you are only working with simple objects, where order of keys doesn't matter and there are no functions, you could always do:
console.logSanitizedCopy = function () {
var args = Array.prototype.slice.call(arguments);
var sanitizedArgs = JSON.parse(JSON.stringify(a...