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Are Swift variables atomic?
... dispatch.async {
let usec = Int(arc4random()) % 100_000
usleep(useconds_t(usec))
closure(dispatch)
self.dispatchGroup.leave()
}
}
}
}
Usage
Atomic().semaphoreSample()
//Atomic().dispatchQueueSync()
//At...
“On-line” (iterator) algorithms for estimating statistical median, mode, skewness, kurtosis?
...om your set (e.g. that you don't introduce a bias by picking the first 100'000 values). The same approach can also be used for estimating mode and median for the normal case (for both the sample mean is an estimator).
Further comments
All the algorithms above can be run in parallel (including many...
MySql Table Insert if not exist otherwise update
...edData (datenum,Timestamp)
VALUES ("734152.979166667","2010-01-14 23:30:00.000")
ON DUPLICATE KEY UPDATE
Timestamp=VALUES(Timestamp)
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regex.test V.S. string.match to know if a string matches a regular expression
... My two cents: performance is overrated. Either option can do ~15,000 operations in the flicker of a monitor, so unless you're doing bulk regex client-side, speed isn't relevant. Of course 'test' is logically the correct function if a boolean result is what you're after. Thanks for the Q/A ...
ElasticSearch - Return Unique Values
... "total" : 2,
"successful" : 2,
"failed" : 0
},
"hits" : {
"total" : 1000000,
"max_score" : 0.0,
"hits" : [ ]
},
"aggregations" : {
"langs" : {
"buckets" : [ {
"key" : "10",
"doc_count" : 244812
}, {
"key" : "11",
"doc_count" : 136794
}, {
"key" : "1...
How to scale down a range of numbers with a known min and max value
...
var arr = ["-40000.00","2","3.000","4.5825","0.00008","1000000000.00008","0.02008","100","-5000","-82.0000048","0.02","0.005","-3.0008","5","8","600","-1000","-5000"]; for this case, by your method ,numbers are getting too small . Is ther...
How do I catch a PHP fatal (`E_ERROR`) error?
...
Pfff, I remember those 650.000+ e-mails i got the following morning. Since then my ErrorHandler is capped at 100 emails per webserver.
– Bob Fanger
Sep 23 '09 at 8:12
...
Do subclasses inherit private fields?
...
Think of it this way. Borat's father Boltok has a safe containing $100,000. He does not want to share his "private" variable safe. So, he does not provide a key for the safe. Borat inherits the safe. But, what good is it if he cannot even open it ? If only his
dad had provided the key.
Parent ...
MongoDB vs. Cassandra [closed]
...s clear text. For SSL you have to go with Entprise edition. And that is 10,000$. Goodbye Mongodb. Refactoring my code to Cassandra.
– Karthik Sankar
Oct 2 '14 at 15:16
...
Convert Linq Query Result to Dictionary
...e objects. To keep it simple, I got a table in my BD with 20 columns, 100 000 rows and I'd want to extract a Dictionary using the values of the first 2 columns.
– Tipx
Jun 5 '09 at 2:04
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