I know it is an old question, but now it is possible to use random_score, with the following search query: { “size”: 1, “query”: { “function_score”: { “functions”: [ { “random_score”: { “seed”: “1477072619038” } } ] } } } For me it is very fast with about 2 million documents. I use current timestamp … Read more
This should be considerably faster than both answers above and supports seeding: curl -XGET ‘localhost:9200/_search’ -d ‘{ “query”: { “function_score” : { “query” : { “match_all”: {} }, “random_score” : {} } } }’; See: https://github.com/elasticsearch/elasticsearch/issues/1170
These works but probably you didn’t use the right namespace, just use the use statement at the top of your class name like this: <?php namespace SomeNamespace; use App\Quotation; // Says “Quotation.php” is in “App” folder (By default in L-5.0) class someClass { //… } Then you may use in your method something like this: … Read more
If file sizes could be specified accurate to the bit, for any file size N, there would be precisely 2^(N+1)-1 possible files of N bits or smaller. In order for a file of size X to be mapped to some smaller size Y, some file of size Y or smaller must be mapped to a … Read more
Lua indexes tables from 1, unlike C, Java etc. which indexes arrays from 0. That means, that in your table, the valid indexes are: 1, 2, 3, 4. What you are looking for is the following: print( myTable[ math.random( #myTable ) ] ) When called with one argument, math.random(n) returns a random integer from 1 … Read more
In Swift there is actually a protocol for enums called CaseIterable that, if you add it to your enum, you can just reference all of the cases as a collection with .allCases as so: enum GeometryClassification: CaseIterable { case Circle case Square case Triangle } and then you can .allCases and then .randomElement() to get … Read more
Kotlin 1.3 and above: Kotlin 1.3 is now available with Multiplatform Random Number Generator! You can use it like this : import kotlin.random.Random fun main() { println(Random.nextBoolean()) println(Random.nextInt()) } Try it online! or in your case fun main() { val list = (1..9).filter { it % 2 == 0 } println(list.random()) } Try it online! … Read more
You’ll want to use the order and limit methods instead. You can get rid of the all. For PostgreSQL and SQLite: User.order(“RANDOM()”).limit(10) Or for MySQL: User.order(“RAND()”).limit(10)
2 reasons: You have to initalize the global Source used by rand.Intn() and other functions of the rand package using rand.Seed(). For example: rand.Seed(time.Now().UnixNano()) See possible duplicate of Difficulty with Go Rand package. Quoting from package doc of rand: Top-level functions, such as Float64 and Int, use a default shared Source that produces a deterministic … Read more