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.NET List Concat vs AddRange
...t and AddRange with a List<KeyValuePair<string, string>> with 1000 elements, concatenated/added 100 times, and AddRange was extremely faster. The results were these: AddRange 13 ms, Concat().ToList() 16,000 ms, and Concat on an IEnumerable doing only the ToList at the end: 2,700 ms.
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How to avoid null checking in Java?
... community wiki
13 revs, 11 users 77%cletus
637
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Change Name of Import in Java, or import two classes with the same name
...hese situations would occur less frequently in java (where you can have 10.000+ classes) than in other languages (where you usually have less classes) which do support this "sugar" syntax.
– Alain Pannetier
May 21 '17 at 18:29
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What are best practices that you use when writing Objective-C and Cocoa? [closed]
...hare
edited May 23 '17 at 11:54
community wiki
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Is there any performance gain in indexing a boolean field?
...f there are relatively few records of one value. For example, if you have 1000 records and 10 of them are TRUE, then it would be useful if you searching with isok = 1
As Michael Durrant mentioned, it also makes writes slower.
EDIT: Possible duplication: Indexing boolean fields
Here it explains th...
C/C++ maximum stack size of program
...es) So assuming worst case, depth of recursive function calls can go upto 10000 with each call taking upto say 20 bytes. So is it feasible means is there a possibility of stackoverflow?
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What is the purpose of the implicit grant authorization type in OAuth 2?
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edited Jun 11 '18 at 6:20
Matt Ke
2,34388 gold badges2020 silver badges3333 bronze badges
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Preferred order of writing latitude & longitude tuples in GIS services
...1770's. Britain therefore claimed the Prime Meridian by using Greenwich as 000deg for their maps. After 100 years of their use, the Prime Meridian was accepted internationally, in 1884.
In Christopher Columbus time Latitude was the only number they had. The strategy was to traverse a parallel befo...
Singleton with Arguments in Java
... should use regular, non-singleton classes instead (for example needing 10.000 differently parametrized singleton).
Here is an example for such store:
public final class UsefulObjFactory {
private static Map<Integer, UsefulObj> store =
new HashMap<Integer, UsefulObj>();
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How do I run all Python unit tests in a directory?
...--------------------------------------------------------- Ran 4 tests in 0.000s OK Why? The difference, where it comes from?
– simkus
Apr 22 '18 at 5:58
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