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When to use MongoDB or other document oriented database systems? [closed]
... can retrieve data from only one collection and take advantage of only one index. And MongoDb is probably one of the most flexible NoSQL databases. In many scenarios, this means more round-trips to the server to find related records. And then you start de-normalizing data - which means background jo...
Dynamic array in C#
...
Not worth it, as long as you'are using indexer.
– aaimnr
Apr 15 '11 at 9:56
2
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C++: what regex library should I use? [closed]
...+11 - Do the tutorial: http://www.codeguru.com/cpp/cpp/cpp_mfc/stl/article.php/c15339
Note:
At the time of writing the only c++11 regex library that I know works is the clang/llvm one, and only works on Mac. The GNU still doesn't implement regex yet. I don't know about Visual Studio. Most people st...
Checking images for similarity with OpenCV
...de to entire research magazines.
I will outline the most common such techniques and their results.
Comparing histograms
One of the simplest & fastest methods. Proposed decades ago as a means to find picture simmilarities. The idea is that a forest will have a lot of green, and a human face a lot...
How to match “any character” in regular expression?
...Escaping:
Double escaping is not required for some languages such as, C#, PHP, Ruby, PERL, Python, JavaScript:
[\s\S]*
[\d\D]*
[\w\W]*
[\s\S]+
[\d\D]+
[\w\W]+
Test
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class RegularExpression{
public static void main(Stri...
Cannot add or update a child row: a foreign key constraint fails
... Referential integrity is supported by the presence of the correct index entries. As long as you've got your keys and indexes right, you should be able to disable the key check during a bulk input.
– Vernon Keenan
Jan 28 at 20:23
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Get array of object's keys
... Or each, if you're doing something with them. $.each(foo, function(index, value){/* do something with index */});
– Chris
Jan 27 at 18:07
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No module named pkg_resources
...
Reported the bug to CentOS.org bugs.centos.org/view.php?id=14042
– rjt
Oct 20 '17 at 19:22
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Haskell function composition (.) and function application ($) idioms: correct use
...her than just chaining a big dictionary of prefabbed function calls like a PHP user.
– Evan Carroll
Jun 22 '10 at 15:20
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Storing images in SQL Server?
...mages, while mySQL allows for easier access, specially from languages like PHP.
I found a similar question
MySQL BLOB vs File for Storing Small PNG Images?
My final verdict was that for things such as a profile picture, just a small square image that needs to be there per user, mySQL would be be...