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Efficient SQL test query or validation query that will work across all (or most) databases
...ction pooling libraries provide the ability to test their SQL connections for idleness. For example, the JDBC pooling library c3p0 has a property called preferredTestQuery , which gets executed on the connection at configured intervals. Similarly, Apache Commons DBCP has validationQuery .
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What is an anti-pattern?
...n patterns which are common approaches to common problems which have been formalized and are generally considered a good development practice, anti-patterns are the opposite and are undesirable.
For example, in object-oriented programming, the idea is to separate the software into small pieces call...
Does my application “contain encryption”?
I'm uploading a binary for the first time. iTunes Connect has asked me:
15 Answers
15
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Does Java SE 8 have Pairs or Tuples?
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UPDATE: This answer is in response to the original question, Does Java SE 8 have Pairs or Tuples? (And implicitly, if not, why not?) The OP has updated the question with a more complete example, but it seems like it can be solved without using any kind of Pair struct...
Copy constructor versus Clone()
...eep) copy functionality to a class? Should one implement the copy constructor, or rather derive from ICloneable and implement the Clone() method?
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abort, terminate or exit?
...om there. This means that you are guaranteed that stack unwinding happens correctly and all destructors are called. In other words:
int main() {
try {
// your stuff
}
catch( ... ) {
return 1; // or whatever
}
}
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Determine whether JSON is a JSONObject or JSONArray
I am going to receive either a JSON Object or Array from server, but I have no idea which it will be. I need to work with the JSON, but to do so, I need to know if it is an Object or an Array.
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How can I use inverse or negative wildcards when pattern matching in a unix/linux shell?
Say I want to copy the contents of a directory excluding files and folders whose names contain the word 'Music'.
11 Answers...
How do I match any character across multiple lines in a regular expression?
For example, this regex
24 Answers
24
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How to use a switch case 'or' in PHP
Is there a way of using an 'OR' operator or equivalent in a PHP switch?
10 Answers
10
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