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Check if a string contains a string in C++
...lace and many other staff.You can compare std::string to the string api in Java.PS:Also I do think contains is much more elegant than find to check if a string contains another string.
– Geng Jiawen
Jun 23 '14 at 8:01
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Can JavaScript connect with MySQL?
Can JavaScript connect with MySQL? If so, how?
18 Answers
18
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Understanding ibeacon distancing
...o match our data points. The algorithm we came up with is shown below as Java code.
Note that the term "accuracy" here is iOS speak for distance in meters. This formula isn't perfect, but it roughly approximates what iOS does.
protected static double calculateAccuracy(int txPower, double rssi...
A regex to match a substring that isn't followed by a certain other substring
...
Not the answer you're looking for? Browse other questions tagged java regex clojure or ask your own question.
“ArrayAdapter requires the resource ID to be a TextView” xml problems
...is, R.layout.a_layout_file, R.id.a_text_view_within_layout, this.file) See javadoc for android.widget.ArrayAdapter
– Petr Gladkikh
Apr 18 '13 at 2:34
6
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How do you match only valid roman numerals with a regular expression?
...input.matches(regx)) -> this evalulates to false for MMMCM / MMMM in java.
– amIT
Aug 10 '14 at 14:07
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How do I check if a list is empty?
...le or your array is wrapped in some container that tracks the length. C++, Java, C# have such containers and implement some "length" method efficiently. C has no such thing, you have to roll your own. Statically allocated C arrays are just pointers to a memory space that is guaranteed to have enough...
How do ACID and database transactions work?
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Check out the Transactions chapter in my High-Performance Java Persistence book for a detailed answer for all those questions.
– Vlad Mihalcea
Feb 16 at 21:20
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Compare object instances for equality by their attributes
...ance, Python will compare them by keys / values automatically. This is not Java...
– e-satis
Aug 4 '09 at 16:32
The fi...
How to unit test an object with database queries
...'ll be slow, but less error prone.
Inject the database. (Example in pseudo-Java, but applies to all OO-languages)
class Database {
public Result query(String query) {... real db here ...}
}
class MockDatabase extends Database {
public Result query(String query) {
return "mock result";
}...