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What is the fastest way to get the value of π?
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This is the method we used to calculate Pi in a java project in school. Just used a randomizer to come up with the x,y coordinates and the more 'darts' we threw the closer to Pi we came.
– Jeff Keslinke
Feb 2 '09 at 21:01
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Set time part of DateTime in ruby
...ticular part of a given date instance. For example the year. Any ideas? In Java I would just use the setter for year. But it doesn't work in Ruby :-(
– Robert Reiz
Jul 6 '13 at 12:27
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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
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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
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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
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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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