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Scala Doubles, and Precision
...u may use implicit classes:
import scala.math._
object ExtNumber extends App {
implicit class ExtendedDouble(n: Double) {
def rounded(x: Int) = {
val w = pow(10, x)
(n * w).toLong.toDouble / w
}
}
// usage
val a = 1.23456789
println(a.rounded(2))
}
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How do I iterate over a JSON structure? [duplicate]
...nning to skip "five"
});
jQuery.each(obj, function(i, val) {
$("#" + i).append(document.createTextNode(" - " + val));
});
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Compare two folders which has many files inside contents
Have two folders with approx. 150 java property files.
5 Answers
5
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How do I reference a Django settings variable in my models.py?
...e to a project deployed in several environments, do not try to import from app.settings. Overwritten variables in the other files won't take effect. Always use the import mentioned in this answer. It took me a few hours to realize what was going on in my project.
– Ev.
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Best way for a 'forgot password' implementation? [closed]
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Update: revised in May 2013 for a better approach
The user enters his username and hits "forgot password". I also recommend the option of entering the email address instead of the username, because usernames are sometimes forgotten too.
The system has a table pass...
What is the best project structure for a Python application? [closed]
Imagine that you want to develop a non-trivial end-user desktop (not web) application in Python. What is the best way to structure the project's folder hierarchy?
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Access mysql remote database from command line
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For Mac, use the following command:
mysql -u app -h hostaddress -P port -D dbname -p
and then enter the password when prompted.
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What is the difference between 127.0.0.1 and localhost
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some applications will treat "localhost" specially. the mysql client will treat localhost as a request to connect to the local unix domain socket instead of using tcp to connect to the server on 127.0.0.1. This may be faster, an...
Android; Check if file exists without creating a new one
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It worked for me:
File file = new File(getApplicationContext().getFilesDir(),"whatever.txt");
if(file.exists()){
//Do something
}
else{
//Nothing
}
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When should one use RxJava Observable and when simple Callback on Android?
I'm working on networking for my app. So I decided to try out Square's Retrofit . I see that they support simple Callback
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