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MongoDB: Combine data from multiple collections into one..how?
How can I (in MongoDB) combine data from multiple collections into one collection?
11 Answers
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Is it faster to count down than it is to count up?
...s stuff is almost certainly irrelevant as there isn't a simple 1-1 mapping from instructions to clock cycles. (Though I could imagine it coming up if you were doing things like generating precisely timed video signals from a microcontroller. But then you'd write in assembly language anyway.)
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How to parse/format dates with LocalDateTime? (Java 8)
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Parsing date and time
To create a LocalDateTime object from a string you can use the static LocalDateTime.parse() method. It takes a string and a DateTimeFormatter as parameter. The DateTimeFormatter is used to specify the date/time pattern.
String str = "1986-04-08 12:30";
Date...
jQuery Mobile: document ready vs. page events
...alization.
pageremove can be fired and then handled when a page is removed from the DOM
Page loading jsFiddle example: http://jsfiddle.net/Gajotres/QGnft/
If AJAX is not enabled, some events may not fire.
Prevent page transition
If for some reason page transition needs to be prevented on so...
ES6 class variable alternatives
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@wintercounter the important thing to take from it is that allowing defining properties would define them on the prototype like the methods and not on each instance. Maximally minimal classes is still at its very core prototypical inheritance. What you really want to ...
Benefits of EBS vs. instance-store (and vice-versa) [closed]
I'm unclear as to what benefits I get from EBS vs. instance-store for my instances on Amazon EC2. If anything, it seems that EBS is way more useful (stop, start, persist + better speed) at relatively little difference in cost...? Also, is there any metric as to whether more people are using EBS now ...
What is the difference between atan and atan2 in C++?
...ng the arctangent of all four quadrants. std::atan only allows calculating from quadrants 1 and 4.
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How to use classes from .jar files?
...s, but I still can't find a solution for my problem. I need to use a class from a jar file called jtwitter.jar, I downloaded the file, and tried executing it (I found out yesterday that .jar files can be executed by double clicking on them) and Vista gave me an error saying "Failed to load Main-Clas...
Sending email with attachments from C#, attachments arrive as Part 1.2 in Thunderbird
...ource: http://www.coding-issues.com/2012/11/sending-email-with-attachments-from-c.html
using System.Net;
using System.Net.Mail;
public void email_send()
{
MailMessage mail = new MailMessage();
SmtpClient SmtpServer = new SmtpClient("smtp.gmail.com");
mail.From = new MailAddress("your m...
How to exit from PostgreSQL command line utility: psql
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cntrl+D to exit from any where
– vidur punj
Jan 22 '18 at 14:41
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