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quick random row selection in Postgres
... that contains couple of millions of rows. I have checked on the internet and I found the following
7 Answers
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What's the difference between `1L` and `1`?
... (or 2L , 3L , etc) appear in R code. Whats the difference between 1L and 1 ? 1==1L evaluates to TRUE . Why is 1L used in R code?
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Favorite Visual Studio keyboard shortcuts [closed]
...r favorite Visual Studio keyboard shortcut? I'm always up for leaving my hands on the keyboard and away from the mouse!
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How do I install cURL on cygwin?
I tried to enable curl on cygwin but it says bash: curl: command not found
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What causes java.lang.IncompatibleClassChangeError?
I'm packaging a Java library as a JAR, and it's throwing many java.lang.IncompatibleClassChangeError s when I try to invoke methods from it. These errors seem to appear at random. What kinds of problems could be causing this error?
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Is there a Java equivalent or methodology for the typedef keyword in C++?
Coming from a C and C++ background, I found judicious use of typedef to be incredibly helpful. Do you know of a way to achieve similar functionality in Java, whether that be a Java mechanism, pattern, or some other effective way you have used?
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Interfaces with static fields in java for sharing 'constants'
I'm looking at some open source Java projects to get into Java and notice a lot of them have some sort of 'constants' interface.
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How do I read the contents of a Node.js stream into a string variable?
...hacking on a Node program that uses smtp-protocol to capture SMTP emails and act on the mail data. The library provides the mail data as a stream, and I don't know how to get that into a string.
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EProgrammerNotFound exception in Delphi?
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It is just the result of a long day and we had gotten a little giddy. For many, many years (ever since I'd been on the team), we'd always joked about replacing some error message in the compiler for one of the most common errors with a similar message. Internal...
Java: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification
...is article author describes how to fetch the certificate from your browser and add it to cacerts file of your JVM. You can either edit JAVA_HOME/jre/lib/security/cacerts file or run you application with -Djavax.net.ssl.trustStore parameter. Verify which JDK/JRE you are using too as this is often a s...