vkroz

Kafka frequent commands

Assuming that the following environment variables are set:

• KAFKA_HOME where Kafka is installed on local machine (e.g. /opt/kafka)
• ZK_HOSTS identifies running zookeeper ensemble, e.g. ZK_HOSTS=192.168.0.99:2181
• KAFKA_BROKERS identifies running Kafka brokers, e.g. KAFKA_BROKERS=192.168.0.99:9092

Server

Start Zookepper and Kafka servers

paulirish

What forces layout / reflow

All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.

Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.

Element APIs

Getting box metrics

• elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent

AArnott

public static class AwaitExtensions
{
    /// <summary>
    /// Provides await functionality for ordinary <see cref="WaitHandle"/>s.
    /// </summary>
    /// <param name="handle">The handle to wait on.</param>
    /// <returns>The awaiter.</returns>
    public static TaskAwaiter GetAwaiter(this WaitHandle handle)
    {
        Contract.Requires<ArgumentNullException>(handle != null);

zdam

/*
 * This is a litle tech demo to demonstrate using clojureCLR in a CLR web app.
 *
 * A custom IHttpHandler (ClojureHttpHandler) handles invocation of clojure code, 
 * and a custom IRouteHandler (ClojureRouteHandler) routes requests to the HttpHandler.
 *
 * See comments in the code for further detail. 
 *
 * Cheers, zdam
 * http://zimpler.com/blog/clojureclr-in-an-asp-net-mvc-app