jboner

Latency Comparison Numbers (~2012)
----------------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD

havvg

jQuery(function($) {
    $('form[data-async]').live('submit', function(event) {
        var $form = $(this);
        var $target = $($form.attr('data-target'));

        $.ajax({
            type: $form.attr('method'),
            url: $form.attr('action'),
            data: $form.serialize(),

EugeneLoy

@Rule
public TestRule loggingRule = new TestWatcher() {
    protected void starting(Description description) {
		Logger logger = LoggerFactory.getLogger(description.getClassName());
		logger.info("Starting: {}", description.getMethodName());
	}
};

PauloLuan

public static String getExternalSdCardPath() {
        String path = null;
        
        File sdCardFile = null;
        List<String> sdCardPossiblePath = Arrays.asList("external_sd", "ext_sd", "external", "extSdCard");
        
        for (String sdPath : sdCardPossiblePath) {
                File file = new File("/mnt/", sdPath);
                
                if (file.isDirectory() && file.canWrite()) {

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

---

This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

---

EugeneLoy

package object utils {

  /**
   * Helper that allows to call private methods on Scala/Java objects.
   * 
   * Usage: `someObject.exposeMethod('methodName)(arg1, arg2, arg3)`
   *
   * See: https://gist.github.com/EugenyLoy/5873642543f869c7e25f
   */
  implicit class ExposePrivateMethods(obj: AnyRef) {

theikkila

[
        "Automotive",
        "Budgeting",
        "HVAC",
        "Heaters",
        "Hydraulics",
        "Logistics Management",
        "Management",
        "Negotiation",
        "Project Planning",

EugeneLoy

curl -i https://api.github.com/repos/EugenyLoy/awesome-github > `date -u '+%F'_%H_%M`.txt

bastman

Docker - How to cleanup (unused) resources

Once in a while, you may need to cleanup resources (containers, volumes, images, networks) ...

delete volumes

// see: https://github.com/chadoe/docker-cleanup-volumes

$ docker volume rm $(docker volume ls -qf dangling=true)

$ docker volume ls -qf dangling=true | xargs -r docker volume rm

EugeneLoy

Searching ---------------------------------------------------------------------

Find all files that has full filename pattern "YYY" in this rdirectory, recursive:
    find . -wholename "YYY"

Find all matches of regexp "XXX" in file YYY:
    grep -n -E "XXX" YYY

Find all occurences of "XXX" in all files with name "YYY" in this directory, recursive:
    find . -name "YYY" -print0 | xargs -0 grep -n -F "XXX"