szydan

echo -e "flush_all\nquit\n" | telnet localhost 11211

szydan

#how to create a file of certain size and random content

dd if=/dev/urandom of=output.dat  bs=1024  count=1024

#the same for zero’ish content 

dd if=/dev/zero of=output.dat  bs=1024  count=1024

szydan

// where data is Object
ObjectMapper mapper = new ObjectMapper();

MyClass myClass = mapper.readValue(mapper.writeValueAsString(data), ConsoleEvent.class);

// then to convert the object to json 
mapper.writeValue(System.out, myClass);

// with pretty printng
ObjectWriter writer = mapper.writerWithDefaultPrettyPrinter();

szydan

sudo ipfw pipe 1 config bw 350kbit/s plr 0.05 delay 500ms
sudo ipfw add pipe 1 dst-port http

#to reset to your initial settings:

sudo ipfw flush

szydan

for h in root@apps0{1,2}; do scp app.war $h:/var/lib/tomcat6/. && ssh $h 'cd /var/lib/tomcat6 && mv app.war webapps/. && echo Upgraded on $(hostname)'; done

szydan

/*
 *  Copy file from hdfs to local disk without hadoop installation
 *  
 *  params are something like 
 *  hdfs://node01.sindice.net:8020 /user/bob/file.zip file.zip
 *
 * Credits for Josef Niedermeier
 *
 */

szydan

You're Missing the Point of Promises

Promises are a software abstraction that makes working with asynchronous operations much more pleasant. In the most basic definition, your code will move from continuation-passing style:

getTweetsFor("domenic", function (err, results) {
    // the rest of your code goes here.
});

szydan

// here searching for .when( string inside my workspaces 
find ~/workspace*/ -iname "*.js" -exec grep --color -lI "\.when(" '{}' \;

szydan

// borrowed from jsvascript garden 
// http://bonsaiden.github.com/JavaScript-Garden/#function.closures
// In order to copy the value of the loop's index variable, it is best to use an anonymous wrapper

for(var i = 0; i < 10; i++) {
    (function(e) {
        setTimeout(function() {
            console.log(e);  
        }, 1000);
    })(i);

szydan

@Test
public void testAdd() {
   Assume.assumeTrue(someCondition());
   // eg Assume.assumeTrue(SystemUtils.IS_OS_UNIX);
   ...
}