DZone Snippets: tiger code

Handy Iterable for a range of Integers

asgeirn (Asgeir S. Nilsen) — Tue, 10 Apr 2007 14:39:26 GMT

Looping a specific number of times produces code a bit too verbose in Java. The JDK5 enhanced for statement is a handy improvement, but you still have to fall back to the traditional for statement if you want to repeat a loop, say, 10 times.

Not with this implementation of Iterable. You can use it like this:



for (int i : new Range(100))

    System.out.printf("I have said this %d times. Read dzone.com!%n", i);



class Range implements Iterable {

    

    private final Integer stop;

    

    public Range(int stop) {

        this.stop = stop;

    }



    public Iterator iterator() {

        return new Iterator() {

            

            private Integer counter = 0;



            public boolean hasNext() {

                return (counter != stop);

            }



            public Integer next() {

                if (counter == stop)

                    throw new NoSuchElementException();

                return ++counter;

            }



            public void remove() {

            }};

    }

    

}

How to create a RAM disk on OS X

peter (Peter Cooperx) — Thu, 30 Mar 2006 21:25:22 GMT

32768 = size in sectors (16MB in this case, a sector is 512 bytes)



$ hdid -nomount ram://32768

/dev/disk1

$ newfs_hfs /dev/disk1

$ mkdir /tmp/ramdisk1

$ mount -t hfs /dev/disk1 /tmp/ramdisk1

To unmount:



hdiutil detach /dev/disk1

Clear DNS lookup / IP address cache on OS X Tiger

peter (Peter Cooperx) — Thu, 25 Aug 2005 06:37:15 GMT

lookupd -flushcache

Change OS X's default screenshot image format

peter (Peter Cooperx) — Fri, 08 Jul 2005 23:59:18 GMT

At the prompt, type this:

defaults write com.apple.screencapture type image_format

Replace "image_format" with a file format name, like pdf, png, tiff, etc. Then to take screenshots, Cmd+Shift+4, then drag around the area you want to capture.

MySQL Launchd item for Mac OS X Tiger

jstetser (Jake Stetser) — Tue, 07 Jun 2005 16:14:06 GMT

(Originally posted at Unquiet)

I had to reinstall Mysql because it wasnâ€™t one of the things I backed up before erasing my hard drive. Since Iâ€™m now running Mac OS X 10.4 â€œTigerâ€?, I decided to set it up to start when the system boots, but the system for creating startup items has changed slightly. So I saved the following xml in /Library/LaunchDaemons/com.mysql.Mysql.plist:



             "-//Apple Computer//DTD PLIST 1.0//EN" "

        http://www.apple.com/DTDs/PropertyList-1.0.dtd">

    

    

        Label

        com.mysql.Mysql

        OnDemand

        

        ProgramArguments

        

                /usr/local/mysql/bin/mysqld_safe

        

        ServiceDescription

        Mysql 4.1 Database Server

        UserName

        mysql

        WorkingDirectory

        /usr/local/mysql

Note that I'm using the official OSX distribution of MySQL... but with a few changes to match your database location, you can get this to work with other installs (fink, darwinports, etc).