Java – Round Double To Two Decimal Places

Round a double value to a given number of decimal places.

double longNumber = 25.3713789;

DecimalFormat df = new DecimalFormat(“0.0#”);
String roundedNumber = df.format(longNumber);

df = new DecimalFormat(“0.00#”);
roundedNumber = df.format(longNumber);


Mac OSX – How To Connect To A Remote Mac Using Apple Screen Sharing, For Free!

This article describes how to remote view another Mac using Apple Screen Sharing. There is no need to run any third party software as it can all be done using apple’s built in Screen Sharing services, for free! I’m using OS X EL Capitan, Version 10.11.13.

There is just one catch; both devices must use the same iCloud account. If you’re looking to connect to a Mac using different iCloud account then VNC is a good option. For now, I’ll concentrate on connecting to another Mac logged in with the same iCloud account.

Step 1: Open System Preferences on the Mac you plan to connect to from another device. click the Apple icon in the top-right bar, then select System Preferences

Step 2: Click the Sharing icon.

Step 3: Tick Screen Sharing in the Service list

Step 4 (Optional): That’s all the configuration required to access you Mac remotely if on the same WLAN/LAN. The following step is required if you plan to connect to your Mac from a separate network. Head back to System preferences then select iCloud.

Tick Back To My Mac.

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Step 5: Head over to your other Mac device and open Finder. You should now see your remote Mac’s name under Shared devices. Click your device, then click Share Screen

NOTE: If your remote Mac doesn’t appear in your Shared list, you may need to re-start Finder to scan for your device. (Apple Menu —> Force Quit… —> Select Finder and hit Relaunch)

The Share Screen button will Launch Apple’s built in Screen Sharing app allowing you to view and control your remote Mac.

You can right-click the Screen Sharing app icon from the dock while the app is running, then click Options, then Keep In Dock. This makes it easier to find the app in future. When the app is closed you can you can now right-click the app icon from the dock, then select your remote Mac to quickly connect.




SQL – How To Return Ref of Inserted Row

It is extremely useful to return the URN, or any other field, of a newly inserted row for a given table in a single query. The OUTPUT clause makes this possible.

insert into MY_TABLE (Field_1, Field_2, Field_3)
values (‘Foo’,’Bar’,’Example’)

The above example returns the REF field, which contains auto-incremented urn in MY_TABLE.

Mac OSX – How to switch between windows of same application

You can switch between applications by using the keyboard shortcut [ Apple + tab ]. Switching between Safari and XCode for example.

This is an invaluable time saving shortcut. But what about switching between windows of the same application?

Thats covered too. You can switch between windows of the same application by using the keyboard shortcut [ Apple + ` ]. Switching between multiple Finder windows or between XCode projects for example.

the ` key is located left of the z-key on a standard keyboard.