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How to upgrade PostgreSQL from version 9.6 to version 10.1 without losing data?
... new file called /etc/apt/sources.list.d/pgdg.list and add below line
deb http://apt.postgresql.org/pub/repos/apt/ utopic-pgdg main
Follow below commands
wget -q -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get update
sudo apt-get install postgresql-9.4
s...
What's the point of having pointers in Go?
...
I really like example taken from http://www.golang-book.com/8
func zero(x int) {
x = 0
}
func main() {
x := 5
zero(x)
fmt.Println(x) // x is still 5
}
as contrasted with
func zero(xPtr *int) {
*xPtr = 0
}
func main() {
x := 5
...
Add Bootstrap Glyphicon to Input Box
...m-control-feedback"></span>
</div>
</form>
DEMO : http://jsfiddle.net/LS2Ek/1/
This demo is based on an example in Bootstrap docs. Scroll down to "With Optional Icons" here http://getbootstrap.com/css/#forms-control-validation
...
What is a Manifest in Scala and when do you need it?
...using type-classes in scala, and is well explained here by Debasish Ghosh:
http://debasishg.blogspot.com/2010/06/scala-implicits-type-classes-here-i.html
Context bounds can also just make the method signatures more readable. For example, the above function could be re-written using context bounds ...
What is the difference between Pan and Swipe in iOS?
...
According to http://hammerjs.github.io/, I think the difference is:
pan: move directions in the same big view
swipe: switch between several views
The gesture is the same, both use one finger and move.
...
Android static object lifecycle
...ass along
your search criteria from activity to
activity (similar to a web http
request)
using application preferences, you
could save the values and retrieve
them in the activity that needs them
using the sqlite database you can
persist them in a table and retrieve
them later
if you need to just sa...
What is Full Text Search vs LIKE
... all languages for example MSSQL doesn't support Greek (check on this page http://msdn.microsoft.com/en-us/library/ms176076(v=sql.110).aspx )
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How to get a pixel's x,y coordinate color from an image?
... transparency with 0 being fully transparent.
Here is a jsFiddle example: http://jsfiddle.net/thirtydot/9SEMf/869/ I used jQuery for convenience in all of this, but it is by no means required.
Note: getImageData falls under the browser's same-origin policy to prevent data leaks, meaning this tech...
Performant Entity Serialization: BSON vs MessagePack (vs JSON)
...-checking API, MessagePack supports IDL. (specification is available from: http://wiki.msgpack.org/display/MSGPACK/Design+of+IDL)
Protocol Buffers and Thrift require IDL (don't support dynamic-typing) and provide more mature IDL implementation.
MessagePack has streaming API (Ruby, Python, Java, C++...
Encrypt and decrypt a string in C#?
...comings, please see jbtule's answer for a more robust, informed solution.
https://stackoverflow.com/a/10366194/188474
Original Answer:
Here's a working example derived from the "RijndaelManaged Class" documentation and the MCTS Training Kit.
EDIT 2012-April: This answer was edited to pre-pend ...