Creating an empty box in scala lift is not hard, simply fill it with None.
var emptyBox:Box[MyThing] = Box(None); |
Author Archives: jontas
Scala lift figuring out the session id
If you need to use the session id of the current session then it can be fetched from S.
S.containerSession.map(_.sessionId).openOr("")) |
Java Array toString
Doing a toString on a array don’t really tell that much about the array. Here is one way to get the contents of the array as a string.
int[] myArray = new int[2]; myArray[0] = 1; myArray[1] = 2; System.out.println("array contains " + java.util.Arrays.toString(myArray)); //will output array contains [1, 2] |
Java Converting a int to a string
The Integer Class have a static method toString that takes a int as input and gives us back a string.
int myInt = 1; System.out.println(Integer.toString(myInt); |
This is a log more efficient and nice in the long run than just concating the int with a empty string ( myInt + “” ) as that actually creates a bit of overhead. Not much, but still.
Java Converting between Boolean & String
To convert from a Boolean to a string
new Boolean(new String("hej".equalsIgnoreCase("HEJ")).toString(); |
and then from a string to a boolean
boolean theValue = Boolean.parseBoolean(strBoolean); |
Java safe conversion of long to int
In most cases this is really not needed, if possible please keep the long as a long and work with it as such, but if needed the following works
public static int longToInt(long value) { if (value < Integer.MIN_VALUE || value > Integer.MAX_VALUE) { throw new IllegalArgumentException (value + " cannot be cast to int without changing its value."); } return (int) value; } |
The reason that theLong.intValue() is not suggested here is that intValue rounds the value to fit a int – it don’t say it can’t be done.
Linux what encoding is my file saved as
From the console the file command can be used to describe a file (with the encoding it is saved as)
user@comp:~/workspace/project$ file dbase/init.sql dbase/init.sql: UTF-8 Unicode (with BOM) English text |
using RedirectMatch to make Apache2 listen to several dns names and still not get content duplication
The trick we do here is to make one virtualhost for the “main” domain you wish indexed (and shown in browsers etc) and another one for all the other domains that will simply redirect to the main domain.
<VirtualHost *:80> ServerName example.com ServerAlias example.net ServerAlias example.biz RedirectMatch permanent /(.*) http://www.example.com/$1 </VirtualHost> <VirtualHost *:80> ServerName www.example.com ... other stuffs ... </VirtualHost> |
Find all files with name (recursively)
Quite simple to do if I only remember the command.
find -name *partoffilename* |
Will search from the current directory or a directory can be specified
find /the/path/ -name *partoffilename* |
ASP.net Sending mail using gmail
In order to send mail using a gmail address this can be used:
In Web.config
<system.net> <mailSettings> <smtp from="myemail@gmail.com" deliveryMethod="Network"> <network defaultCredentials="true" host="smtp.gmail.com" port="587" enableSsl="true" /> </smtp> </mailSettings> </system.net> |
And then in the code (in this case C# is used)
SmtpClient smtpClient = new SmtpClient(); smtpClient.UseDefaultCredentials = true; //reads the settings from web.config smtpClient.Credentials = new System.Net.NetworkCredential("myemail@gmail.com", "mypassword"); //and then send the message smtpClient.Send(mailMessage); |
Or if you don’t wish to save any settings in web.config
string host = "smtp.gmail.com"; int port = 587; SmtpClient smtpClient = new SmtpClient(host, port); smtpClient.UseDefaultCredentials = false; smtpClient.EnableSsl = true; smtpClient.Credentials = new System.Net.NetworkCredential("myemail@gmail.com", "mypassword"); //and then send the message contained in mailMessage smtpClient.Send(mailMessage); |
SmtClient at msdn
It might also be interesting to read up on mailmessage