Just a small thing encase anyone else finds this interesting as such.. but you cannot add a set of ” ” strings together in c++ without declaring one being a string.. for example
cout << "hi" + "bye" << endl;
the error would be
error: invalid operands of types ‘const char [3]’ and ‘const char [4]’ to binary ‘operator+’
because c++ treats them both as char[] variables and not as a string, so you need to wrap one up into a string for it to work
cout << string("hi") + "bye" << endl;
When you are coding with pointers in c++ and you want to access the function/variable from that pointer deferenced, how come you cannot use something like below.
struct typeT{ int value1; }; typeT* tt = new typeT; *tt.value1;
it is because the access element of the variable tt is higher in the compiler and thus it tries to equate
tt.value1first, which is not a good thing because the tt has not been de-referenced and thus it is just a memory address pointer to the actual object. so you need to do
(*tt).value1
because like in maths the () will be equated first and then the access element part “.” and thus to make it easier
tt->value1
will change to
(*tt).value1
within the compiler.
Within kubuntu (or ubuntu derived setups) you can have a moonlight development .. aka the silverlight open source version that will run on linux.
if you install the
monodevelop-moonlight
and also the
monodoc-moonlight-manual
packages, the last one is the manual if you need some help, but the first one will allow the monodevelop development environment have the moonlight plugin which creates a project to develop silverlight applications in.
It all depends on your type of coding, but I for style I do prefer to put array data within a separate part of the echo statement, for example.
$arr = array("first" => 1, "second" =>2); echo "this is the first value " . $arr["first"];
but of course you can put the arr object within the echo statement as long as you { .. } it out, which is kinder similar to using the ” . as such,
echo "this is the second value {$arr["second"]}";
both work, but because of the array object uses the “..” for the hash key, then you will need to use the { .. }
If you get a error like
Error: X session cannot start /tmp Error: unable to write to the /tmp
or similar errors to the above when trying to log into KDE
it could be because you have run out of inodes (the disk structure that allows you to create new files) or hard drive space.
I had this same problem, and after doing
apt-get cleanto clean out of the temporary files that apt-get has used
and also since I am compiling up my own kernels, I deleted some of the
/usr/src linux-source linux-source-2.6.32
directories and then I was able to start up X, which is great.. something of a better error would have been better.. cannot create file, make sure that you have the space!!. sort of thing..
also sometimes if your X session does not start, if you delete your home directory (The user’s home directory that you are trying to login to) .Xauthority
e.g.
rm ~/.Xauthority
because that is sometimes a lock on the xsession.
Because I own the codingfriends.co.uk, but would like to point that to the www.codingfriends.com
Here is a good way to make it so that any requests to the domain name codingfriends.co.uk (rewrite condition of the host record) will redirect to www.codingfriends.com with a redirection of HTTP 301 (moved permanently).
RewriteEngine On
RewriteCond ${HTTP_HOST} !^(www)\.codingfriends\.co\.uk
RewriteRule (.*) http://www.codingfriends.com/$1 [L,R=301]Save that to the .htaccess root directory file. Hope that helps.
Someone asked me whilst doing a job how to delete parts of a array within javascript, so just like other object oriented languages, you can have a array of data objects and each one can be accessible and removable. To achieve this with javascript you use the delete method as below.
var myArray = new Array(); myArray[0] = "first value"; myArray[1] = "second value"; // and to delete the second value delete myArray[1];