Check your currently implemented firewall rules with the following command:
iptables -L
Examine the output. On a clean Ubuntu installation you will see an empty ruleset:
Chain INPUT (policy ACCEPT) target prot opt source destination Chain FORWARD (policy ACCEPT) target prot opt source destination Chain OUTPUT (policy ACCEPT) target prot opt source destination
Without going into particulars, it suffices to say that Ubuntu 12.04 has the following script that sets up encrypted swap:
ecryptfs-setup-swap
It could be useful sometimes to know what variables are defined at particular point of PHP script in order to have a better understanding of the code you are debugging. In contrast with C++, PHP has a magic function get_defined_vars ( void ) that returns an array of all defined variables with their values so we can output all variable names with the following line of code:
print_r(array_keys(get_defined_vars()));
Install JDK 6 with the following command:
apt-get install default-jdk
Download the latest OFBiz version, extract it in your home directory and do the following steps described in the README file.
Having apache-ofbiz-XX.XX.XX as the current directory execute the following command:
./ant load-demo
Today I successfully installed Tomcat 7 on Ubuntu Server 12.4 LTS with the following commands (executed as root):
apt-get install default-jdk apt-get install tomcat7 apt-get install tomcat7-admin apt-get install tomcat7-examples
Git installs as a normal package on Ubuntu:
sudo apt-get install git |
Configuring Git user is an optional step:
git config --global user.email "you@example.com"git config --global user.name "Your Name" |
Type the following command to create an empty repository wherever your code is:
cd ~git init |
Fortunately, to compile BOOST with MS VC 2010 we need Visual Studio Command Prompt and five commands:
Navigate to BOOST directory, for example:
F: cd F:\Projects\Lib\boost_1_53_0
I believe that the simplest way to pass complex data from C# to PHP is through WCF service. See my previous post How to implement WCF service in PHP for more details.
Let assume we have a WCF service contract that has the following method with some nested dictionary as a parameter:
[ServiceContract]
public interface IStore
{
[OperationContract]
void UpdateRows(Dictionary<int, Dictionary<string, object>> rows);
}
Below I provided the sample implementation of UpdateRows in PHP that iterates through nested dictionaries (first level called ‘rows’ and second level called ‘properties’):
WPF implements UI Virtualization via VirtualizingStackPanel and it works great, but situation with Data Virtualization is a bit more complex.
After doing some experimentation I realized that VirtualizingStackPanel when used with WPF TreeView does not allow the data to be virtualized because it iterates through all the collection of data items from inside its MeasureOverride function. However, it access only visible data items when used with DataGrid or ListView, so it allows to use some paging or caching techniques in this case. See the following articles for more information:
If you interested on what I tried to do with TreeView, please read below.
A long time ago, STL had auto_ptr<Type> class that automatically deleted a dynamically allocated C++ object when control leaves a block. Personally, I believe that auto_ptr<Type> was typically used in simple scenarios as a local variable or a class member but theoretically it is even possible to declare a vector of auto_ptr<Type> because auto_ptr<Type> stores an ownership indicator and its copy constructor transfers the ownership from the instance being copied, so vector::push_back(…) and vector::resize(…) functions works correctly.
