Tutorial by Examples: ai

Use swap (from Data.Tuple) to swap the components of a pair. import Data.Tuple (swap) swap (1, 2) -- evaluates to (2, 1) Or use pattern matching. case (1, 2) of (x, y) => (y, x) -- evaluates to (2, 1)

Foreign keys enables you to define relationship between two tables. One (parent) table need to have primary key that uniquely identifies rows in the table. Other (child) table can have value of the primary key from the parent in one of the columns. FOREIGN KEY REFERENCES constraint ensures that valu...

Let's assume that we have one row in Company table with companyId 1. We can insert row in employee table that has companyId 1: insert into Employee values (17, 'John', 1) However, we cannot insert employee that has non-existing CompanyId: insert into Employee values (17, 'John', 111111) Msg ...

sys.foreignkeys system view returns information about all foreign key relationships in database: select name, OBJECT_NAME(referenced_object_id) as [parent table], OBJECT_NAME(parent_object_id) as [child table], delete_referential_action_desc, update_referential_action_desc from sys.foreign...

string[] portNames = SerialPort.GetPortNames();

In addition to image classification datasets, Caffe also have "HDF5Data" layer for arbitrary inputs. This layer requires all training/validation data to be stored in hdf5 format files. This example shows how to use python h5py module to construct such hdf5 file and how to setup caffe &quo...

The same example above, Image loading, can be written using async functions. This also allows using the common try/catch method for exception handling. Note: as of April 2017, the current releases of all browsers but Internet Explorer supports async functions. function loadImage(url) { return...

From documentation: The HttpContext.Items collection is the best location to store data that is only needed while processing a given request. Its contents are discarded after each request. It is best used as a means of communicating between components or middleware that operate at different poi...

First you need to load the email library. Do this either in the controller file that will be sending the email: $this->load->library('email'); Or load it globally in the autoload.php file in the config folder: $autoload['libraries'] = array('email'); While you're there, you may want t...

Create a new file in the application/config folder named email.php Set the parameters for sending email. These will load when you send your email. $config['newline'] = "\r\n"; //You must use double quotes on this one $config['protocol'] = 'smtp'; $config['smtp_host'] = 'ssl://smtp.gmai...

$this->email->from('[email protected]', 'Tom Webmaster'); $this->email->to('[email protected]', 'Freddie Fakeperson'); $this->email->subject('Your Account Is Active'); $this->email->message('Welcome to our new site!'); In the 'from' method, the first parameter is the...

$sent = $this->email->send(); //This is optional - but good when you're in a testing environment. if(isset($sent)){ echo "It sent!"; }else{ echo "It did not send."; }

But you don't just want a plain text email. You want a pretty html email. Set your config file as html: $config['mailtype'] = 'html'; If you want to pass data (like a username for example) to the html email, put them in an array: $data = array('name' => $name, 'email' => ...

The methods object.wait(), object.notify() and object.notifyAll() are meant to be used in a very specific way. (see http://stackoverflow.com/documentation/java/5409/wait-notify#t=20160811161648303307 ) The "Lost Notification" problem One common beginner mistake is to unconditionally cal...

You can also make code run synchronously with the main thread using runTask. This is useful when you want to call Bukkit API methods after running code asynchronously from the main thread. Code called inside of this Runnable will be executed on the main thread, making it safe to call Bukkit API met...

post-receive hooks can be used to automatically forward incoming pushes to another repository. $ cat .git/hooks/post-receive #!/bin/bash IFS=' ' while read local_ref local_sha remote_ref remote_sha do echo "$remote_ref" | egrep '^refs\/heads\/[A-Z]+-[0-9]+$' >/dev/null &am...

a='I am a simple string with digits 1234' pat='(.*) ([0-9]+)' [[ "$a" =~ $pat ]] echo "${BASH_REMATCH[0]}" echo "${BASH_REMATCH[1]}" echo "${BASH_REMATCH[2]}" Output: I am a simple string with digits 1234 I am a simple string with digits 1234

Some "classic" Prolog textbooks still use the confusing and error-prone failure-driven loop syntax where a fail construct is used to force backtracking to apply a goal to every value of a generator. For example, to print all numbers up to a given limit: fdl(X) :- between(1,X,Y), print(Y),...

This example has two parts - some boilerplate steps for adding Castle Windsor to your WCF service, and then a simple, concrete example to show how we configure and use Windsor's container. That makes the example a little bit long. If you already understand using a DI container then you likely only ...

NIO appeared in Java 1.4 and introduced the concept of "Channels", which are supposed to be faster than regular I/O. Network-wise, the SelectableChannel is the most interesting as it allows to monitor different states of the Channel. It works in a similar manner as the C select() system ca...