Tutorial by Examples: g

To Initialize a session, you can simply load it in your controller, this us usually placed inside the controller constructs, but it also can be autoloaded into the array found inside application/config/autoload.php: $this->load->library('session');

A session is simply an array consisting of the following user information: The user's unique Session ID (this is a statistically random string with very strong entropy, hashed with MD5 for portability, and regenerated (by default) every five minutes) The user's IP Address The user's User Agent ...

Objective-C NSPredicate *predicate = [NSPredicate predicateWithBlock:^BOOL(id item, NSDictionary *bindings) { return [item isKindOfClass:[UILabel class]]; }]; Swift let predicate = NSPredicate { (item, bindings) -> Bool...

Objective-C NSPredicate *predicate = [NSPredicate predicateWithFormat: @"self[SIZE] = %d", 5)]; Swift let predicate = NSPredicate(format: "self[SIZE] >= %d", 5) In this example, the predicate will match items that are arrays with length of at least 5.

An NSPredicate can use substitution variables to allow values to be bound on the fly. Objective-C NSPredicate *template = [NSPredicate predicateWithFormat: @"self BEGINSWITH $letter"]; NSDictionary *variables = @{ @"letter": @"r" }; NSPredicate *beginsWithR = [templ...

Objective-C NSArray *heroes = @[@"tracer", @"bastion", @"reaper", @"junkrat", @"roadhog"]; NSPredicate *template = [NSPredicate predicateWithFormat:@"self BEGINSWITH $letter"]; NSDictionary *beginsWithRVariables = @{ @"letter&qu...

To prevent memory leaks, one should not forget to close an input stream or an output stream whose job is done. This is usually done with a try-catch-finally statement without the catch part: void writeNullBytesToAFile(int count, String filename) throws IOException { FileOutputStream out = null...

You can bind event listeners to the EventSource object to listen to different events channels using the .addEventListener method. EventSource.addEventListener(name: String, callback: Function, [options]) name: The name related to the name of the channel the server is emitting events to. callb...

make a publisher account add an asset in the publisher account download the asset store tools (from the asset store) go to "Asset Store Tools" > "Package Upload" select the correct package and project folder in the asset store tools window click upload submit your asse...

It is always a good practice to test how push notifications work even before you have your server side ready for them, just to make sure that everything is set up correctly on your side. It is quite easy to send yourself a push notification using a following PHP script. Save the script as a file ...

Save aps.cer to a folder Open "Keychain access" and export the key that is under that certificate to a .p12 file (call it key.p12). To do that right click on it and choose Export. Save it to the same folder as step 1. On export you will be prompted for a password. Make something u...

As seen in previous examples, basic use of this script is: python setup.py install But there is even more options, like installing the package and have the possibility to change the code and test it without having to re-install it. This is done using: python setup.py develop If you want to p...

JAXB can be used to generate classes from an model defined in XSD. It will then be possible to read XML document made against this XSD directly as java instances and inversly save these instances as XML document. Take the following XSD saved in a file named SimpleModel.xsd <?xml version="...

When an application has not been packaged as an executable JAR, you need to provide the name of an entry-point class on the java command line. Running the HelloWorld class The "HelloWorld" example is described in Creating a new Java program . It consists of a single class called HelloWo...

Swift 2.3 let url = NSURL(string: "http://google.com/lastPath") let lastPath = url?.lastPathComponent Swift 3.0 let url = URL(string: "http://google.com/lastPath") let lastPath = url?.lastPathComponent

GET your REST data and store in a PowerShell object: $Post = Invoke-RestMethod -Uri "http://jsonplaceholder.typicode.com/posts/1" Modify your data: $Post.title = "New Title" PUT the REST data back $Json = $Post | ConvertTo-Json Invoke-RestMethod -Method Put -Uri "h...

GET your REST data and store in a PowerShell object: $Users = Invoke-RestMethod -Uri "http://jsonplaceholder.typicode.com/users" Modify many items in your data: $Users[0].name = "John Smith" $Users[0].email = "[email protected]" $Users[1].name = "Jane S...

Identify the item that is to be deleted and delete it: Invoke-RestMethod -Method Delete -Uri "http://jsonplaceholder.typicode.com/posts/1"

Returns average of numeric values in a given column. We have table as shown in figure that will be used to perform different aggregate functions. The table name is Marksheet. Select AVG(MarksObtained) From Marksheet The average function doesn't consider rows with NULL value in the field used ...

Julia's Char type represents a Unicode scalar value, which only in some cases corresponds to what humans perceive as a "character". For instance, one representation of the character é, as in résumé, is actually a combination of two Unicode scalar values: julia> collect("é&quot...