Tutorial by Examples: bas

UIBezierPath using to create a circular path ShapeLayer CAShapeLayer *circleLayer = [CAShapeLayer layer]; [circleLayer setPath:[[UIBezierPath bezierPathWithOvalInRect: CGRectMake(50, 50, 100, 100)] CGPath]]; circleLayer.lineWidth = 2.0; [circleLayer setStrokeColor:[[UIColor redColor] CGColor]];...

The following example demonstrates a simple HTTP GET request. http.get() returns an Observable which has the method subscribe. This one appends the returned data to the posts array. var posts = [] getPosts(http: Http):void { this.http.get(`https://jsonplaceholder.typicode.com/posts`) ...

Sometimes we need preserve whole model and transfer it across actions or even controllers. Storing model at session good solution for this type of requirements. If we combine this with powerful model binding features of MVC we get elegant way of doing so. We can create generic session based model bi...

Analysis of Variance (aov) is used to determine if the means of two or more groups differ significantly from each other. Responses are assumed to be independent of each other, Normally distributed (within each group), and the within-group variances are assumed equal. In order to complete the analys...

The Jekyll gem makes a jekyll executable available to you in your Terminal window. You can use this command in a number of ways: $ jekyll build # => The current folder will be generated into ./_site $ jekyll build --destination <destination> # => The current folder will be generate...

The "listener" or "observer" pattern is the most common strategy for creating asynchronous callbacks in Android development. public class MyCustomObject { //1 - Define the interface public interface MyCustomObjectListener { public void onAction(String ac...

I like to wrap my OkHttp into a class called HttpClient for example, and in this class I have methods for each of the major HTTP verbs, post, get, put and delete, most commonly. (I usually include an interface, in order to keep for it to implement, in order to be able to easily change to a different...

Arithmetic computation can be also done without involving any other programs like this: Multiplication: echo $((5 * 2)) 10 Division: echo $((5 / 2)) 2 Modulo: echo $((5 % 2)) 1 Exponentiation: echo $((5 ** 2)) 25

You will need to set your base URL in application/config/config.php If it is not set, then CodeIgniter will try to guess the protocol and path to your installation, but due to the security concerns the hostname will be set to $_SERVER['SERVER_ADDR'] if available, or localhost otherwise. The auto...

Use "-x" to enable debug output of executed lines. It can be run on an entire session or script, or enabled programmatically within a script. Run a script with debug output enabled: $ bash -x myscript.sh Or $ bash --debug myscript.sh Turn on debugging within a bash script. It may ...

If you need to add custom headers to your volley requests, you can't do this after initialisation, as the headers are saved in a private variable. Instead, you need to override the getHeaders() method of Request.class as such: new JsonObjectRequest(REQUEST_METHOD, REQUEST_URL, REQUEST_BODY, RESP_L...

The dot operator repeats the last action performed, for instance: file test.tx helo, World! helo, David! (cursor at [1][1]) Now perform a cwHello<Esc> (Change Word helo to Hello) Now the buffer looks like that: Hello, World! helo, David! (cursor at [1][5]) After typing j_ the cur...

<svg width="800px" height="600px"> <defs> <filter id="drop-shadow"> <feGaussianBlur in="SourceAlpha" stdDeviation="4"/> <feOffset dx="5" dy="5" result="offsetblur"/> <f...

<svg width="800px" height="600px"> <defs> <filter id="greyscale"> <feColorMatrix type="matrix" values="0.2126 0.7152 0.0722 0 0 0.2126 0.7152 0.0722 0 0 0...

To start a bibliography you need to define your sources. Create a database file (like sources.bib) and include some content: @book{Doe1993, Author = {John Doe}, Publisher = {Earth University}, Title = {Creating a bibliography with biber}, Year = {1993}} You can then include y...

What's an image sprite? An image sprite is a single asset located within an image sprite sheet. An image sprite sheet is an image file that contains more than one asset that can be extracted from it. For example: The image above is an image sprite sheet, and each one of those stars is a sprite...

You'll need to separate out your application layer from your database layer, and that means specifying the MONGO_URL. Which means running your app through the bundle command, uncompressing it, setting environment variables, and then launching the project as a node app. Here's how... #make sure you...

There's two great utilities for black-box analysis of databases. First is variety.js, which will give you a high-level overview. The second is schema.js, which will let you dig into the collections for more detail on the individual fields. When inheriting a production Mongo database, these two util...

The --url flag can be tricky to use. There is a 60 second window to authenticate, and then the username/password randomly resets. So be sure to have robomongo open and ready to configure a new connection when you run the command. # get the MONGO_URL string for your app meteor mongo --url $METEOR...

Same thing as before, but you have to copy the info into the mongodump command. You have to run the following commands rediculously fast, and it requires hand/eye coordination. Be warned! This is a rediculously hacky! But fun! Think of it as a video game! :D # get the MONGO_URL string for your app ...