Tutorial by Examples: u

You can use the $q.all function to call a .then method after an array of promises has been successfully resolved and fetch the data they resolved with. Example: JS: $scope.data = [] $q.all([ $http.get("data.json"), $http.get("more-data.json"), ]).then(funct...

The $q constructor function is used to create promises from asynchronous APIs that use callbacks to return results. $q(function(resolve, reject) {...}) The constructor function receives a function that is invoked with two arguments, resolve and reject that are functions which are used to eithe...

var pug = require('pug'); // compile var fn = pug.compile('string of pug', options); var html = fn(locals); // render var html = pug.render('string of pug', merge(options, locals)); // renderFile var html = pug.renderFile('filename.pug', merge(options, locals)); Options filename U...

When using C#'s inbuilt lock statement an instance of some type is needed, but its state does not matter. An instance of object is perfect for this: public class ThreadSafe { private static readonly object locker = new object(); public void SomeThreadSafeMethod() { lock (locker) { ...

Ubuntu Below are detailed instructions to install Caffe, pycaffe as well as its dependencies, on Ubuntu 14.04 x64 or 14.10 x64. Execute the following script, e.g. "bash compile_caffe_ubuntu_14.sh" (~30 to 60 minutes on a new Ubuntu). # This script installs Caffe and pycaffe. # CPU onl...

If you want to provide a URL out of convenience for your user but map it directly to another one you're already using. Use a redirect: # config/routes.rb TestApp::Application.routes.draw do get 'courses/:course_name' => redirect('/courses/%{course_name}/lessons'), :as => "course&quot...

To create an albums collection, add the following to your config.yml file: collections: - albums Create a corresponding folder at the root of your Jekyll install, named exactly what you put in your config.yml file with an additional prepended underscore; in our example, <source>/_albums....

Microcontrollers use pins to interact with the rest of the circuit. These pins will usually be one of input / output pins, vin or ground. I/O pins can be simple digital I/O pins, or they can have some special carachteristics like being able to vary the voltage of their output using pulse width modul...

Every time a program opens a resource, such as a file or network connection, it is important to free the resource once you are done using it. Similar caution should be taken if any exception were to be thrown during operations on such resources. One could argue that the FileInputStream has a finaliz...

This example is about deliberately ignoring or "squashing" exceptions. Or to be more precise, it is about how to catch and handle an exception in a way that ignores it. However, before we describe how to do this, we should first point out that squashing exceptions is generally not the co...

This exception occurs when a collection is modified while iterating over it using methods other than those provided by the iterator object. For example, we have a list of hats and we want to remove all those that have ear flaps: List<IHat> hats = new ArrayList<>(); hats.add(new Ushanka...

pip is your friend when you need to install any package from the plethora of choices available at the python package index (PyPI). pip is already installed if you're using Python 2 >= 2.7.9 or Python 3 >= 3.4 downloaded from python.org. For computers running Linux or another *nix with a native...

The basic math operations are performed mainly on numbers or on vectors (lists of numbers). 1. Using single numbers We can simple enter the numbers concatenated with + for adding and - for subtracting: > 3 + 4.5 # [1] 7.5 > 3 + 4.5 + 2 # [1] 9.5 > 3 + 4.5 + 2 - 3.8 # [1] 5.7 >...

Amp harnesses Promises [another name for Awaitables] and Generators for coroutine creation. require __DIR__ . '/vendor/autoload.php'; use Amp\Dns; // Try our system defined resolver or googles, whichever is fastest function queryStackOverflow($recordtype) { $requests = [ Dns\qu...

In vc.h @interface vc : UIViewController<UIWebViewDelegate> in vc.m - (BOOL)webView:(UIWebView *)webView shouldStartLoadWithRequest:(NSURLRequest *)request navigationType:(UIWebViewNavigationType)navigationType{ if (navigationType == UIWebViewNavigationTypeLinkClicked){...

Dependency on Guava can be added in your Java project by using any build system. Maven: <dependency> <groupId>com.google.guava</groupId> <artifactId>guava</artifactId> <version>19.0</version> </dependency> Gradle: dependencies { comp...

In C++, a byte is the space occupied by a char object. The number of bits in a byte is given by CHAR_BIT, which is defined in climits and required to be at least 8. While most modern systems have 8-bit bytes, and POSIX requires CHAR_BIT to be exactly 8, there are some systems where CHAR_BIT is great...

There are two possible ways to pass a value type by reference: ref and out. The difference is that by passing it with ref the value must be initialized but not when passing it with out. Using out ensures that the variable has a value after the method call: public void ByRef(ref int value) { C...

curl -XGET http://www.example.com:9200/myIndexName/_search?pretty=true&q=*:* This uses the Search API and will return all the entries under index myIndexName. Reference Link: Here

Suppose we have a json ： { "total_count": 132, "page_size": 2, "page_index": 1, "twitter_posts": [ { "created_on": 1465935152, "tweet_id": 210462857140252672, "tweet": "Along with our ne...