Tutorial by Examples: co

First, ensure you have installed mongodb and express via npm. Then, in a file conventionally titled db.js, use the following code: var MongoClient = require('mongodb').MongoClient var state = { db: null, } exports.connect = function(url, done) { if (state.db) return done() M...

The following example is high level coverage of the key concepts and basic skeletal setup:- Collects credentials from the user (Usually from a login screen you've created) Authenticates the credentials with the server (stores custom authentication) Stores the credentials on the device Exte...

Rounding Values midway between two integers go toward the nearest even value. - round(4.5); val it = 4 : int - round(3.5); val it = 4 : int Truncation val it = 4 : int - trunc(4.5); val it = 4 : int - trunc(3.5); val it = 3 : int Floor and Ceiling - ceil(4.5); val it = 5 : int - f...

Cannot add Integer and Real* - 5 + 1.0; stdIn:1.2-10.4 Error: operator and operand don't agree [overload conflict] operator domain: [+ ty] * [+ ty] operand: [+ ty] * real in expression: 5 + 1.0

- real(6); val it = 6.0 : real

Say you have a Parent class and a Child class. To construct a Child instance always requires some Parent constructor to be run at the very gebinning of the Child constructor. We can select the Parent constructor we want by explicitly calling super(...) with the appropriate arguments as our first Chi...

Create managed bean To create a manage bean you need the annotation @ManagedBean for example: @ManagedBean public class Example {} You need the package: import javax.faces.bean.ManagedBean; Managed bean Scope We use annotations to define the scope in which the bean will be stored. There...

To add a code block, surround it with #+BEGIN_SRC language and #+END_SRC. language should correspond to the major mode for the language in question, e.g. the major mode for Emacs Lisp is emacs-lisp-mode, so write #+BEGIN_SRC emacs-lisp. #+BEGIN_SRC emacs-lisp (defun hello-world () (interactive)...

Introduction Sometimes migrations conflict, resulting in making the migration unsuccesful. This can happen in a lot of scenerio's, however it can occur on a regular basis when developing one app with a team. Common migration conflicts happen while using source control, especially when the feature-...

All communications between Fragments must go via an Activity. Fragments CANNOT communicate with each other without an Activity. Additional Resources How to implement OnFragmentInteractionListener Android | Communicating With Other Fragments In this sample, we have a MainActivity that hosts t...

// Must enable the feature to use associated constants #![feature(associated_consts)] use std::mem; // Associated constants can be used to add constant attributes to types trait Foo { const ID: i32; } // All implementations of Foo must define associated constants // unless a defaul...

There are very good configurations to force typings and get more helpful errors which are not activated by default. { "compilerOptions": { "alwaysStrict": true, // Parse in strict mode and emit "use strict" for each source file. // If you have wrong c...

You can configure the database settings in config/connections.js. Example: someMongoDb: { adapter: 'sails-mongo', host: 'localhost', // defaults to `localhost` if omitted port: 27017, // defaults to 27017 if omitted user: 'username_here', // or omit if not relevant password: 'passwo...

Step one We need to create a service called jwToken. Go to api/services directory and create jwToken.js. 'use strict'; const jwt = require('jsonwebtoken'), tokenSecret = "secretissecret"; module.exports = { // Generates a token from supplied payload issue(payload) { ...

You can add partial mask on the column that will show few characters from te beginning and the end of the string and show mask instead of the characters in the middle: ALTER TABLE Company ALTER COLUMN Phone ADD MASKED WITH (FUNCTION = 'partial(5,"XXXXXXX",2)') In the parameters of th...

If you add default mask on the column, instead of actual value in SELECT statement will be shown mask: ALTER TABLE Company ALTER COLUMN Postcode ADD MASKED WITH (FUNCTION = 'default()')

You can grant in-privileged users right to see unmasked values using the following statement: GRANT UNMASK TO MyUser If some user already has unmask permission, you can revoke this permission: REVOKE UNMASK TO MyUser

Introduction Texas Instruments' (TI) CC26XX series SoCs are readily available wireless MCUs targeting Bluetooth Low Energy (BLE) applications. Along with the MCUs, TI offers a full-fledged software stack that provides necessary API and sample codes to help quickly get developers started with the to...

SVN FreeBSD project use SVN as default SCM. Source could be download with svnlite software. Get Current cd /usr/src svnlite checkout https://svn.freebsd.org/base/head . Get Releases cd /usr/src svnlite checkout https://web.freebsd.org/base/release/11.0.0 . Tarball (http & ftp) You c...

Go to the directory with the source code: cd freebsdsrc Go to the directory with the kernel's configuration code: # If your system is 32-bit. cd sys/i386/conf/ # If your system is 64-bit. cd sys/amd64/conf/ Get a copy of the GENERIC kernel (let's call it MODEDKERNEL). It will ...