Tutorial by Examples: od

This will be a relatively comprehensive tutorial of how to write a command line tool to print the weather from the zip code provided to the command line tool. The first step is to write the program in ruby to do this action. Let's start by writing a method weather(zip_code) (This method requires the...

First, you need to install pry-byebug gem. Run this command: $ gem install pry-byebug Add this line at the top of your .rb file: require 'pry-byebug' Then insert this line wherever you want a breakpoint: binding.pry A hello.rb example: require 'pry-byebug' def hello_world puts &qu...

Avoid calling methods using strings that can accept methods. This approach will make use of reflection that can slow down your game especially when used in the update function. Examples: //Avoid StartCoroutine with method name this.StartCoroutine("SampleCoroutine"); //Ins...

Avoid empty unity methods. Apart from being bad programming style, there is a very small overhead involved in runtime scripting. Over many instances, this can build up and affect performance. void Update { } void FixedUpdate { }

This is a bare minimum setup for MySQL servers using InnoDB tables. Using InnoDB, query cache is not required. Reclaim disk space when a table or database is DROPed. If you're using SSDs, flushing is a redundant operation (SDDs are not sequential). default_storage_engine = InnoDB query_cache_type ...

PS> $LastExitCode PS> $? PS> $Error[0] These are built-in PowerShell variables that provide additional information about the most recent error. $LastExitCode is the final exit code of the last native application that was executed. $? and $Error[0] is the last error record that was gene...

Some WMI Classes expose Methods that allow you to do something with that object. For example, the Win32_Printer class has 11 methods for interacting with a printer, one of which is the PrintTestPage method. The following code demonstrates how to select a specific printer and print a test page. 'Spe...

To create a node, you first need to have a hub. If you don't have a hub, you can create it like this: java -jar selenium-server-standalone-<version>.jar -role hub Then you're able to create a node: java -jar selenium-server-standalone-<version>.jar -role node -hub http://localhost:4...

here countInstance is a static class variable class StaticTest{ static countInstance : number= 0; constructor(){ StaticTest.countInstance++; } } new StaticTest(); new StaticTest(); console.log(StaticTest.countInstance);

Best way to connect amazon redshift using JDBC , Use proper driver as per version http://docs.aws.amazon.com/redshift/latest/mgmt/configure-jdbc-connection.html Step-1: npm install jdbc Step-2: var JDBC = require('jdbc'); var jinst = require('jdbc/lib/jinst'); // isJvmCreated will be true afte...

If you installed Node using the default directory, while in the global mode, NPM installs packages into /usr/local/lib/node_modules. If you type the following in the shell, NPM will search for, download, and install the latest version of the package named sax inside the directory /usr/local/lib/node...

When we refer the module in the code, node first looks up the node_module folder inside the referenced folder in required statement If the module name is not relative and is not a core module, Node will try to find it inside the node_modules folder in the current directory. For instance, if you do...

Some of the queryFor* methods available in JdbcTemplate are useful for simple sql statements that perform CRUD operations. Querying for Date String sql = "SELECT create_date FROM customer WHERE customer_id = ?"; int storeId = jdbcTemplate.queryForObject(sql, java.util.Date.class, custom...

One day I had a conversation with a friend of mine who uses Laravel PHP framework in his job. When I told him that Django has its own all-included HTML CRUD system, for interacting with the database, called Django admin, his eyes popped off! He told me: "It took me months to build an Admin inte...

Supervision and Monitoring

Applications running in non-development environments often require database updates. After using the Add-Migration command to create your database patches there's the need to run the updates on other environments, and then the test environment as well. Challenges commonly faced are: no Visual S...

Let say you want to build your API to comply jsonapi.org specification and the result should look like: { "article": { "id": "305", "type": "articles", "attributes": { "title": "Asking Alexandria&q...

from pymongo import MongoClient uri = "mongodb://localhost:27017/" client = MongoClient(uri) db = client['test_db'] # or # db = client.test_db # collection = db['test_collection'] # or collection = db.test_collection collection.save({"hello":"world"...

"Fat Model, Skinny Controller" is a very good first step, but it doesn't scale well once your codebase starts to grow. Let's think on the Single Responsibility of models. What is the single responsibility of models? Is it to hold business logic? Is it to hold non-response-related logic? ...

app/controllers/myname.js app/templates/myname.hbs app/routes/myname.js app/models/myname.js Using pods, the example above would translate into this: app/myname/controller.js app/myname/template.hbs app/myname/route.js app/myname/model.js