There are some new features in ES6(ECMAScript 2015) like the following. But, we will focus on classes.
letconstArray.find()Array.findIndex()Instance properties must be defined inside of class methods.
Continue readingI already mentioned many details in the following link. So I don't want to duplicate everything in this post one more time.
You can reach github project from the following link.
https://github.com/kenanhancer/babel7-usage.git
You can reach Babel 6.x post from the following link.
.babelrc
{
"presets": [
"@babel/preset-env",
"@babel/preset-react"
],
"plugins": [
"@babel/plugin-transform-runtime"
],
"env": {
"development": {
"presets": [
[
"@babel/preset-react",
{
"development": true
}
]
],
"sourceMaps": true,
"retainLines": true
}
}
}nut-pipe npm package is an implementation of Chain of Responsibility Pattern. We can encapsulate or wrap every aspect of code in separate module or class or function, etc. So that, separated aspect modules would implement Single Responsibility Principle(SRP) and Seperation of Concern Principle(SoC) properly.
🙂 so if you want to implement OOP basics and principles, then you can use nut.pipe npm package.
This design provides to developer clean business logic code. They don't need to think about Error, Exception, Log handling business logic. Before their business logic code is called, pipeline is called and it means first middleware is triggered then first middleware will trigger next one, but no middleware knows about next middleware. Middleware should know about its business logic then should call next one.
I know too much words but developers want to see code 🙂 same code will be developed in different ways.
I wrote a greeting service with sayHello() and sayGoodbye() functions. They include all business logic in their body. This is not good approach definitely. Code duplications are everywhere 🙂 For example, every functions have try/catch, console.log('ENTRY: …'), console.log('SUCCESS: …'), console.log('ERROR: …'), etc. Notice that getFullName doesn't contain these business logics. So, we can't know whether it is called or not. If developer like me 🙂 doesn't write these kind of aspects(logging and exception handling is kind of aspect) then we never understand that that method is called in run-time.
Continue readingAsynchronous functions always return a Promise. So, I added following promise example firstly.
The following three examples are doing same job. I used function statement and arrow function in Promise.
I finally decided to write this post as well. I have collected many information from different links. When I need to remember fundamentals of JavaScript, I spend too much time in google. Because many developers just focused on specific features of JavaScript. In addition to this, different naming conventions are used, even they are mentioning about same topic 🙂
So, this is very very useful post for me. I hope that it will help any developers who need this kinds of collective documentation.
This topic is very very important in javaScript. It is an unknown behavior of javaScript. Shortly, javaScript compiler moves variables and function declarations
Hoisting is JavaScript's default behavior of moving declarations to the top of the current scope.
Variables and constants declared with let or const are not hoisted!
In JavaScript, a variable can be declared after it has been used.
In other words, a variable can be used before it has been declared.
Hoisting applies to variable declarations and to function declarations.
function declarations are hoisted before variable declarations.
Hoisting is only possible with declaration but not the initialization. JavaScript will not move variables that are declared and initialized in a single line.
Continue readingI sometimes try to remember basis of JavaScript Functions. So, I often exercise about it. I followed this link https://www.w3schools.com/js/js_function_definition.asp. I copied some important descriptions from that link. My aim is to follow this post when I need to remember again 🙂
A JavaScript function is a block of code designed to perform a particular task.
A Function is much the same as a Procedure or a Subroutine, in other programming languages.
You can reuse code: Define the code once, and use it many times.
You can use the same code many times with different arguments, to produce different results.
Expose your Oracle Database as a REST service with LoopBack 3 (Node.js Open API Framework)
This post is continuation of previous post. So if you want to start from beginning, read that one as well.
Follow this link to create a Oracle container 🙂
You can find LoopBack 3 project in the following repository. After clonning switch to oracle branch 🙂 or run the following command.
git checkout oracleI just want to see my micro services in a tree view. This is a configurable and flexible D3 Node.js project. In order to achieve this project, I have used D3, Node.js and Parcel (https://parceljs.org). I hope that some one will benefit from this project like me 🙂
Expose your Redis NoSQL as a REST service with LoopBack 3 (Node.js Open API Framework)
This post is continuation of previous post. So if you want to start from beginning, read that one as well.
You can find LoopBack 3 project in the following repository. After clonning switch to mongodb branch 🙂 or run the following command.
git checkout redis