Aurelie  Block

Aurelie Block

1594081971

JavaScript forEach Loop Tutorial with Example

Learn the usage of the forEach( ) method for looping through arrays in JavaScript.

#javascript

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JavaScript forEach Loop Tutorial with Example
Ida  Nader

Ida Nader

1599099600

How to Use If-Else Statements and Loops in R – Dataquest

When we’re programming in R (or any other language, for that matter), we often want to control when and how particular parts of our code are executed. We can do that using control structures like if-else statements, for loops, and while loops.

Control structures are blocks of code that determine how other sections of code are executed based on specified parameters. You can think of these as a bit like the instructions a parent might give a child before leaving the house:

“If I’m not home by 8pm, make yourself dinner.”

Control structures set a condition and tell R what to do when that condition is met or not met. And unlike some kids, R will always do what we tell it to! You can learn more about control structures in the R documentation if you would like.

In this tutorial, we assume you’re familiar with basic data structures, and arithmetic operations in R.

Not quite there yet? Check out our Introductory R Programming course that’s part of our Data Analyst in R path. It’s free to start learning, there are no prerequisites, and there’s nothing to install — you can start learning in your browser right now.

install.packages(“Dataquest”)

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(This tutorial is based on our intermediate R programming course, so check that out as well! It’s interactive and will allow you to write and run code right in your browser.)

Comparison Operators in R

In order to use control structures, we need to create statements that will turn out to be either TRUE or FALSE. In the kids example above, the statement “It’s 8pm. Are my parents home yet?” yields TRUE (“Yes”) or FALSE (“No”). In R, the most fundamental way to evaluate something as TRUE or FALSE is through comparison operators.

Below are six essential comparison operators for working with control structures in R:

  • == means equality. The statement x == a framed as a question means “Does the value of x equal the value of a?”
  • != means “not equal”. The statement x == b means “Does the value of x not equal the value of b?”
  • < means “less than”. The statement x < c means “Is the value of x less than the value of c?”
  • <= means “less than or equal”. The statement x <= d means “Is the value of x less or equal to the value of d?”
  • > means “greater than”. The statement x > e means “Is the value of x greater than the value of e?”
  • >= means “greater than or equal”. The statement x >= f means “Is the value of xgreater than or equal to the value of f?”

#data science tutorials #beginner #for loop #for loops #if #if else #learn r #r #r tutorial #rstats #tutorial #tutorials #while loop #while loops

Lowa Alice

Lowa Alice

1624406400

JavaScript Loops Tutorial

JavaScript loops made simple.

📺 The video in this post was made by Programming with Mosh
The origin of the article: https://www.youtube.com/watch?v=s9wW2PpJsmQ&list=PLTjRvDozrdlxEIuOBZkMAK5uiqp8rHUax&index=8
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Thanks for visiting and watching! Please don’t forget to leave a like, comment and share!

#javascript #loops #javascript loops #javascript loops tutorial

Terry  Tremblay

Terry Tremblay

1602147513

Now Learn JavaScript Programming Language With Microsoft

icrosoft has released a new series of video tutorials on YouTube for novice programmers to get a hands-on renowned programming language — JavaScript.

This isn’t the first attempt by Microsoft to come up with video tutorials by beginner programmers. The company also has a series of YouTube tutorials on Python for beginners.

For JavaScript, Microsoft has launched a series of 51 videos as ‘Beginner’s Series to JavaScript,’ for young programmers, developers and coders who are interested in building browser applications using JavaScript. These video tutorials will also help programmers and coders to use relevant software development kits (SDKs) and JavaScript frameworks, such as Google’s Angular.


“Learning a new framework or development environment is made even more difficult when you don’t know the programming language,” stated on the Microsoft Developer channel on YouTube. “Fortunately, we’re here to help! We’ve created this series of videos to focus on the core concepts of JavaScript.”

It further stated — while the tutorials don’t cover every aspect of JavaScript, it indeed will help in building a foundation from which one can continue to grow. By the end of this series, Microsoft claims that the novice programmers will be able to work through tutorials, quick starts, books, and other resources, continuing to grow on their own.


#news #javascript #javascript tutorial #javascript tutorials #microsoft tutorials on javascript

Coy  Roberts

Coy Roberts

1600679940

Javascript Array forEach() Method Example

Javascript array foreach is an inbuilt function that can be used to execute a function on each item in the array. The forEach() method is called on the array Object and is passed the function that is called on each item in the array.  The  callback function can also take the second parameter of the index in case you need to reference the index of the current element in the array.

Understanding Javascript Array forEach

In a nutshell, Javascript forEach() method executes a provided function once for each array element. Javascript forEach only be used on the Arrays, Maps, and  Sets. This article briefly describes how to use the forEach() method to iterate the items of the array in JavaScript.

What’s the usual thing you do with an  array? Add or remove items from an array. Iterate through its items! This is where the forEach() array method shines.

Before we dive into seeing how forEach() works, we need to take a look at how looping works. Looping is a fundamental computer science concept. If you want to be a sound programmer, mastering loops are amidst the first steps you need to take.

Here’s an example of a for loop in Javascript.

let languages = ['Python', 'Javascript', 'PHP', 'Golang'];

for (i = 0; i < languages.length; i++) {
  console.log(languages[i])
}

#javascript #javascript array foreach #javascript foreach

wp codevo

wp codevo

1608042336

JavaScript Shopping Cart - Javascript Project for Beginners

https://youtu.be/5B5Hn9VvrVs

#shopping cart javascript #hopping cart with javascript #javascript shopping cart tutorial for beginners #javascript cart project #javascript tutorial #shopping cart