teleren/devto huggingface dataset:
Advanced Machine Learning Interview Questions 
Tags: machinelearning, interviewquestions
Published: 2021-02-06 15:13:40

If you're looking for Machine Learning Interview Questions for Freshers and Experienced, you are in the right place. There are a lot of opportunities from many reputed companies in the world. According to research Machine Learning has a market size of about USD 3,682 Million by 2021. So, You still have the opportunity to move ahead in your career in Machine Learning Development. Mindmajix offers Advanced Machine Learning Interview Questions 2021 that helps you in cracking your interview & acquire dream career as Machine Learning Developer.

Q1) What is the difference between Bias and Variance?

Ans: Bias:
Bias can be defined as a situation where an error has occurred due to the use of assumptions in the learning algorithm.

Variance:
Variance is an error caused because of the complexity of the algorithm that is been used to analyze the data.

Q2) What is the difference between supervised and unsupervised machine learning?

Ans: Supervised learning is a process where it requires training labeled data. When it comes to Unsupervised learning it doesn’t require data labeling.

Q3) What are the three stages of model building in the machine learning?
Ans: Following are the three stages of model building:

Model Building

In this stage, we will choose the ideal algorithm for the model, and we will train it based on our requirement.

Model Testing

In this stage, we will check the model accuracy by using test data.

Applying Model

After testing, we have to make the changes, and then we can use the model for the real-time projects.

Q4) What are the applications of supervised machine learning?
Ans: Following are the applications of machine learning:

Fraud Identification

Supervised learning trains the model for identifying the suspicious patterns; we can identify the feasible fraud instances.

Healthcare

By giving the images about a disease, supervised machine learning can train the model for detecting whether a person is affecting from illness or not.

Email spam identification

We train the model through historical data which contains emails that are classified as spam or not spam. This labeled data is supplied as the input to the model.

Sentiment Analysis

This relates to the process of using algorithms for mining the documents and determining if they are negative, neutral, positive in sentiment.

Q5) What are the techniques of Unsupervised machine learning?
Ans: Following are the different techniques of unsupervised machine learning:

Clustering

It includes the data that must be divided into the subsets. These subsets are also known as clusters. Diverse clusters disclose details about objects, unlike regression or classification.

Association

In the association problem, we can recognise the association patterns between different items and variables. For instance, the e-commerce can indicate other items for us to buy according to our previous purchases.

Visit Here to read more: https://mindmajix.com/machine-learning-interview-questions
How to fill out and submit forms with Cypress
Tags: cypress, testing, automtion, e2e
Published: 2021-02-06 14:47:46

## Welcome to the “Pinches of Cypress” series! 🧂

In this series of content in text format with code snippets, you will learn several tricks of the automated testing framework [**Cypress.io**](https://cypress.io), to make your life easier when writing test scripts.

I will start with something simple, and we will evolve throughout the series, okay?

Let's say you are testing an application that sells event tickets.

In this example application, for a user to buy a ticket, he must fill in some mandatory data, and after submitting the form, he will receive a success message.

Let's say that the mandatory fields are as follows:

* Full name
* Email
* Checkbox that you agree to the terms of service

Let's also imagine that the elements above have unique IDs.

The test would look something like this:

```js
describe('Online tickets selling app', () => {
  beforeEach(() => {
    cy.visit('https://example.com/tickets')
  })

  it('successfully orders a ticket', () => {
    cy.get('#fullName')
      .should('be.visible')
      .type('John Doe')
    cy.get('#email')
      .should('be.visible')
      .type('john-doe@example.com')
    cy.get('#iAgree')
      .should('be.visible')
      .check()
    cy.get('button[type="submit"]')
      .should('be.visible')
      .click()

    cy.contains('You will receive an email to finish the purchase.')
      .should('be.visible')
  })
})
```

Note that before typing (`type`), checking (`check`), or clicking on elements (`click`), I am ensuring that they are visible (`.should('be.visible')`). This makes the test more robust.

Finally, I verify that the text "**You will receive an email to finalize your purchase**" is contained in some element and is visible.

That's it!

I hope you enjoyed it, and stay tuned for the next content in the series. 👋

___

This post was originally published in Portuguese on the [**Talking About Testing**](https://talkingabouttesting.com/2021/02/05/como-preencher-e-submeter-formularios-com-cypress/) blog.
___

Would you like to learn about **test automation with Cypress**? Get to know my online courses on [**Udemy**](https://udemy.com/user/walmyr).
Day 7: Poker ID
Tags: 100daysofcode, python
Published: 2021-02-06 14:08:09

Identify a hand in poker.

```python
#!/usr/bin/python3

def determine_hand(hand):
    card_value = dict(zip('2 3 4 5 6 7 8 9 T J Q K A'.split(), range(14)))

    cards = []
    suits = []

    for card in hand.split():
        c, s = list(card)
        cards.append(c)
        suits.append(s)

    max_suit = max([suits.count(a) for a in suits])
    same_cards = sorted([cards.count(a) for a in set(cards)])
    card_nums = sorted([card_value[a] for a in cards])

    def is_straight(cv):
        diff = cv[-1] - cv[0]
        if diff == 4:
            return True
        elif diff == 12:
            if cv[-2] - cv[0] == 3:
                return True
        return False

    # We have our flushes in here. Any less suits and we don't care.
    if max_suit == 5:
        if is_straight(card_nums):
            if card_nums[0] == 8: # ROYAL FLUSH!!!
                return "Royal Flush"
            return "Straight Flush"
        return "Flush"

    # Checking in on our same cards
    # With a length of two we either have two pair or a full house
    elif len(same_cards) == 2:
        if max(same_cards) == 4: # Four of a Kind
            return "Four of a Kind"
        elif max(same_cards) == 3: # Full House
            return "Full House"
    elif len(same_cards) == 3:
        if max(same_cards) == 3: # Three of a kind
            return "Three of a Kind"
        else: # Two pair
            return "Two Pair"
    elif len(same_cards) == 4:
        return "One Pair"
    else: # Garbage hand most likely. But maybe a straight!
        if is_straight(card_nums):
            return "Straight"
        return "High Card"

if __name__ == "__main__":
    hands = ["TS JS QS KS AS", # Royal Flush
             "AC 2C 3C 4C 5C", # Straight Flush
             "AC AS 3C AD AH", # Four of a Kind
             "TC 2C 2H TS TH", # Full House
             "AH 5H TH 7H 4H", # Flush
             "3D 4C 5H 6C 7D", # Straight
             "3D 3C 3S 5H AD", # Three of a Kind
             "3D 3C 5H 5S 7D", # Two Pair
             "3D 3C 5H 8S 7D", # One Pair
             "AC 3C 4H 7S 2D"] # High Card Garbage

    for hand in hands:
        print ("With a hand of {}, Bob has a {}!".format(hand, determine_hand(hand)))
```
Google Search and YouTube are too smart. What are more open-minded alternatives?
Tags: discuss, help, privacy, searchengine
Published: 2021-02-06 13:35:28

I can use DuckDuckGo by default, if I don't want tracking, or being too smart; but about videos or news?

Furthermore, I am Thai; but I also prefer contents to be in **English**, or at least, not bent by internal politics. Will try to learn **Chinese** or some other languages, if I can...
E-Commerce Product Card using HTML & CSS
Tags: ecommercecard, productcard, htmlcss, productpage
Published: 2021-02-06 13:25:02

Hello Guys, Today in this blog I'm going to create an Ecommerce Product Card using HTML & CSS. Earlier blog I have shared <a href="https://www.codinglabweb.com/2021/02/how-to-make-calculator-using-html-css.html">How to Make Glassmorphism Calculator using HTML CSS & JavaScript</a> and this time to make CSS product card.

In simple language, product cad means the card of product that is used to promote the specific product on the webpage. This is also called an e-commerce product card. There are various types of products we can found on the internet with different designs.

As you can see on the given image of this program [E-Commerce Product Card ], This is the product card of the camera which name is Sony. The pink quarter circle of this card makes this card design more eye-catchy. The color combination of the button and star rating makes the design more awesome isn't it?

You Might Like This:
<a href="https://www.codinglabweb.com/2020/12/create-website-in-html-css-only-design.html">Simple Website Design</a>
<a href="https://www.codinglabweb.com/2021/01/responsive-website-with-html-css-glass.html">Glassmorpism Website Design</a>
<a href="https://www.codinglabweb.com/2020/12/product-card-design-using-html-css.html">Simple Product using HTML & CSS</a>
<a href="https://www.codinglabweb.com/2020/12/responsive-profile-cards-using-html-css.html">Responsive Profile Car using HTML CSS</a>

E-Commerce Website Design [Source Code]
You can download all source code from the given link. <a href="https://www.codinglabweb.com/2021/02/ecommerce-product-card-using-html-css.html">Click Here To Download All Source Code</a>
Daily Developer Jokes - Saturday, Feb 6, 2021
Tags: jokes, dailydeveloperjokes
Published: 2021-02-06 13:00:02

---
title: "Daily Developer Jokes - Saturday, Feb 6, 2021"
description: "Check out today's daily developer joke! (a project by Fred Adams at xtrp.io)"
series: "Daily Developer Jokes"
cover_image: "https://private.xtrp.io/projects/DailyDeveloperJokes/thumbnail_generator/?date=Saturday%2C%20Feb%206%2C%202021"
published: true
tags: #jokes, #dailydeveloperjokes
---

Generated by Daily Developer Jokes, a project by [Fred Adams](https://xtrp.io/) ([@xtrp](https://dev.to/xtrp) on DEV)

___Read about Daily Developer Jokes on [this blog post](https://xtrp.io/blog/2020/01/12/daily-jokes-bot-release/), and check out the [Daily Developer Jokes Website](https://dailydeveloperjokes.github.io/).___
### Today's Joke is...
![Joke Image](https://private.xtrp.io/projects/DailyDeveloperJokes/public_image_server/images/5e125970d9ec2.png)

---
*Have a joke idea for a future post? Email ___[xtrp@xtrp.io](mailto:xtrp@xtrp.io)___ with your suggestions!*

*This joke comes from [Dad-Jokes GitHub Repo by Wes Bos](https://github.com/wesbos/dad-jokes) (thank you!), whose owner has given me permission to use this joke with credit.*

<!-- 
Joke text:
___Q:___ What is a pirate's favorite programming language?

___A:___ You'd think it was R, but a pirate's first love is Objectively C.
 -->
See your project stats! 
Tags: reactnative, android, git, npm
Published: 2021-02-06 12:55:56

Hi fells!
Lately, I've been working hard on a lot of personal projects to boost my appearances in GitHub and the software development world (and mostly, reach success in my projects over GitHub), so I was drastically developing projects day and night to get stuff done.

## Main issue
Because I have a lot of projects I work on (while most of them are also NPM packages) it was hard for me to follow on all of them regarding downloads/stars/forks and such.

## How I solved it
I developed an Android app called <a href='https://play.google.com/store/apps/details?id=com.gitstats'>Git Stats</a>, this gave me the ability to make it easier and quicker to access my projects information!

## Key features
1. Ability to find GitHub projects
2. Ability to open GitHub projects information (stars, forks, npm statistics)
3. Ability to save projects in bookmarks for easier & quicker access.

I'd be happy to hear your thoughts on the app! please be there to share if you like it! feel free to give it some :star: if you think I did a good job! I hope I helped you as well~
why Django loss it's dependencies.
Tags: django, react, docker
Published: 2021-02-06 12:53:43

I made a few django+react websites before. But, they work very fine for a while and later after I run few git commits and many other change the Django backend start showing errors like " there is no module named Django" or "there is no module named django-allauth" despite I installed all of them before and the website was working very well.
Could that be because of the environment? what if I used docker could it help to prevent such things? or it may be a problem with code only?
Multipurpose tables as CRM and to-do lists
Tags: webdev, javascript, beginners, datascience
Published: 2021-02-06 12:32:50

Most of you know CRM by the many advanced tools out there such as Salesforce, Capterra and Hubspot. But millions of small companies still use Excel/Word/Files/Directories to manage their accounts, invoices and projects. I have met very few individual contractors who use productivity tools/apps, even simple things like notepad apps to record customer requests and issues. Even fewer apply basic CRM practices to stay in touch with their customers, such as keeping their contact details and/or sending out promotional emails.

I understand that for many businesses it may seem like a lot of overhead with little or no immediate value. But some of these do wish to grow and expand their operations, thus seek low-cost solutions.

Since I started the [PyCRM](https://github.com/healzer/PyCRM) project I have been thinking of very simple yet effective ways of doing CRM. Since every business is different, everyone wants a slightly different interface, customization is key.

I remembered that there are many Javascript libraries that provide customizable tables/forms. In addition many of these use very simple data structures which can easily be serialized as JSON and stored as a file without using a complex (No)SQL database.

![Alt Text](https://dev-to-uploads.s3.amazonaws.com/i/4u41lhro1l9tb341ccko.png)

In the latest addition to our [PyCRM](https://github.com/healzer/PyCRM) project, we can use the JS Tabulator library which provides this functionality. You can easily customize the columns, fields and hundreds of other features.

Since it's a SaaS page, it works pretty well on mobile devices. You can use it anywhere as long as you have an internet connection. The save button saves any changes on the server. 

This is a very basic implementation, so be very careful when it is used by multiple people at once. When multiple people save then only ones' version will be stored, the other changes will be overridden and lost.

An improved implementation would be to commit individual fields instead of the entire dataset. But also keep any changes automatically synced over all active users. Once again this isn't difficult to implement but depends on whether you need it or not.

Apart from using this as a CRM, you can turn this into a simple project management tool, or a to-do list or a sales tracking tool, etc. Enjoy!
Stop touching the DOM, damn it!
Tags: javascript, dom, performance, html
Published: 2021-02-06 12:21:23

# DOM operations are expensive.

Leaving the DOM alone is a big topic in JavaScript optimization. The classic example is appending an array of list items: if you append each of these to the DOM individually, it is considerably slower than appending them all at once.
# Reflow
DOM operations are resource-heavy because of reflow. Reflow is basically the process by which the browser re-renders the DOM elements on the screen. For instance, if you change the width of a div with JavaScript, the browser has to refresh the rendered page to account for this change. Meaning every time you change something on the DOM with javascript the whole page will be rerendered, and you can avoid this by using, documentFragment.
#  documentFragment         
You can view this as a container holding all the node elements that you want to add to the DOM. You store them on this "container" and after you have finished all the changes that you want, you append that container to the DOM. Imagine if you wanted to add 100 div tags if you append them directly the browser would have to rerender the page 100 times, expensive, but if you use documentFragment the browser would need to render only once.   
Do you go to the store 100 times to buy 100 things, or do you buy them all at once?



## Example

```bash
Before

var trash = document.getElementById("trash");
// ... Modify trash
document.getElementById("target").appendChild(trash);
After

var trash = document.getElementById("trash");
var frag = document.createDocumentFragment();
frag.appendChild(trash);
// ... Modify trash
document.getElementById("target").appendChild(frag.cloneNode(true));
```

## Conclusion

The speed improvements might not be so obvious on browsers, as modern computers are so powerful, but javascript does not run only on modern and powerful devices. I develop applications for smartTV-s at my current job, using HTML, CSS, JS, the performance impact it had on the old model of TV-s is subsectional. I had to make changes to a library we were using to implement this behavior, the results were good for me and I thought to share it with others.

Thank You!

PS: this is my first blog post :P
CSS Combinator Selectors
Tags: css, webdev, uiweekly, design
Published: 2021-02-06 11:49:54

### .abc.xyz
> Chained Class Selector : will select elements that have both class names.
```
.nav__item.selected {
   color : #fff;
}
```


### .abc .xyz
> Descendant Selector : will select all matching elements inside parent element.
```
.div img {
   width : 100%;
}
```

### .abc > .xyz
> Direct Descendant Selector : will select only direct children of the parent and ignore elements that are nested further.
```
.nav > .li {
   font-size : 2rem;
}
```

###<br> .abc + .xyz
> Adjacent Sibling Selector : will select first element immediately preceded by the former element.
```
.list-item + .list-item {
   color : #3254a8;
}
```

### .abc ~ .xyz
> General Sibling Selector : will select all sibling elements on the same level.
```
.container ~ p {
   font-size : 2rem;
}
```
<br>_Save it_. Its time to show your CSS skills! 

<br/>
Connect with me : [Github](https://github.com/deyRupak) | [Tutoring](https://www.fiverr.com/share/V763ld) | [Freelance Web Dev](https://www.fiverr.com/share/Rld9Y8)
I want to be a web developer #newbie_wannaBe_Apro
Published: 2021-02-06 11:34:56

I'm totally beginner in the programming world. I'm a mechanical engineer of 2018 batch and want to change my tread. I have done some basic learning of frontend web dev in past 3 months and I have come here in search of a programmer like myself (self-taught {begineer or advance programmer}) so that I can learn more about the programming world, learn new skills and learn something new from you guys. My purpose in coming here is that I can do Communicative & Competitive Programming. :)
When are you ready to learn a new language?
Tags: learning
Published: 2021-02-06 11:29:22

I have that question anytime I think to start learning another programming language. Maybe I'm not ready yet, I have to fully master the one I'm using now in order to start a new one. Which makes sense, If you have only 1 year or 2 coding in that language is probably a good idea to stick to the language you are using an become really good at it. But the time pass and you in some way postpone learning  the new one. The idea of learning and using a  new language is exciting but the feeling you will get overwhelm by it eats you from the inside.

Perfectionism is an issue we have to deal. You don't have to be perfect to do something, and perfect does not exist. The average person never thinks is ready or that know fully a subject, even if you think they are very good at it, and they too, but the fact they are learning is more exciting than the one of knowing all about a subject, they will just tell you they are learning. 

Just don't over think it, start what you want to learn now, and give you permission to be a beginner and a amateur on it.
What Is The Actual Meaning of Data Analytics Services?
Tags: devops
Published: 2021-02-06 11:21:36

Data analytics is the study of breaking down raw information to make decisions about that data. A considerable lot of the strategies and [processes of data analytics services](https://www.sonata-software.com/platformation-services/data-analytics) have been automated into mechanical cycles and algorithms that work over crude information for human utilization.


Data analytics solutions can uncover the latest trends and measurements that would somehow be lost in the mass of data. This data would then be able to be utilized to optimize processes to expand the general effectiveness of a business or system.

![Alt Text](https://dev-to-uploads.s3.amazonaws.com/i/hfa8ab3g9voflnkcjp8v.png)


<b>Understanding of Data And Analytics</b>


Data analytics is a wide term that envelops numerous types of data analysis. Any sort of data can be exposed to data analytics companies to get an understanding that can be utilized to improve things. 

For instance, manufacturing organizations frequently record the runtime, downtime, and work line for different machines and afterward analyze the data to come out with a better plan to manage workloads.

Data analytics can do significantly more than point out bottlenecks underway. Gaming organizations use data analytics solutions to set prize timetables for players that keep most of the players active in the game. Content organizations utilize large numbers of the same data analytics to keep you clicking, viewing, or re-arranging content to get another view or another click.



<b>Why Data Analytics Matters?</b>


Data Analytics Services is significant on the grounds that it assists organizations by improving their performance. Applying it into the plan of action implies organizations can help diminish costs by distinguishing more proficient ways of working together and by putting away a lot of information.

An organization can likewise utilize [data analytics](https://www.investopedia.com/terms/d/data-analytics.asp) to settle on better business choices and help examine customer behavior patterns and fulfillment, which can prompt new—and better—products and services. 

Certain sectors have successfully adopted the tactics of data and analytics to improve their service. The list of digitally advanced sectors includes; travel and hospitality industry, health industry, where turnarounds can be quick.

Medical care combines the utilization of high volumes of organized and unorganized data and utilizes data analytics to make decisions on speedy choices. Likewise, the retail business utilizes extensive amounts of data to fulfill the constantly changing needs of customers.