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Object-Oriented Programming In JavaScript

Learn all about OOP, understand the most confusing parts of JavaScript and prepare for technical interviews

What you’ll learn

  • Understand the most confusing parts of JavaScript
  • Learn all about object-oriented programming
  • Prepare for technical interviews
  • Manage and reduce complexity in code
  • Build re-usable components
  • Write cleaner code
  • Learn all about prototypes and prototypical inheritance
  • Use ES6 features (classes and modules) and tooling

Requirements

  • At least 3 months experience with JavaScript

Description

What is Object-oriented Programming (OOP)?

Object-oriented programming (OOP) is a popular programming paradigm or style of programming. It’s been around since ‘70s, but unlike tools and frameworks that come and go, OOP is still very relevant today. That’s because it’s not a programming language or a tool. It’s a style of programming.

Why learn OOP?

OOP helps you manage and reduce complexity in software by building re-usable building blocks (objects). Properly designed objects provide a simple interface and hide the unnecessary complexity from the outside, just like a DVD player! A DVD player has a complex logic board on the inside and a few buttons on the outside. When you press the play button, you don’t care how all those microchips talk to each other.

Object-oriented programming helps you:

  • Manage and reduce complexity
  • Eliminate redundant code
  • Build re-usable building blocks
  • Write cleaner code

An essential skills for every developer

OOP comes up in many technical interviews. So if you really want to be a serious developer, you need to understand object-oriented programming. As a technical interviewer myself, if I see a candidate with OOP on their resume, that candidate stands out to me.

It may interest you to know that many of the popular frameworks out there that you might be using are actually designed with OOP concepts in mind. Angular is an example of such frameworks!

A Step-by-Step, A to Z course

What you’ll get when you sign up for this course:

  • Learn all about object-oriented programming in JavaScript
  • No more wasting time on disjointed tutorials
  • Learn at your own pace – lifetime access – so take your time if you prefer
  • Watch on any device, online or offline
  • Solidify your understanding of JavaScript
  • Prepare for technical interviews
  • Confidently build applications with Node, Angular, React, Vue and other JavaScript libraries
  • Learn the best practices and common pitfalls to avoid
  • Certificate of completion to present to your employer

You’ll learn

  • The core principles of OOP: encapsulation, abstraction, inheritance and polymorphism
  • How to implement OOP concepts in JavaScript
  • All about objects, their properties, property descriptors, getters and setters
  • Difference between factory and constructor functions
  • How “this” works in JavaScript
  • Prototypes and prototypical inheritance: one of the confusing parts of JavaScript
  • ES6+ features used in object-oriented programming

This course is for you if:

You’re a developer who already knows OOP principles but want to learn how to implement them in JavaScript.

You’re a developers who is not familiar with OOP, perhaps you just know the basics of JavaScript and want to solidify your understanding of JS and prepare for technical interviews.

Having OOP and JS on your resume helps you find more jobs and make more money.

Are you ready to take your JavaScript skills to the next level? Enroll in the course and get started. Who is the target audience?

  • Any JavaScript developers who wants to solidify their understanding of JavaScript
  • Anyone preparing for technical interviews
  • Developers familiar with OOP who want to learn how to implement it in JavaScript

Created by Mosh Hamedani
Last updated 4/2018
English

Size: 1.72 GB

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For this assignment, use the novel or short story you chose to read for this module. Write a paragraph explaining the conflict and the perspectives of the protagonist and antagonist. Review the example in the lesson. Be sure your paragraph mentions the title and author in the first sentence briefly summarizes the plot identifies the main conflict describes the protagonist’s perspective on the conflict provides a line of dialogue that the protagonist says to support your idea (text support) describes the antagonist’s perspective of the conflict provide a line of dialogue that the antagonist says to support your idea (text support) includes a closing line to summarize the character’s views uses correct grammar, punctuation, and spelling



For this assignment, use the novel or short story you chose to read for this module. Write a paragraph explaining the conflict and the perspectives of the protagonist and antagonist. Review the example in the lesson. Be sure your paragraph mentions the title and author in the first sentence briefly summarizes the plot identifies the main conflict describes the protagonist’s perspective on the conflict provides a line of dialogue that the protagonist says to support your idea (text support) describes the antagonist’s perspective of the conflict provide a line of dialogue that the antagonist says to support your idea (text support) includes a closing line to summarize the character’s views uses correct grammar, punctuation, and spelling

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“when you build defenses, you are minimizing the risk of encountering future problems. Through this strategies, you learn how to cope with the changing times and how to turn each challenge into something beneficial” 1. my journey through this lesson enabled me to learn… 2. it made me realize that… 3. I, therefore, commit to…


Answered by answersmine AT 22/10/2019 – 02:35 AM

As far as I understand, you have to write possible conclusions and show how motivated you become after reading this excerpt. You can write something like this  : 1)  My journey through this lesson enabled me to learn that I am capable of making and doing new things, the things which I have never experienced before. I also can see that my potential is quite enough to bring all the learned things in the future. And even though life can prepare a tough situations, I can accept this challenge and make a profit out of life obstacles because my knowledge is my weapon.
2) It made me realize that every person must take life challenges seriously. People also have to recognize these challenges in order to be prepared for the unexpected future. So now I understand that I should never give up and always keep in mind that there are always many solutions and the only thing that people need — is a little time to find them.
3) I, therefore, commit to be strong and faithful to myself and towards other people. Accepting personal challenges help one to be a good person, so I am ready to assume such a responsibility. With this realisation I can inspire myself for new steps towards the future. It will make me feel confident wherever I am and thus can lead me to a personal success.

Post your answer

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“When you build defenses, minimizing the risk of encountering future problems. Through this strategies, you learn how to cope with the changing times and how to turn each challenge into something beneficial.”My journey through this lesson is enabled me to learn__________________________________________________It made me realize that ___________________________I, therefore, commit to_______________________


My journey through this lesson allowed me to
learn that the most significant component of defense is responsiveness. It is
important for us to be aware for it serves as one of the best defenses we had.

It made me understand that
putting defenses lessens the risk of encountering future problems. Also, it
made me realize that putting defenses helps me toughen myself in the middle of
discrimination. 


I, therefore, commit to much
strengthen myself and as well as my defenses for it really helps me. 

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Look at the five words you selected to study during this lesson. Use the third one in an original sentence. In a second sentence, explain how you have used this word in your daily life. In a third sentence, explain where you have heard or read this word. Use proper grammar and spelling. Note: You must write your own original sentence to receive points for this question. My word Exhaust


Hey there!

Correct answer is D. Comma or Period Inside Rule

A. Question mark or exclamation point inside: those are not really necessary.

B. Colon or semicolon: not, a semicolon would divide the whole sentence and it would be shorten; a colon would work but after requested, when there is already a comma.

C. Question mark or Exclamation Point Outside Rule: would not work, becase it is an very polite and affirmative sentence.

D: A comma or period inside rule: actually, just a comma would work. Please, Cooper’s dad requested, go… Cooper’s dad requested must be in between commas as it is a vocative.

Hope this helps

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Imagine your 16-year-old daughter wants to attend a friday night high school party, and you do not know who will be attending. using three parenting styles discussed in the lesson, how would an authoritative parent respond? a democratic parent? a permissive parent?



Imagine your 16-year-old daughter wants to attend a friday night high school party, and you do not know who will be attending. using three parenting styles discussed in the lesson, how would an authoritative parent respond? a democratic parent? a permissive parent?

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Who do you learn from this present lesson could have avoided trouble if he or she had avoided temptation? Nausicaa Paris Agamemnon Cassandra Ajax select all that apply


Answer:Leo Tolstoy wrote the novella The Death of Ivan Ilyich to criticize the emerging middle class of modern Russia in the nineteenth century. Ivan Ilyich, his family, and his friends are part of this budding middle class. Tolstoy’s aim in writing this novella was to criticize the thoughts and the approach of middle class people toward their families, their jobs, and society. He used the life of Ivan Ilyich to demonstrate all the aspects of the middle class that he believed were wrong. Tolstoy portrays Ivan Ilyich as a man whose life decisions are based on social acceptance. He chooses his friends and even his wife based on their social standing. When he starts to find his family life unpleasant because of his wife’s constant nagging, he limits his interactions with the whole family. Instead, he seeks comfort in his work. He assumes a formal relationship with his family members, particularly his wife. This change in his feelings and attitude toward his family does not seem strange to him. On the contrary, getting away from his family becomes his life goal:  

This aloofness might have grieved Ivan Ilyich had he considered that it ought not to exist, but he now regarded the position as normal, and even made it the goal at which he aimed in family life.

Tolstoy deplored the middle-class habit of maintaining distance with family members in private but keeping up appearances of closeness for the public. Tolstoy shows his character Ivan Ilyich making the effort to maintain this detachment from his family members while ensuring that his family appears on the outside to be a regular and happy family. Even when he has to be at home with his family, he makes sure that they have guests. That way, he can avoid confrontations or meaningful discussions with his family:

His aim was to free himself more and more from those unpleasantnesses and to give them a semblance of harmlessness and propriety. He attained this by spending less and less time with his family, and when obliged to be at home he tried to safeguard his position by the presence of outsiders.

Ilyich’s work soon becomes an obsession, and everything else, including his family is secondary to his job:

The chief thing however was that he had his official duties. The whole interest of his life now centered in the official world and that interest absorbed him.

Through Ivan Ilyich, Tolstoy portrayed a class of people who make determined efforts to escape human contact and suffering by seemingly living in denial. They are people who run away from love and relationships, and they are unwilling to reflect on their lives. Instead, they choose to exist in their self-centered world until they are jolted into reality. In Ivan Ilyich’s case, this jolt comes in the form of his illness in chapter 4.  

Tolstoy would not have agreed with Ivan Ilyich’s priorities. Unlike Ivan, Tolstoy looked inward throughout his adult life. He searched for a deeper meaning and purpose, especially in regard to his political and religious ideals. While those ideals eventually caused Tolstoy to avoid his wife, he generally had a close relationship with his family. By all accounts, he seemed very much a man who loved and cherished his wife and their 10 children. While Tolstoy was dedicated to his writing, his family seemed to inspire him, rather than get in the way of his literary genius. His wife was involved in his work, having transcribed most of his writing. Even Tolstoy’s last days were spent on a pilgrimage that he embarked on with his youngest daughter.

Explanation:

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Explain the role of nationalism in the unifications of Italy and Germany in one paragraph. Use specific details from the lesson and assignment to support your answer.


The Reformation actually started after Columbus’s landing in North America. 

Treaty of Tordesillas in 1494 was forced on Spain and Portugal by the Pope. The Pope basically said that all lands in the New World belonged to Spain and all new non-Christian lands in the Eastern Hemisphere belong to Portugal. No other Catholic countries can do anything in those areas without the approval of the owner. 

The pope basically drew two lines on the globe setting the border. The western line started at the north pole cut half way through Greenland and ended at the south pole. The new world was everything to the west. Problem is that it ran through a chunk of Brazil which is why Brazil is an ex-Portuguese colony. 

The Eastern line starts at the North Pole runs through siberia, through the pacific just west of Japan, and cuts Australia in half. Of course, Australia hadn’t been discovered yet. Everything to the the east of this line is the new world. 

Obviously, this treaty didn’t hold up well, but the reformation gave the protestant countries an excuse to explore the new world since they didn’t have to take orders from the Pope. Even so, France, a catholic country, ignored it too. 

Really, the only country that was effected by the reformation in the exploration of the Americas was England. All the other countries, changed their religion once and then went to war with the nearest catholic country. Sweden became Lutheran and stayed that way. The Dutch Republic became Calvinists and stayed that way. 

England kept switching. First it was Catholic. Then, Henry VIII made it protestant. Then, Henry’s daughter Mary I made it catholic again. Henry’s other daughter Elizabeth I (with the two hit movies) made it Protestant again. 

Years latter, Oliver Cromwell over through the monarchy, executed the King Charles I, and established a Protestant fundamentalist religious military dictatorship. He outlawed drinking,smoking, gambling, theater, dirty books, sports, prostitution, and anything generally fun. He would have made Saudi Arabia proud. Basically, all you could do is work, pray, and die. Sex was allowed for creating children, but you couldn’t enjoy it. 

When Cromwell died, the people of England said enough was enough and brought back the King. Charles II kicked out the fundamentalists and brought back drinking, smoking, gambling, dirty books, sports, prostitution, and having fun during sex. Incidentally, those were also all his hobbies. 

This brings us to the famous Pilgrims. They were part of Cromwell’s crowd. They kept agitating a return to the no-fun policy. They annoyed everybody. They weren’t persecuted for practicing their religion, they were persecuted because they kept trying to force their religion on everyone else. Sort of like Southern Baptists. 

Charles II was the most easy going monarch in British history. Do realize how annoying you have to be to get him to throw you out. 

Charles’s brother James II was obsessed with turning Great Britain catholic again. After four years of trying, they kicked him and his followers out. 

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Explain how World War I led to significant changes in society. Use specific details from the lesson and the reading to support your answer.


The correct answer is A) To create a buffer zone between itself and the western powers.

After World War ll. the Soviet Union took over a number of countries to its west to create a buffer zone between itself and the western powers.

Soviet leader Joseph Stalin wanted to have a buffer zone in case of an invasion planned by western European countries or the United States. That is why Russia took countries such as Czechoslovakia, Hungary, East Germany, Poland, Bulgaria, Romania, and Yugoslavia. The Soviet Union spread Communist all over Eastern Europe and reached other countries such as China, North Korea, Vietnam, and Cuba.  

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Think about the two texts you read in this lesson and how they present different aspects of the same story. How did reading both texts enrich your understanding of Iqbal’s story?


Answer:

In literature, the thoughts, feelings, and ideas of a character as they occur; ongoing unedited and unorganized conscious experience through the mind

Explanation:

Stream of consciousness is a narrative method that shows the flow of the thoughts, ideas, opinions, and interpretations, as well as the complex psychology of the main character.

Common in modernist works, this device, also known as interior monologue, presents the character speaking to her/himself, and it can be in an unordered and spontaneous manner.

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According to the lesson, why did Germany's economy nosedive following World War I? 1)Huge war reparations 2)Severe political turmoil 3)Poor economic policies 4)Loss of military capabilities



According to the lesson, why did Germany’s economy nosedive following World War I? 1)Huge war reparations 2)Severe political turmoil 3)Poor economic policies 4)Loss of military capabilities

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Biology B Unit 4: The Human Body – Lesson 12: The Integumentary System 1) Which of these is NOT a function of your skin? (1 point) a) keeps your body cool when you exercise b) releases waste products like urea and salts c) helps prevent pathogens from entering your body d) holds the bones of the skeleton together 2) The integumentary system includes (1 point) a) skin only b) hair only c) nails only d) skin, hair, and nails 3) Which of these skin cancers is most likely to spread to other parts of the body without early treatment? (1 point) a) basal cell carcinoma b) squamous cell carcinoma c) melanoma d) basal cell carcinoma and melanoma 4) What happens when the keratin-producing cells of the skin die? (1 point) a) Melanin and keratin are produced. b) An additional dermis layer is formed. c) A waterproof coating is formed. d) Melanin is produced. 5) Dandruff is caused by the shedding of excess cells from the outer layer of the skin. What is this outer layer called? (1 point) a) dermis b) hypodermis c) epidermis d) hair follicle


Answer:

Two diseases caused by microorganism include –

a) Ebola hemorrhagic fever

b) Tuberculosis

Explanation:

Microbes are unicellular organisms. There are mainly five types microorganism that cause diseases. –  

a) Virus  

Example of a disease caused by Virus –  

Ebola hemorrhagic fever caused by Ebolavirus and Filoviridae family

b) Bacteria

Example of a disease caused by bacteria –  

Tuberculosis (TB) is a kind of respiratory disease caused by bacterium called Mycobacterium tuberculosis.

c) Fungi

Example of a disease caused by Fungi

Athlete’s foot is a fungal disease caused by Trichophyton  

d) Protozoa

Example of a disease caused by Protozoa

Ameobiasis caused by Entamoeba histolytica

e) Worms

Example of a disease caused by worms  

Infection in intestine is caused by Ascaris lumbricoides, Ancylostoma duodenale,  etc.  

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16. Circle all the names that describe the polygora. (Lesson 8-14)quadrilateralrectangleSquareparallelogramrhombustrapezoid



16. Circle all the names that describe the polygora. (Lesson 8-14)quadrilateralrectangleSquareparallelogramrhombustrapezoid

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According to the lesson how did Medieval Society view women

Answer:

A) The king could decide to go to war, while the nobles could not

Explanation:

But between the thirteenth and fourteenth centuries there was a change, due to the cultural and political influence they received from their neighbors and their conquests. This is how an Aztec society developed with a hierarchical and complex character.

At the apex of this society was the emperor or tlatoani, as political and military chief. The tlatoani had its counterpart, called cihuacoatl, a religious chief. Both were elected by a council of elders and tribal chiefs.

Another characteristic feature of Aztec society was its division into castes. The caste of the nobles (pipiltin) was made up of the members of the royal family, the chiefs of the calpulli and the military chiefs. The nobility occupied a place of privilege, far removed from that enjoyed by the Macehualtin, who were the farmers, merchants and artisans encompassed in the calpullis, which were social units formed by a group of families.

Further down the social ladder were the serfs (mayeques), who worked on state lands or the nobility. There were also slaves (tlatlacotin), who were employed as a work force or were reserved for religious sacrifices.

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Choose the answer based on the most efficient method as presented in the lesson. If the first step in the solution of the equation -9 + x = 5x – 7 is “subtract x,” then what should the next step be? subtract 5x add 7 add 9


Answer:

Ques 1: -1pm2i

Ques 2: (3x+5)

Step-by-step explanation:

The quadratic formula states that the roots of the equation, ax^2+bx+c = 0 are given by, x=frac{-bpm sqrt{b^2-4ac}}{2a}.

Ques 1: The quadratic equation is given by, 3x^2+6x+15 = 0.

On comparing, a= 3, b= 6 and c= 15.

So, the roots of the equation are given by,

x=frac{-6pm sqrt{6^2-4times 3times 15}}{2times 3}

i.e. x=frac{-6pm sqrt{36-180}}{6}

i.e. x=frac{-6pm sqrt{-144}}{6}

i.e. x=frac{-6pm 12i}{6}

i.e. x=frac{-6+12i}{6} and i.e. x=frac{-6-12i}{6}

i.e. x=-1+2i and i.e. x=-1-2i

Thus, the solutions of the equation are -1pm2i.

Ques 2: The quadratic equation is 9x^2+21x+10 = 0.

On comparing, a= 9, b= 21 and c= 10.

So, the roots of the equation are given by,

x=frac{-21pm sqrt{21^2-4times 9times 10}}{2times 9}

i.e. x=frac{-21pm sqrt{441-360}}{18}

i.e. x=frac{-21pm sqrt{81}}{18}

i.e. x=frac{-21pm 9}{18}

i.e. x=frac{-21+9}{18} and i.e. x=frac{-21-9}{18}

i.e. x=frac{-12}{18} and i.e. x=frac{-30}{18}

i.e. x=frac{-2}{3} and i.e. x=frac{-5}{3}

That is, the factors are (3x+2) and (3x+5)

So, according to the options, (3x+5) is the correct option.

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How do I do these problems? Can someone please give me a step by step lesson? Thanks


2 step equation:
4x + 3 = 19

2 step equation w/ fractions:
(4/3)x + 5 = 17

Distributive Property:
4x(6 – 2) – 10 = 20

Decimals:
4.3x + 0.7 = 5

Real world equation:
Sharon’s restaurant is bringing in money from customers, and she needs to know how much she needs to pay off the bill for the electricity to run the place.  To turn the electricity on, she has to pay $25.  For every hour that the electricity is on for, she has to pay $4.  How many hours can she have the electricity on for if she makes $49 profit?

I hope these helped!  Not too sure about the last one, I sort of let me imagination run wild.  In any case, don’t hesitate to ask me questions if you have any further inquiries. <3

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The increase in life expectancy over the last fifty years is linked to improvements in medical and other technologies. Write four to six sentences that identify how these breakthroughs have helped us live longer and healthier lives. Use examples from the lesson to illustrate your argument.


3. The Spanish American wars of independence were the numerous wars against Spanish rule in Spanish America that took place during the early 19th century, after the French invasion of Spain during Europe’s Napoleonic Wars. Although various regions of Spanish America objected to crown policies that restricted trade and privileged Spanish-born officials over American-born, “there was little interest in outright independence; indeed there was widespread support for the Spanish Central Junta formed to lead the resistance against the French.”[6]
4. Eva (Evita) Perón’s legacy has inspired books, musicals, & films; she escaped rural Argentina, where there were few opportunities, & gained prominence as a radio & movie star; Eva’s popularity among masses assisted her husband (Juan Perón) in his rise to power; using her radio show to tell people about her husband’s policies, she helped him win the support of the working class (whom she affectionately called the descamisados (shirtless ones)); although she didn’t hold a political office, she received the honorary title “Spiritual Leader of the Nation”; promising redistribution of wealth, labor reform, & national glory for Argentina, the Peróns threatened security of the wealthy who held power & gave hope to the poor; even in death, Eva Perón remained a controversial figure
Juan Perón had her body embalmed & had planned a large memorial to immortalize her, but his government was overthrown & he was sent into exile in 1955; at that time, the new government hid her body in an attempt to get rid of any evidence of the Perón years; her enemies buried her in a secret grave in Italy, where her body remained until the 1970s; her; her body was eventually returned to Argentina & laid to rest in a family cemetery in Buenos Aires
Her legacy has been subject to different interpretations over time; her supporters view her as a powerful female leader who championed of the poor & middle classes; those who opposed her said she manipulated the masses for her own ambitions; historians continue to sift through diary entries, political documents, & letters to unravel more about the mysteries of Eva Perón
Controversy surrounding Perón rule’s reflective of political & social divisions within Latin America
Most nations in South America had gained their independence from Spain by the middle of the 19th century; throughout the remaining decades of that century & into the 20th, many South American nations struggled with political instability; governments rose & fell quickly & military coups d’etat were common; Juan Perón of Argentina is just one example of these political struggles
5.