computer science

Krrb

Krrb is a computer science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Krrb rather than just read about it. In short: Krrb (pronounced 'curb') was a hyperlocal classified advertising website that allowed individuals and businesses to sell items. Members of the website could also list real estate, housing, events, services, jobs and community notices.

Key takeaways

Krrb belongs to computer science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Krrb to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Krrb from memory before moving on to harder problems.

Reference excerpt

Krrb (pronounced 'curb') was a hyperlocal classified advertising website that allowed individuals and businesses to sell items. Members of the website could also list real estate, housing, events, services, jobs and community notices.

Overview The website was based on the idea of neighborhood garage sale or flea market, prioritizing proximity over categorization so that users could see listings nearest to them. Each seller got a personal storefronts (known as 'corners') where all their listings were displayed. As of October 2014, the company had 31,332 listings from 92,341 members in 3,211 cities and 118 countries. The website's domain was no longer operational as of March 2017.

History George Eid created an "online flea market" designed to be a competitor to craigslist. Krrb.com was launched in November 2010 and incorporated as Krrb, Inc. in January 2011. The company is headquartered in Brooklyn, New York City and is privately owned by Area 17, an interactive agency based in New York City and Paris, France. Luis Lavena, core developer of the programming language Ruby, designed and developed the software and led the engineering team. Interactive art director Arnaud Mercier (now deceased) designed the logo and user interface. Andrew Wagner, former editor of ReadyMade, American Craft and Dwell Magazine and columnist for the New York Times, joined the company in 2011 as director and editor-in-chief. In 2014, Phil Jeffs, director of product at Area 17, joined the team to lead product development.

Krrb classifieds network In 2012, Krrb partnered with Apartment Therapy to create classifieds for the site. Following this, Krrb created a classifieds network of other targeted classified sites. The Krrb Classified Network was released in October 2013 with the launch of the Chicago Magazine Classifieds.

Conflict with Craigslist In February 2013, Craigslist attorneys sent a cease-and-desist letter demanding that Krrb permanently disable its "Krrb It" button, a bookmarklet tool that enables a registered user of Krrb to copy factual information from their own Craigslist posts to Krrb, using publicly-available information, and display in a way that is unique to Krrb. The company disabled the "Krrb It" button for Craigslist.

References

External links Official website

Illustrations

Worked examples

Example 1 — a first encounter with Krrb

Start with the simplest possible case. Write down what Krrb claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In computer science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Krrb before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Krrb ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Krrb

In research: Krrb appears in computer science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Krrb in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Krrb is common in secondary-school and first-year university syllabi. It links to neighbouring topics Defunct social networking services, Geosocial networking, Internet properties established in 2010, so understanding it makes those chapters shorter.
In everyday life: Look for Krrb outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Krrb in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Krrb means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Krrb out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Krrb in simple terms?

Why does Krrb matter?

Because it connects several computer science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Krrb?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Krrb.