Month: May 2017

I’m eating and looking at children’s toys. And what is the bear holding in its hand? Or rather, in its paw?:)

I’m going to ask a ridiculously embarrassing question. I’ve forgotten math. Why isn’t the volume of a cone equal to the area of a triangle times the circumference of the base? Circle area — radius times circumference? I know it’s not so, but can’t explain to my daughter why:(

Update: Explained it like this:

You can’t spin a line segment 2π times because the density of points near the center and at the edge of the circle will be different. It’s correct to find the area of a circle by adding the lengths of concentric circles from 0 to R. If you represent this as a graph, you get a triangle with an area of 2πR*R. The same approach applies to the cone, but you need to sum the areas of cone slices from a base area of zero.

But unlike the circle area example, here the relationship isn’t linear, it’s parabolic, and you can’t find the area of a parabolic segment “on your fingers”; you need to explain what an integral is.

We relate the cone’s height and slice radius to a single variable of the integral, and find it, which gives us the volume of the cone. The integral is taken from the second power, hence the three in the denominator after calculating the integral. Explaining “on the fingers” why integrals are computed from functions x^n is a topic of its own, it’s better to just believe it for now)

“Immortal Regiment” in Washington.

Now all Google ads keep showing me the hotel I’ve already booked in Florida. Seriously, why do I need that now?

And yet, ideally, advertising should work differently… why not let me enter the keywords/queries myself that define the themes I want to see ads for. Like things to do in Florida or Disneyland universal studio SeaWorld coupons or rent a car in Florida? And also specify a time after which these queries become irrelevant. Rented a car – went in, deleted the query. Or entered a new one. Or I have some wishes for my birthday, I could list them, and I wouldn’t mind receiving a good offer – after all, some advertiser will mention these keywords somewhere. Let advertisers find me with last minute offers for hotels and stuff. Why doesn’t it work this way?

The guys are quite good at making Russian-language covers of foreign rock bands https://www.youtube.com/channel/UCYfYQ1lmPwPdxjBpW_rMJ7w

By the way, they also have a concert in Moscow on May 20th

Facebook suggested that I check out the sights of McLean. Well, it’s like the sights of Lobnya: just absolutely nothing interesting. The list included the CIA (which is not in McLean, but a bit further away, about 10 minutes), followed by amusing Chinese comments.

In my personal ranking, the accolade for the strangest film goes to Girl Asleep. I wouldn’t be surprised if no one here has seen it. On Kinopoisk, there are zero reviews. http://girlasleepfilm.com/ It’s very unusually and beautifully shot, but the director definitely didn’t do it without hallucinogenic mushrooms.

Last weekend I finished the article about the promotion mechanics and their implementation in hybris 6.x. (The article will be useful for all e-commerce people, not only for the hybris community)

https://hybrismart.com/2017/04/30/promotion-mechanics-and-their-implementation-in-hybris-6-x/

In this article, I overview the common promotion mechanics and their default implementation in SAP hybris. You may be surprised to learn that some things don’t work as expected. I explain the edge cases and typical flaws with the default implementation as well as offer words of advice on how to build it properly.

I hope it will help you to understand the limitations of hybris promotion engine and identify the edge cases.

P.S. If you have any comments and additions, please send them to me and I update the article.