關於 more intuitive ，我們在網路上蒐集到這些相關的討論、資訊與評價

Bake with the kids they said. It will be a sweet memorable experience they said 🙃🙃🙃. Oh the arguments on who gets to pour this and that. Oh the mess. So much mess 😨. Oh the sugar rush when they’re high in sugar 🙃. I’m bracing myself for lots of baking days to come for the cooler season. I finally had a chance to play around with my iPad Pro. My previous tablet was just too laggy and while I love how intuitive the Apple Pencil is, it’s taking me sometime to learn the shortcuts without my keyboard 🥲. Nonetheless, I’m eager to learn and I’m so excited to do more comics on parenthood. #bubzcomics #cutecomic #comic #baking #lindytsang #bubzvlogz #bakingwithkids #instagramvsreality

📜 [專欄新文章] Gas Efficient Card Drawing in Solidity

✍️ Ping Chen

📥 歡迎投稿： https://medium.com/taipei-ethereum-meetup #徵技術分享文 #使用心得 #教學文 #medium

Assign random numbers as the index of newly minted NFTs

Scenario

The fun of generative art NFT projects depends on randomness. The industry standard is “blind box”, where both the images’ serial number and the NFTs’ index are predetermined but will be shifted randomly when the selling period ends. (They call it “reveal”) This approach effectively solves the randomness issue. However, it also requires buyers to wait until the campaign terminates. What if buyers want to know the exact card right away? We’ll need a reliable onchain card drawing solution.

The creator of Astrogator🐊 isn’t a fan of blind boxes; instead, it thinks unpacking cards right after purchase is more interesting.

Spec

When initializing this NFT contract, the creator will determine the total supply of it. And there will be an iterable function that is randomly picking a number from the remaining pool. The number must be in range and must not collide with any existing ones.

Our top priority is accessibility/gas efficiency. Given that gas cost on Ethereum is damn high nowadays, we need an elegant algorithm to control gas expanse at an acceptable range.

Achieving robust randomness isn’t the primary goal here. We assume there’s no strong financial incentive to cheat, so the RNG isn’t specified. Implementers can bring their own source of randomness that they think is good enough.

Implementation

Overview

The implementation is pretty short and straightforward. Imagine there’s an array that contains all remaining(unsold) cards. When drawIndex() is called, it generates a (uniform) random seed to draw a card from the array, shortens the array, and returns the selected card.

Algorithm

Drawing X cards from a deck with the same X amount of cards is equal to shuffling the deck and dealing them sequentially. It’s not a surprise that our algorithm is similar to random shuffling, and the only difference is turning that classic algo into an interactive version.

A typical random shuffle looks like this: for an array with N elements, you randomly pick a number i in (0,N), swap array[0] and array[i], then choose another number i in (1,N), swap array[1] and array[i], and so on. Eventually, you’ll get a mathematically random array in O(N) time.

So, the concept of our random card dealing is the same. When a user mints a new card, the smart contract picks a number in the array as NFT index, then grabs a number from the tail to fill the vacancy, in order to keep the array continuous.

Tweak

Furthermore, as long as the space of the NFT index is known, we don’t need to declare/initialize an array(which is super gas-intensive). Instead, assume there’s such an array that the n-th element is n, we don’t actually initialize it (so it is an array only contains “0”) until the rule is broken.

For the convenience of explanation, let’s call that mapping cache. If cache[i] is empty, it should be interpreted as i instead of 0. On the other hand, when a number is chosen and used, we’ll need to fill it up with another unused number. An intuitive method is to pick a number from the end of the array, since the length of the array is going to decrease by 1.

By doing so, the gas cost in the worst-case scenario is bound to be constant.

Performance and limitation

Comparing with the normal ascending index NFT minting, our random NFT implementation requires two extra SSTORE and one extra SLOAD, which cost 12600 ~ 27600 (5000+20000+2600) excess gas per token minted.

Theoretically, any instantly generated onchain random number is vulnerable. We can restrict contract interaction to mitigate risk. The mitigation is far from perfect, but it is the tradeoff that we have to accept.

ping.eth

Gas Efficient Card Drawing in Solidity was originally published in Taipei Ethereum Meetup on Medium, where people are continuing the conversation by highlighting and responding to this story.

👏 歡迎轉載分享鼓掌

Now on Sale

https://takaya.zaiko.io/e/hanayuishi2021

Live streaming from Konkai-Komyoji Temple in Kyoto

Saturday, October 30, 2021

15:30 Start on fine weather
17:30 Start on rainy weather

Archive video will be available on Zaiko until 23:59, Wednesday 2/11/2021. (You can watch as many times as you want during this period)

NOTICE: *In case of raining, the performance starts at 17:30. You will receive an email from Zaiko if the time is changed on the day.

【Tickets】
2250yen (including 250yen for handling fee)
Available on Zaiko from 1 Oct (Fri) 10:00 - 3 Nov 21:00 (JST)
*You will need to register for a ZAIKO account to purchase tickets.

【Before Watch】
Register and watch guide
https://www.youtube.com/watch?v=BwDzQxC8vlE

☆Please refer to the support page on the ZAIKO website for information on how to watch the show and detailed settings.
https://zaiko.io/support
ーーーーーーーーーーーーーーーーーーーーーー
Tohru Yamasaki
President of T2Generation
Organizer of “TSUKENOKAI”. Tsukeuchi (tsuke percussionist) for Kabuki.Born in Kojima, Kurashiki City, Okayama Pref. on 28 February, 1969. Blood Type: B
1989: Joined in LIFE SOGOBUTAI Co.,Ltd. (formerly known as LIFE Bijutsusha Ltd.) located in Takamatsu City, Kagawa Pref. Autumn 1990: Moved to Tokyo.October 1992: Joined in Pacific Art Center Inc. after working freelance. Assigned to SHINBASHI ENBUJO (theater) to start a career as a tsukeuchi (tsuke percussionist). Since then, engaged in Kabuki performances in and outof Japan. August 2020: Resigned from Pacific Art Center Inc. Established T2Generation to start supporting cultural activities through tsukeuchi performance. Based on the career, trying various performances of art and culture by collaborating with others from different fields.
�Tsuke is one of the sound effects to emphasize the movements and power of the characters on the stage, which impresses the play more effectively. It is often used for the important scenes: when the main character is appearing on stage, changing his/her clothes, when the stage setting changes (stage elevator rises or a building collapses), and to highlight the effect of props.“Oto (sound) wo tsuke-ru” means “adding sound to the play”, which is the reason why it is called “tsuke”. The two wood blocks to make sounds are called “tsuke-uchi”. Tsukeuchi (tsuke percussionist) sits on the stage left (audience’s right side) where he makes sounds using tools, tsuke-ita (tsuke wood board)and tsuke-gi (two wood blocks).
WEBT2Generation https://t-yamasaki.wixsite.com/t2generation
TSUKENOKAI https://t-yamasaki.wixsite.com/tsukenokai

HANAYUISHI TAKAYA
TAKAYA, as known as HANAYUISHI, is an artist based inkyoto who combines floristry with art and fashion to create one-of-a kind headdresses. Takaya has invented and developed a technique of tying living plants like flowers.vegetables.fruits.twigs.plants and even taxidermy into hairs to make highly unique and ethereal works - as he describes as a “unity of human and nature.”
Takaya creates his works on the spot,choosing flowers to with cloth or personality of the person. It is an intuitive and spontaneous work that it is almost impossible to plan the design ahead since flowers are living things every bloom is different.every stems has its own line.There is beauty of working with living plants as opposed to dried plants - as if Takaya intensifies the energy of the living plants.the result of his stylings are so vibrant and memorable.
Takaya shows his work through photography and live performance.
Performances are often held in unique locations like Buddhis temples and museums in throughout Japan and Sweden. He has been featured in numerous publications and broadcasts around the world, including Daily Telegraph, Glamour Italia, Holland Herald, and NHK World TV.
Takaya also collaborates with Yumi Katsura, a well-known bridal fashion designer for Yumi Katsura Grand Collection.
http://www.takaya

KONKAI-KOMYOJI TEMPLE
https://www.kurodani.jp/en/

#fashionnova #falloutfits #tryonhaul

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Hello my loves ?✨ Welcome to my Channel! My name is Rosanna aka Rose & in today’s video, we take a look at some KILLER looks from Fashion Nova’s Fall Collection.

Shopping for clothes is never easy. With the online market nowadays, there’s so many items all over the Internet. I went ahead and chose some amazing products that might just blow your mind.

Whether you’re runway ready or simply looking for an outfit for a night out on the town, look no further! From girl to girl, I GOT YOU! ? Enjoy ^.^

Find me on Instagram!
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Zhiyun Smooth Q2 - https://amzn.to/2oW32Mr

Zhiyun Smooth Q2 a brand new innovative compact mobile gimbal that is made more user-friendly as possible, yet kept all the great feature you find on modes higher class gimbals, for example like POV and the 360 roll. Its new improved mode navigation and also ease of use and enabling triggering the standard camera app on any mobile phones, making this gimbal very intuitive and especially for the first time gimbal users.

Special Thanks to Manway for the Lamborghini used in this video
https://www.facebook.com/ManwayElectronic/

This video is filmed with:
Panasonic Gh5 - https://amzn.to/2N5FnUc
Laowa 7.5mm f2 - https://amzn.to/2Q37K7Q
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Edited with Adobe Premiere Pro - http://goo.gl/k2EagF

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เปิดตัว Lamborghini Huracan EVO ลัมบอร์กินี่ ฮูราคาน อีโว ในไทย เปิดตัว 22 มีนาคม 2019 นี้

Automobili Lamborghini presents the new Lamborghini Huracán EVO: the next generation V10 super sports car, based on the prowess and performance of the Huracán Performante and incorporating next-generation vehicle dynamic control and aerodynamics.

“Lamborghini is intent on leading the advance to the highest level of super sports car technologies and driving emotion. This is the essence of the new Huracán EVO. It takes the extraordinary abilities of the Huracán Performante and combines state-of-the-art vehicle dynamic control to amplify the everyday Huracán driving experience,” says Stefano Domenicali, Chairman and Chief Executive Officer of Automobili Lamborghini. “The Huracán EVO is the very definition of evolution: it is a step ahead, redefining the segment parameters. It is remarkably easy to drive, while delivering the most responsive, sensory and agile driving experience, in every environment.”

Technological evolution amplifies driving emotion

The Huracán EVO features the 5.2 l naturally-aspirated Lamborghini V10 engine, uprated to produce higher power output and an emotional and powerful sound, with Titanium intake valves and refined lightweight exhaust system. The Huracán EVO outputs 640 hp (470 kW) at 8,000 rpm with 600 Nm of torque delivered at 6,500 rpm. With a dry weight of 1,422 kg the Huracán EVO reaches a weight-to-power ratio of 2.22 kg/hp, accelerates from 0-100 km/h in 2.9 seconds and from 0-200 km/h in 9.0 seconds. Braking from 100 km/h to 0 is achieved in just 31.9 m, with a top speed of more than 325 km/h.

Lamborghini Dinamica Veicolo Integrata (LDVI)

The Huracán EVO features new Lamborghini rear-wheel steering and a torque vectoring system working on the four wheels, while at the heart of the car is the new feature of Lamborghini Dinamica Veicolo Integrata (LDVI): a Central Processing Unit that controls every aspect of the car’s dynamic behaviour, fully integrating all of the car’s dynamic systems and set-up to anticipate the next move and needs of the driver, interpreting this into perfect driving dynamics.

Lamborghini Piattaforma Inerziale (LPI), a comprehensive set of accelerators and gyroscope sensors placed at the car’s center of gravity, has been enhanced to version 2.0. With improved precision, it monitors in real-time the dynamic vehicle attitude regarding lateral, longitudinal and vertical accelerations, as well as roll, pitch and yaw rate. The magneto rheological suspension, upgraded to version 2.0, instantaneously adapts the damping following inputs from the LPI. A new advanced traction control system together with enhanced all-wheel drive and torque vectoring, allows traction to be directed to a single wheel as required.

Enhanced Lamborghini Dynamic Steering (LDS), able to provide higher responsiveness in corners while requiring the lowest steering angles, is now coupled with rear-wheel steering in order to ensure agility at low speed, as well as maximum stability in high-speed cornering and under braking in the most severe conditions.

The unique combination of all these systems is governed by Lamborghini’s LDVI to create a super-agile and responsive car with unparalleled level of control. Processing data in real time, the Huracán EVO recognizes the driver’s intentions through steering wheel, brake and accelerator pedal inputs, engaged gear and the driving modes selected via ANIMA controller: STRADA, SPORT or CORSA.

External conditions are determined through active suspension and all-wheel drive grip estimation function. All of this information is analysed and processed by LDVI, which turns them into precise inputs for the vehicle dynamic system. A ‘feed forward logic’ is implemented via the dynamic controller, which means the car doesn’t just react, but predicts the best driving set-up for the next moment.

In STRADA, the Huracán EVO is agile and capable for driving enjoyment, whereas in SPORT it becomes playful, intuitive and extremely exciting. In CORSA the Huracán EVO is sharp, reactive and exhilarating for the most extreme driving environments, such as racetracks.