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

Hi everyone, my personal website has been upgraded and I like it very much.👇

lochanpeng.com
There are my art reviews and reports over the years (in the process of collating)
There are also my works. In particular, my works will no longer be classified in series on the website, but in chronological classification. This is also in line with my perception of creativity in recent years. If the relationship between the work and the person is one in the present, then do the ten-year-long series mean that the person has not changed in the past ten years?
So for me, the series is a kind of framework, and it can even be said to be a shackle. Also because my website works are classified by chronology, I have also seen that the difference in my life course is completely reflected in my works-some years of creation are very colorful, Some years are very gloomy, some years are particularly obsessed with huge works, and some years have suffered setbacks in life. These are all very interesting to me. Creation is like breathing to me.
At the same time, I have been thinking about this part of the newly completed online course area for a long time. Is it necessary to have a promotion month and various marketing methods like when working with industry platforms in the past?
In the end, I decided not to do this.
I hope that the students who take my course can see my value rather than being attracted by the 20% discount. I hope that our relationship can be more purely focused on learning. Rather than let your head keep thinking about whether there is a cheaper way.
At the same time, designing and selling are very laborious. Abandoning the sales method, I will go back to the original point and focus on my creation, making better courses, and replying to your homework in the group. Just do this well.
I think this is my consistent way of doing things.
The new courses have just been established, and I will continue to add them in the future. Welcome to join my membership. You will receive all kinds of information updated on the website as soon as possible, including my exhibitions, new works, and new courses.
☆The course video will be converted to 1080P pixels from 10/1☆

📜 [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

之前收到英國一個好有心嘅art plartform Artvocate http://artvocate.co 嘅邀請，將我哋嘅作品印做art print喺英國同歐洲發售，收益部份會捐去Hong Kong Watch 香港監察同Hong Kong ARC，希望幫到artists之餘，可以用藝術繼續支持香港、泰國同緬甸嘅社會運動。

知道大家呢段日子都唔易過，不過如果有餘力嘅朋友，希望可以支持一下，咩方法都好，唔好放棄。我哋都唔會放棄！✊😣😣✊ 有興趣嘅朋友請click入⬇️
https://artvocate.co/collections/lumli-lumlong ，入面仲有其他畫作。頭10位用我哋呢個discount code➡️202109LLLsfgoire9⬅️買嘅朋友，會有£15 discount㗎~🤗🤗

************************************************

We received an invitation from an enthusiastic art platform Artvocate http://artvocate.co in UK, selling art prints of our works in the UK and Europe, part of sales price will be donated to Hong Kong Watch 香港監察 and Hong Kong ARC, hoping to help artists and use art continue to support social movements in Hong Kong, Thailand and Myanmar.

Days are not easy, but if you have spare resources, hope you can support us, no matter what method is used, don't give up. We will never give up! ✊😣😣✊ Friends who are interested please click⬇️
https://artvocate.co/collections/lumli-lumlong, there are many other works. First 10 people use our discount code➡️202109LLLsfgoire9⬅️to buy will have £15 discount~🤗🤗

Get your own custom haircare and 20% off your first set with my link: http://cen.yt/functionrachjunadventures

Thank you to Function of Beauty for sponsoring this video! I finally tried the curly girl method, which you guys have apparently been recommending for FOUR YEARS?! Turns out, it might actually be working for me! The curly girl method is a hair care routine (with many different options depending on your specific hair type) that focuses on hydrating your hair properly and bringing out your natural curls/waves, which some people may have just been brushing away their whole lives! (like me)

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Today I teamed up with one of my favorite NYC Chinatown food carts to spend the day making and selling some classic southern Chinese street food known as cheung fun 腸粉, which is essentially Cantonese rice noodles which come with a variety of toppings including Hong Kong style curry fish balls 咖喱魚蛋, beef entrails 牛雜, and pork skin 豬皮. They also sell tea egg, or 茶葉蛋. I had an amazing time selling these Cantonese classics on the street today, and customers were totally shocked to see me selling this food on the street! And I got to interact with lots of customers in both Cantonese and Mandarin.

If you’re in the area definitely be sure to check out Chang Lai Cheong Fun Cart at the corner of Grand and Bowery in Manhattan’s Chinatown. And tell them Xiaoma sent you! Here is their Google Maps link: https://goo.gl/maps/duqyJg7gMLToiKAP6

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鬼故事: https://www.youtube.com/watch?v=H4rmkFI1ik0&list=PLglqLngY6gv5BCwaoP-q6DOwUmw1lIusF

我最高觀看次數的影片 (我為何不再拍暗網? 只說一次): https://www.youtube.com/watch?v=jbihKaqEEQw&t=127s

曼德拉效應: https://www.youtube.com/watch?v=OMutzRIE_uE&list=PLglqLngY6gv5BCwaoP-q6DOwUmw1lIusF&index=17&t=5s

我的100K成長故事: https://www.youtube.com/watch?v=Kdhtp6A6YJE

破解Kate yup事件是假的! 不是綁架! 不要被騙! (Facebook上的證據): https://www.youtube.com/watch?v=2NJVt56ORWo&t=2s

日本最殘酷的直播節目: https://www.youtube.com/watch?v=7E81OKVX7wc

網上最可怕的一個字 (Ft. HenHen TV): https://www.youtube.com/watch?v=tLedkSHc7Os&t=145s

Billie Eilish賣掉了自己的靈魂嗎?
來自美國民間故事的口suet, 魔鬼纏繞音樂界的傳說一直都有. 我覺得英文的用詞 ‘Selling your soul’ miu suet得最tip chit.
當一個人走到絕望的交叉路口, 魔鬼就會用那個人最大的慾望誘惑他. 代價就是在生他可以擁有世界. 但死後, 靈魂就會gwuy魔鬼擁有受地獄無盡折mo.

歷史上最出名的 ‘魔鬼交易’ 有17世紀紅peen歐洲意大利, 天才小提琴家Paganini.
有指他長相奇怪: 面色蒼白, 眼神尖銳. 拉小提琴的速度就算令到琴上的弦斷了, 他仍然可以繼續彈到.
他lum死前亦趕走幫他做last rites (臨終祈禱) 的牧師, 好像凖備魔鬼來接走他的靈魂一樣.

他走了差不多300年後, 流行音樂涉及魔鬼交易的新聞有增無減. 其實是證明人類對於成功人妒才和多疑的現象.

或者沒有那麼嚴重, 可能只是一種不理解而已. 所以今天就用一個科學方法
‘The scientific method’ 5個步驟研究一下現今樂tan的魔鬼交易事件. 我們主要看: 音樂, mv, 唱片公司.

大家好又是我暗網仔
我們測試對象就是她

(Show Billie eilish) 大家應該有聽過這首歌吧!

最年輕, 18suey, 羸得Grammy 4個獎項的歌手.
billie的MV亦常常加入邪惡影像. 估計是自jauw或諷刺以上提到的事.


Make an observation (賣孩子做音樂)

Billie eilish 現時擁有超過62 million IG followers. 她自2015年暴漲 155倍follower數目的確hon有.其實Billie Eilish的爸爸, 媽媽和哥哥都是做娛樂圈. 大家可能以為Billie eilish是2018,19年突然從那裡爆出來.

但早於2015年她的單曲ocean eyes已經幫她吸立了Instagram有400K個follower的fans人數.
訪問中提到做音樂gam juy多年的哥哥Finneas會dok sun deng jo幫Billie做歌. 整將專輯也是在他們小時候的家錄音和完成的.

美國媒體自2018年爆出Nickelodeon兒童台製作人Dan schieder跟之前拍攝他劇集的未成年少女有ouy mui甚至yuet界的關係後一些 ‘星媽’ 賣仔女到娛樂圈名成利就的故事一一再比fan check.
極大部分星媽都是年輕的時候做不到明星, 然後自己兒女就從小訓練去完成夢想. Justin Bieber 媽媽是這些. Michael jackson爸爸曾是樂隊的吉他手.
Billie媽媽Maggie Baird是現職女演員, 更從小home-school Billie, 教她寫歌甚至2016幫她剪接MV. 一直為她po路. 很多網友覺得他們家庭一定是賣了Billie給Hollywood, sold her soul.
但可能只是她媽媽有的connection幫助到她.

ask a question
Music video weird symbolism (邪惡影像-撤旦)

第一條令我有深刻印象的Billie eilish MV是when the party’s over. 2018年近萬聖節推出的影片給我一種Poppy的感覺. 如果大家不知道Poppy是誰, 她曾有一段時間jun hum互聯網.
Youtube上post奇怪, 甚至被指有大量光明會象徵yun yue影片的.

但Billie的歌曲all good girls go to hell, 好女生都落地獄MV受到最多, 尤其宗教人士指罵. 故事開頭Billie do落天使型像dit lok凡間. 之後她走的LA街道開始juek火. 明顯是yun yu反基督教, 撒旦被趕出天堂然後dit lok凡間的故事.

Billie自細就在一所Presbyterian教堂表演. Presbyterian雖然也是基督徒的一種, 但某些教do比較不同: 列yu會allow same sex marriage. 但又不算反基督, 可能只有一些理念不同.

之後被ching ching MV的信sik是想講Global warming. 甚至頒獎典禮上表演也同樣出現火的場面, ‘火’ 背後象徵是global warming?
我相信kuw思這個MV時, do lok天使的故事一定是有參考的東西. 但有機會各個MV 只是想market一個壞女孩的型像. But ging她最出名的歌曲叫 bad guy. 所以可以接受.


form a hypothesis (假設光明會)

Billie首張專輯 ‘when we all fall asleep, where do we go?’ 是由Interscope唱片公司發行. Interscope其他大artist有: lady gaga, Madonna, Eminem.
Interscope這間公司之前也有其下Rapper Tory Lanez出來説揭發公司大廈裡發生的各種事. 其實網上已有多人講多個大唱片公司是由光明會控制.
而跟一本由Fritz springmeirer寫 ‘the Illuminati formula..” 的書, 一個明星能達到某一個chung chee的名氣有所犠生的. 也會做一些奇怪行, 跟蜘蛛, 眼流出黑色東西一一都是有關的.

所以假設Billie真的是有做過這些yee sik加入光明會.
那MV Bury a friend?面是否能給我們最直接的答案呢?

make a prediction
Bury a friend MV劇照是專輯的封面. 白色眼睛有指是Billie 的kuey hok已失去靈魂.

MV中Billie sik yeen的角色是男主角床下底的一隻魔鬼. MV多場動作有指跟駆魔人鬼上身的畫面相似.
雖然Billie在訪問中也confirm過這是MV的koy nim.
但這些被多隻手抓住網民覺得代表是 ‘他們’ 在控制她. 明顯MV中有兩個Billie eilish. 但整個MV最黑暗的推測. 因為加入祕密組織有指是需要張自己一個朋友fung heen給他們的. MV ‘Bury a friend’ 應該也是這個意思.

而片中的黑人有指是xxxtentacion, 一位已死去的rapper. 更是Billie的好朋友.


真相

xxxtentacion原名Jahseh dwayne Ricardo onfroy是於2018年6月18日在佛羅里達州駕駛時被兩名jung jup男子用槍射死. 到醫院後死亡. 跟Billie是沒有關係的.

1692年2月至1693年5月, 美國塞勒姆, 一個歷史悠久的沿海都市. 傳統而迷信的社群相信撒旦的化身會以人型, 巫婆的型式wuy hoi人間. 當時市內有兩位小女孩行為古怪. 初時3個不同女性就被囚禁, 被迫承認自己是巫婆. 不承認就處死. 指責其實人是巫婆亦能免死.

最後200人被指控. 25個處死. 之後出來dou hip説整個事件都是一埸誤會.


其實paganini的故事就是...他跟好多最功的藝術家一樣, 是5歲開始練自己的手藝. 台上一分, 台下十年功. 用一句 ‘魔鬼交易’ 去moot殺人的努力和付出. 這樣做, 真正黑心的又是誰呢?

利用Billie Eilish破解魔鬼交易的真相 | 女歌星陰謀論 (不喜勿插)

比利·埃利什, 塞勒姆審巫案?