小朋友非常喜歡玩的繪本 CACHE-CACHE VILLE
嘗試把相同的原理運用到字母拼讀上,拿起小紅鏡找一找,圖片裡藏著的單字是什麼呢?
👉 用好玩有趣的方式引起小朋友的好奇心,讓小朋友忍不住一題接著一題玩,然後英文單字也不小心練習到了😆
學習單裡放了phonics short a/e/i/o/u 各8個單字,需要學習單請留言,私訊提供給大家(避免貼文被下架,讓大家都可以順利索取,請不要複製別人的留言哦!🙏🙏🙏)
*****
【Power English: PHONICS 自然發音法學習繪本套書】
快閃限時超級優惠價~9/29(三)
活動網址: https://bit.ly/3lWpQFh
奶爸介紹: https://pse.is/3ptyu8
✅ 套書下單直接送【小熊無毒安全特大號蠟筆(12色) + 小熊閱讀筆記畫畫本】(限前20名)
✅ 套書加購任一本小熊出版社出版品再贈【超好玩!各式各樣形狀的繪本】(限前20名)
✅ 滿千於結帳時記得輸入【babyi88】可以再現折100元 (不限人數,注意要在清單頁點購物車才享優惠)
#請勿商用
#玩中學
#從孩子的角度出發
#引起孩子主動想學習的欲望
#非學校型態實驗教育
同時也有364部Youtube影片,追蹤數超過11萬的網紅田中理恵 RIE TANAKA,也在其Youtube影片中提到,跳べるパンプス絶賛発売中! https://ec.wa-jp.com/ext/toberupumps.html #Short #跳べるパンプス #orientaltraffic...
「short o」的推薦目錄:
short o 在 Taipei Ethereum Meetup Facebook 的精選貼文
📜 [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
short o 在 我要做股神 Facebook 的精選貼文
走先啦,係咁先啦,下次再玩啦👋 聽講第一個反應,會反映到你係一個咩人😏按讚選答案🔥
恒指穿底,你第一個反應是...?
A. 懷疑人生(按"讚" 投票)
B. Short爆你個頭(按"心心" 投票)
C. 止蝕先,走先啦,係咁先啦👋(按"哈哈笑" 投票)
D. 哦~ (無買港股😏)(按"O咀" 投票)
逢星期一下午1點,YouTube富翁電視「我要炒股票」公佈答案!#股壇劉玄德 期待大家直播問炒股問題😉
========
►YouTube【我要做世界】: cutt.ly/Hx49a9a
►YouTube【我要做富翁】:https://bit.ly/35LOy2J
►YouTube【富翁電視MTTV】:https://bit.ly/35dJW4Y
►Instagram:instagram.com/money_tab
#恒生指數 #恒指 #走先啦係咁先啦 #撈底 #股票 #短炒 #我要炒股票 #富翁電視 #投資不是大鱷專利
short o 在 田中理恵 RIE TANAKA Youtube 的最佳解答
跳べるパンプス絶賛発売中!
https://ec.wa-jp.com/ext/toberupumps.html
#Short #跳べるパンプス #orientaltraffic
short o 在 Sleeping with Your Teacher Youtube 的最佳解答
Sleeping wIth Your Teacher EP 121:Award Winning LGBT Short Film- Hidden" 跟老師上床第集121集:青少年同志短片─迷藏
Please follow the fan page for Hidden 迷藏官方粉絲頁:
https://www.facebook.com/shortfilmhidden
The purpose of the show is to compare viewpoints from two generations of gay people.
有趣的同志談話性節目,比較兩個不同世代同志的看法。
This is a channel that has zero tolerance for internet gay bullying. Any comments that are unfriendly to the LGBTQ+ community will be deleted.
這是一個對同志網路罷凌零容忍的頻道,任何對同志有不友善的評論都會被刪除。
Please follow me on:
✔ I N S T A G R A M https://www.instagram.com/teachershen55/
✔ F A C E B O O K https://www.facebook.com/teachershen5
✔ E M A I L francisshen@hotmail.com
上字幕請找whitney199730@gmail.com
short o 在 花京院ちえり Youtube 的最佳解答
.LIVE所属 #バーチャルYouTuber #VTuber
花京院ちえりです(/・ω・)/ちえりだよ🍒
視聴者さんはみ~んなちえりーらんど🎡の従業員さん💕
時給200円でゴミ箱を並べるお仕事してね!!!!
【ちえりの怖い話雑談🕯】再生リスト👻
https://youtube.com/playlist?list=PL6a8t58vhcBetKVFJN_GE8kS57OiuIg30
💘気に入っていただけましたら是非チャンネル登録やTwitterフォローお願いします(/・ω・)/
⭐Twitter⭐
https://twitter.com/chieri_kakyoin
実況タグ→ #花京院ちえり
🐻メンバーシップ🐻
https://www.youtube.com/channel/UCP9ZgeIJ3Ri9En69R0kJc9Q/join
メンバー限定の配信や配信で使えるスタンプなどがあります
ちえりのこと好きな人がうれしくなることをやっていきます!
🎵オリジナル曲が各配信サイトで配信開始されました!
MVもみてねみてねっ!
♪めるへんちぇりっく
https://www.youtube.com/watch?v=cmPY2ko9_oM
iTunes【 https://music.apple.com/jp/album/1577505626 】
Amazon【 https://www.amazon.co.jp/dp/B099ZHWYRY 】
♪cherry UP!
https://www.youtube.com/watch?v=XiUHQiQRToo
iTunes【 https://music.apple.com/jp/album/cherry-up-single/1577608284 】
Amazon【 https://www.amazon.co.jp/-/jp/dp/B09B2MML73/ 】
その他
AppleMusic / Spotify / YouTube Music にて配信中!
。⑅୨୧┈┈┈┈┈┈┈┈┈୨୧⑅。
❕お願い❕
助けてほしいことがあったら分かりやすくヘルプを出すのでそれまではネタバレや指示コメントなどは控えていただけると助かります!
その他、誹謗中傷や荒らし目的のコメント、スパム等はこちらで判断し対応しますので見かけた場合もリスナー同士での会話や衝突を避けるためにスルーでお願いします!
常にかわいくあれ⸜( ˙▿˙ )⸝
ちえりも毎日心がける!!
。⑅୨୧┈┈┈┈┈┈┈┈┈୨୧⑅。
💛Super Chat💛
皆様からの応援いつも心から感謝しています!
ありがとうございます!
これからもっともっと成長していきます(o*。_。)oペコッ
。⑅୨୧┈┈┈┈┈┈┈┈┈୨୧⑅。
🏢.LIVE🏢
https://twitter.com/dotLIVEyoutuber
short o 在 Pin on kindergarten - Pinterest 的推薦與評價
Find short vowel worksheets, games, and activities too. ... Short Vowel Sound 'O' List Phonics Reading, Teaching Phonics, Teaching Reading,. education_com. ... <看更多>