| python |
Pythonタグが付けられた新着投稿 - Qiita |
Pythonを無料で学習！？ |
https://qiita.com/daichi0412/items/521aa4d5c58795a5205e
|
googledrive |
2022-06-12 18:53:13 |
| python |
Pythonタグが付けられた新着投稿 - Qiita |
【強化学習】分散強化学習を解説・実装（GORILA・A3C・Ape-X） |
https://qiita.com/pocokhc/items/ca83562fc1469b35d67b
|
gorila |
2022-06-12 18:18:08 |
| js |
JavaScriptタグが付けられた新着投稿 - Qiita |
【Vue.js】createdとmountedの違いについて簡単に解説 |
https://qiita.com/D_suke/items/86307ef2176bd8609278
|
mounted |
2022-06-12 18:23:32 |
| js |
JavaScriptタグが付けられた新着投稿 - Qiita |
【js】hasOwnPropertyメソッド |
https://qiita.com/__knm__/items/df0accb226550d661529
|
hasownpropert |
2022-06-12 18:10:03 |
| Ruby |
Rubyタグが付けられた新着投稿 - Qiita |
Ruby on Railsの環境を構築する際のNginx設定ファイルのコマンド及びコード理解 |
https://qiita.com/zakino123/items/bab8119624263c4c0b22
|
defaultconfu |
2022-06-12 18:44:40 |
| AWS |
AWSタグが付けられた新着投稿 - Qiita |
話題のAWS CDK v2を触ってみたい！初めての環境準備からデプロイまで |
https://qiita.com/minorun365/items/526eaf7d63dc51bfaa0e
|
nodejsn |
2022-06-12 18:14:25 |
| Docker |
dockerタグが付けられた新着投稿 - Qiita |
Ruby on Railsの環境を構築する際のNginx設定ファイルのコマンド及びコード理解 |
https://qiita.com/zakino123/items/bab8119624263c4c0b22
|
defaultconfu |
2022-06-12 18:44:40 |
| Git |
Gitタグが付けられた新着投稿 - Qiita |
【Git】私たち、やり直しましょう？ |
https://qiita.com/monaka33/items/ca3bee51453b225d4b2d
|
mergedrevert |
2022-06-12 18:15:45 |
| Ruby |
Railsタグが付けられた新着投稿 - Qiita |
Ruby on Railsの環境を構築する際のNginx設定ファイルのコマンド及びコード理解 |
https://qiita.com/zakino123/items/bab8119624263c4c0b22
|
defaultconfu |
2022-06-12 18:44:40 |
| 技術ブログ |
Developers.IO |
カスタマーマネージドキーで暗号化されたS3オブジェクトにクロスアカウントアクセスする方法 |
https://dev.classmethod.jp/articles/cross-account-access-to-s3-object-encrypted-by-cmk/
|
環境 |
2022-06-12 09:51:57 |
| 海外TECH |
DEV Community |
Retrieving latest asset prices in your React dApp |
https://dev.to/murashow/retrieving-latest-asset-prices-in-your-react-dapp-23i9
|
Retrieving latest asset prices in your React dAppWhat if you need to show in your app today s BTC USD price Or convert the user s balance from ETH to BTC Or are you building an Elon Musk fan site and want to provide the latest Tesla TSLA stock price updates Today we will use Chainlink to retrieve the latest assets prices in a single call and provide it to your app components using React Context Chainlink Data FeedsThe easiest and quickest way to do that is to use the data feed provided by Chainlink We will use the ETH USD pair as an example First we need to find the contract s address for our pair to call to There is a handy address s list for every pair supported by Chainlink In our case the address will be xfeCDfcbdFEfEcb Let s write a function to get the latest price To do that we need to call a contract by its address and provide the ABI We will use Ethers js library to help us with it you could also use Web js it doesn t matter here getLatestPrice tsimport providers Contract BigNumber from ethers const provider new providers JsonRpcProvider infura project id gt const aggregatorVInterfaceABI inputs name decimals outputs internalType uint name type uint stateMutability view type function inputs name description outputs internalType string name type string stateMutability view type function inputs internalType uint name roundId type uint name getRoundData outputs internalType uint name roundId type uint internalType int name answer type int internalType uint name startedAt type uint internalType uint name updatedAt type uint internalType uint name answeredInRound type uint stateMutability view type function inputs name latestRoundData outputs internalType uint name roundId type uint internalType int name answer type int internalType uint name startedAt type uint internalType uint name updatedAt type uint internalType uint name answeredInRound type uint stateMutability view type function inputs name version outputs internalType uint name type uint stateMutability view type function const ETH USD RATE ADDRESS xBFAADDbbacBAf const priceFeed new Contract ETH USD RATE ADDRESS aggregatorVInterfaceABI provider export function getLatestPrice Promise lt BigNumber gt const priceFeed new Contract ETH USD RATE ADDRESS aggregatorVInterfaceABI provider return priceFeed latestRoundData Asset price contextIn order to use the latest price data inside our app we need to create a context that will periodically update the price and provide the value to our components AssetPriceContext tsimport utils from ethers import createContext useEffect useRef useState from react import getLatestPrice from getLatestPrice interface ContextProps conversionDate number null conversionRate number null const UPDATE INTERVAL TIMEOUT minutesexport const DEFAULT CONTEXT ContextProps conversionDate null conversionRate null export const AssetPriceContext createContext lt ContextProps gt DEFAULT CONTEXT export const useAssetPrice ContextProps gt const state setState useState lt ContextState gt DEFAULT CONTEXT const updateInterval useRef lt ReturnType lt typeof setTimeout gt gt const updateAssetPrice async gt let conversionDate null let conversionRate null try const roundData await getLatestPrice conversionDate Number roundData toString conversionRate Number utils formatUnits roundData catch error console log error setState conversionDate conversionRate const startUpdate async gt stopUpdate await updateAssetPrice updateInterval current setInterval async gt await updateAssetPrice UPDATE INTERVAL TIMEOUT const stopUpdate gt if updateInterval current clearInterval updateInterval current useEffect gt startUpdate return stopUpdate return state Use in a componentNow we are ready to use the latest price let s connect context to our app first App tsximport AssetPriceContext useAssetPrice from AssetPriceContext import EthBalance from EthBalance export default function App const assetPrice useAssetPrice return lt AssetPriceContext Provider value assetPrice gt lt div gt lt h gt Chainlink Data Feeds example lt h gt lt EthBalance gt lt div gt lt AssetPriceContext Provider gt And create a simple component to convert our balance from ETH to USD EthBalance tsximport React useContext from react import AssetPriceContext from AssetPriceContext const BALANCE ETH export const EthBalance React FC gt const conversionRate conversionDate useContext AssetPriceContext const balanceUSD conversionRate BALANCE ETH conversionRate const updatedAt conversionDate new Intl DateTimeFormat undefined dateStyle full timeStyle medium format new Date conversionDate return lt div gt lt p gt My balance is BALANCE ETH ETH balanceUSD USD lt p gt lt p gt Updated at updatedAt lt p gt lt div gt Which will result something as follows My balance is ETH USDUpdated at Saturday June at ConclusionChainlink Data Feeds are relatively simple to use yet it is a powerful instrument to connect your dApp to real world data More read is available hereHope you enjoyed this tutorial stay tuned for more |
2022-06-12 09:52:09 |
| 海外科学 |
NYT > Science |
A Restored Painting Recalls the Colosseum’s Christian Past |
https://www.nytimes.com/2022/06/12/world/europe/colosseum-painting-christianity.html
|
A Restored Painting Recalls the Colosseum s Christian PastThe restoration of a wall painting depicting an idealized Jerusalem is a reminder that the Roman monument known best for gladiatorial combat was a sacred Christian space for centuries |
2022-06-12 09:01:48 |
| ニュース |
@日本経済新聞 電子版 |
ロシアのマック後継店「フクースナ」が再開 ロゴも変更
https://t.co/Hfvfq6ejZD |
https://twitter.com/nikkei/statuses/1535920520201310209
|
後継 |
2022-06-12 09:42:42 |
| ニュース |
@日本経済新聞 電子版 |
名古屋市は筆記試験で歴史や数学を廃し時事問題、滋賀県は留学を終えた学生や転職者に配慮し入庁日を柔軟に。公務員人気が低下基調にあるなか自治体が採用に知恵を絞っています。
https://t.co/fmlX9nIIsA |
https://twitter.com/nikkei/statuses/1535917338310098945
|
名古屋市は筆記試験で歴史や数学を廃し時事問題、滋賀県は留学を終えた学生や転職者に配慮し入庁日を柔軟に。 |
2022-06-12 09:30:04 |
| ニュース |
BBC News - Home |
Russia unveils 'tasty' McDonald's substitute |
https://www.bbc.co.uk/news/world-europe-61774475?at_medium=RSS&at_campaign=KARANGA
|
tasty |
2022-06-12 09:47:07 |
| ニュース |
BBC News - Home |
Hajj-Muslim pilgrims face losing out from online booking to Mecca |
https://www.bbc.co.uk/news/business-61752659?at_medium=RSS&at_campaign=KARANGA
|
agents |
2022-06-12 09:08:21 |
| 北海道 |
北海道新聞 |
韓国国防相、日本との対話に意欲 安保協力の「正常化」表明 |
https://www.hokkaido-np.co.jp/article/692617/
|
韓国 |
2022-06-12 18:20:54 |
| 北海道 |
北海道新聞 |
トヨタ勢が１、２位を走行 ルマン２４時間耐久レース |
https://www.hokkaido-np.co.jp/article/692630/
|
耐久レース |
2022-06-12 18:34:00 |
| 北海道 |
北海道新聞 |
山菜採りで遭難か 滝上・上紋峠で男性不明 |
https://www.hokkaido-np.co.jp/article/692628/
|
山菜採り |
2022-06-12 18:30:10 |
| 北海道 |
北海道新聞 |
「技能実習生の人権守れ」 制度廃止訴え、東京でデモ |
https://www.hokkaido-np.co.jp/article/692629/
|
人権侵害 |
2022-06-12 18:30:00 |
| 北海道 |
北海道新聞 |
「ゾウを幸せにする研究会」設立 千葉・市原の動物園、日本初 |
https://www.hokkaido-np.co.jp/article/692619/
|
千葉県市原市 |
2022-06-12 18:09:59 |
| 北海道 |
北海道新聞 |
ロ５―４Ｄ（１２日） 佐藤奨がプロ初勝利 |
https://www.hokkaido-np.co.jp/article/692626/
|
初勝利 |
2022-06-12 18:18:00 |
| 北海道 |
北海道新聞 |
コンサドーレ、タイの至宝スパチョークが加入 １４日から練習に参加 |
https://www.hokkaido-np.co.jp/article/692618/
|
至宝 |
2022-06-12 18:16:39 |
| 北海道 |
北海道新聞 |
東京で１５４６人感染 コロナ、死者なし |
https://www.hokkaido-np.co.jp/article/692624/
|
新型コロナウイルス |
2022-06-12 18:07:00 |
| 北海道 |
北海道新聞 |
新ツアー、シュワーツェル優勝 賞金５億のＬＩＶ招待 |
https://www.hokkaido-np.co.jp/article/692623/
|
優勝賞金 |
2022-06-12 18:07:00 |
| 北海道 |
北海道新聞 |
水泳、５キロは南出と蝦名が優勝 ＯＷＳオーシャンズカップ |
https://www.hokkaido-np.co.jp/article/692622/
|
千葉県館山 |
2022-06-12 18:07:00 |
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