投稿時間:2022-02-27 06:18:01 RSSフィード2022-02-27 06:00 分まとめ(23件)

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TECH	Engadget Japanese	1996年2月27日、最初のポケモンとなる「ポケットモンスター赤・緑」が発売されました：今日は何の日？	https://japanese.engadget.com/today27-203006692.html	育成	2022-02-26 20:30:06
python	Pythonタグが付けられた新着投稿 - Qiita	PythonでQRコードを作成する	https://qiita.com/hareguni/items/abff5782b68a67df3398	PythonでQRコードを作成するはじめに当記事は、プログラミング初心者である筆者の備忘録となります。	2022-02-27 05:11:02
Azure	Azureタグが付けられた新着投稿 - Qiita	Azure Cosmos DB - データの一意性	https://qiita.com/takmot/items/4409642147c2ba84842a	以下PartitionKeyにcategory、Uniquekeysにcolcolを設定した場合の競合パターンイメージ。	2022-02-27 05:48:21
海外TECH	MakeUseOf	Face, Iris, Fingerprint, Password, or PIN: Which Is Most Secure?	https://www.makeuseof.com/face-iris-fingerprint-password-pin-most-secure/	Face Iris Fingerprint Password or PIN Which Is Most Secure Looking to keep your devices locked safely Which is the most secure user authentication method for you to safeguard your smartphones and tablets	2022-02-26 20:30:13
海外TECH	MakeUseOf	What Are Open-Back Earbuds and How Do They Work?	https://www.makeuseof.com/what-are-open-back-earbuds-how-do-they-work/	earbuds	2022-02-26 20:16:13
海外TECH	DEV Community	Cross Validation for Beginners	https://dev.to/rohitgupta24/cross-validation-5gm3	Cross Validation for BeginnersWhile attempting to solve a ML problem we do a train test split If this split is done randomly than it might be possible that some dataset might be completely present in test set and absent from training set or vice versa This reduces the accuracy of model So Cross Validation comes into picture Cross validation is a step in the process of building a machine learning model which helps us ensure that our models fit the data accurately and also ensures that we do not overfit Cross validation is dividing training data into a few parts We train the model on some of these parts and test on the remaining parts Types Of Cross Validationi Leave One Out CV Split a dataset into a training set and a testing set using all but one observation as part of the training set Note that we only leave one observation “out from the training set This is where the method gets the name “leave one out cross validation Use Leave One Out as test set In the second experiment leave out another set and take the rest of the data as training input Repeat the Process Cons Computationally Expensive and results in Low Bias Low Bias For the training and test set we will get good results but when we will try the model on new data accuracy will go low and error rate goes high ii K Fold CV We have some data and we have k value For example number of data and k Hence first samples will be test data In second experiment next will be test data Process will be iterated for times Out of all the iterations we will get accuracies and we can select the best out of Full Codeimport pandas as pdfrom sklearn import model selectionif name main Training data is in a CSV file called train csv df pd read csv train csv we create a new column called kfold and fill it with df kfold the next step is to randomize the rows of the data df df sample frac reset index drop True initiate the kfold class from model selection module kf model selection KFold n splits fill the new kfold column for fold trn val in enumerate kf split X df df loc val kfold fold save the new csv with kfold column df to csv train folds csv index False iii Stratified CV If we have a skewed dataset for classification with positive samples and only negative samples we don t use random k fold cross validation Using simple k fold cross validation for a dataset like this can result in folds with all negative samples In these cases we prefer using stratified k fold cross validation Stratified k fold cross validation keeps the ratio of labels in each fold constant So in each fold we will have the same positive and negative samples Stratified k fold cross validation keeps the ratio of labels in each fold constant import pandas as pdfrom sklearn import model selectionif name main Training data is in a CSV file called train csv df pd read csv train csv we create a new column called kfold and fill it with df kfold the next step is to randomize the rows of the data df df sample frac reset index drop True initiate the kfold class from model selection module kf model selection KFold n splits fill the new kfold column for fold trn val in enumerate kf split X df df loc val kfold fold save the new csv with kfold column df to csv train folds csv index False iv Time Series CV The method that can be used for cross validating the time series model is cross validation on a rolling basis Start with a small subset of data for training purpose forecast for the later data points and then checking the accuracy for the forecasted data points The same forecasted data points are then included as part of the next training dataset and subsequent data points are forecasted Full CodeThat s all folks If you have any doubt ask me in the comments section and I ll try to answer as soon as possible If you love the article follow me on Twitter If you are the Linkedin type let s connect www linkedin com in rohitguptaHappy Coding and Have an awesome day ahead	2022-02-26 20:44:01
海外TECH	DEV Community	A new crypto token swap site	https://dev.to/seedacquire/a-new-crypto-token-swap-site-3afe	A new crypto token swap siteCheckout our newest place ArticFox where you can easily swap your tokens with the smallest fee out there Have questions about it Drop them	2022-02-26 20:34:30
海外TECH	DEV Community	Javascript array methods with examples and combinations	https://dev.to/kevinkh89/javascript-array-methods-with-examples-and-combinations-f4j	Javascript array methods with examples and combinations introductionjavascript Array object has great tools and methods that we can make use of to achieve optimal data processing needed in our projects let s walk through one by one and figure out the mechanics arguments return statements etc concat syntax concat value value concatenate two or more arrays and return a new arraylet arr a b c d let arr e f g h let newArr arr concat arr output a b c d e f g h let newArr i j concat arr arr output a b c d e f g h Tip it won t mutate the original array instead return a new one flat syntax flat depth as the name suggests it will flatten the array by given depth meaning the sub arrays will be concatenating to form a new array it removes empty slots no holes in the returning array specifying infinity as depth would return an array without any sub arrays the default depth is let arr foo bar bear claw orange onion apple let arr arr flat foo bar bear claw orange onion apple let arr arr flat infinity foo bar bear claw orange onion apple Tip it won t mutate the original array instead returns a new one fill syntax fill value start end start index number end index numberthis method changes all elements of the array to a static given value from the start index to an end index it changes the start index and all the elements between the start to the end except the end index the end index is exclusivelet arr let arr arr fill let arr arr flat Tip it will mutate the original array copyWithin syntax copyWithin target start end target index number start index number optional default end index number optional default arr length shallow copies part of the array to a different location in the same array with the given start and end index and returns the modified array it will preserve the array length remember that the end index is not includedlet arr book chair desk table let arr arr copyWithin book book desk table let arr arr copyWithin book chair chair desk Tip it will mutate the original arraywe ll talk about what shallow copy is and how to deal with it in different situations later in this article every syntax every callbackfn this method accepts a function as an argument and iterates over every single value in the array and executes the function every checks every value in the array against a comparison function if all of the callback functions return a truthy value on each element the every method result would be truelet arr check if all items are evenlet test arr every value index arr gt value output trueTip every returns true for an empty array no matter what the condition is filter syntax fill value index arr gt filter returns a new array consisting of elements that have passed a test by the callback function let arr id product mouse countInStock id product keyboard countInStock id product monitor countInStock id product watch countInStock let arr arr filter el index gt el countInStock gt output id product mouse countInStock id product watch countInStock Tip it won t mutate the original array instead returns a new one find syntax find val index arr gt find method iterator over an array and returns the first item that satisfied the testing function otherwise returns undefinedlet arr id product mouse countInStock id product keyboard countInStock id product monitor countInStock id product watch countInStock let element arr find item index gt item countInStock gt output id product monitor countInStock findIndex syntax findIndex item index gt findIndex iterates over the array and returns the index of the first element that satisfies the testing function otherwise this method returns let arr id product mouse countInStock id product keyboard countInStock id product monitor countInStock id product watch countInStock let element arr findIndex item index gt item countInStock gt output let element arr findIndex item index gt item countInStock gt output forEach syntax forEach item index gt forEach execute the function that is provided on each element forEach always returns undefined let arr id product mouse countInStock id product keyboard countInStock id product monitor countInStock id product watch countInStock let element arr forEach item index gt item product mouse amp amp item countInStock arr id product mouse countInStock id product keyboard countInStock id product monitor countInStock id product watch countInStock there is no way to break out of forEach loop includes syntax includes value fromIndex fromIndex index number default includes determines whether the given value is included in the array if so returns true or else false we can give a second argument formIndex to specify an index as a start searching pointlet arr MONEY laptop rug let test arr includes Money output falseTip includes is case sensitive indexOf syntax indexOf value fromIndex fromIndex gt default it s a fairly known method that returns the first index at which the value is located remember if there are a bunch of items with the same value and you haven t specified the second argument fromIndex indexOf returns the first index in case indexOf couldn t find anything it would return the second argument specifies where indexOf should start the searchfromIndex is inclusivelet arr MONEY monitor laptop rug book laptop let arr arr indexOf MONEy output let arr arr indexOf laptop output let arr arr indexOf laptop output indexOf is case sensitive join syntax join separator joining array items separated by or the given separatorlet arr let str arr join output let str arr join output lastIndexOf syntax lastIndexOf item fromIndex fromIndex gt default array length it is the same as indexOf with a little hint lastIndex search backward meaning that the fromIndex default value is array length so any value above array length would return not found fromIndex is inclusivelet arr MONEY monitor laptop mouse laptop book laptop let arr arr lastIndexOf MONEy output let arr arr lastIndexOf laptop output starting at index searching backwardslet arr arr lastIndexOf laptop output fromIndex is inclusiveindexOf is case sensitive map syntax map item index array gt a method to iterate over an array and perform a callback function on each item and return a new array with the values provided by the callback function and the same length as the original array it is one of the most used methods especially in javascript frameworks and libraries e g React order listlet arr id product mouse quantity price id product keyboard quantity price id product monitor quantity price id product watch quantity price let arr arr map product quantity price gt product total quantity price output product mouse total product keyboard total product monitor total product watch total Tip it won t mutate the original array instead returns a new one pop syntax pop removes the last element of the array and returns the element let arr MONEY monitor laptop mouse laptop book laptop let el arr pop output laptop arr MONEY monitor laptop mouse laptop book Tip it will mutate the original array shift syntax shift removes the first element of the array and returns the elementlet arr MONEY monitor laptop mouse laptop book laptop let el arr shift output MONEY arr MONEY monitor laptop mouse laptop book Tip it will mutate the original array push adds one or more elements to the array returning the new length property valuelet arr MONEY monitor laptop mouse laptop book laptop let el arr push flask chair output arr MONEY monitor laptop mouse laptop book flask chair reverse reversing an array and returning a reference to the mutated array let arr MONEY monitor laptop mouse laptop book laptop let el arr reverse output laptop book laptop mouse laptop monitor MONEY el arr gt trueTip it will mutate the original array some syntax some item index array gt some implement a test function on every element if an element passes the test some returns truelet arr id product mouse quantity price id product keyboard quantity price id product monitor quantity price id product watch quantity price let test arr some item gt item price gt output trueTip returning any truthy value in the test function would amount to ture output sort syntax sort firstEl secondEl gt accept a function as an argument optional comparing elements of an array and returning a reference to the sorted array different situation based on the return value of the function firstEl is bigger than secondEl firstEl is smaller than secondEl firstEl is equal to secondElby default sort is a little bit tricky because it converts everything to string then sorts them out let arr let sorted arr sort output the best practice is to implement our testing functionlet arr let ascending arr sort first second gt first second output orlet descending arr sort first second gt second first output Tip it will mutate the original array slice syntax slice start end making a shallow copy and returning a new array both start and end are optional and the default is start end array length but when specified slice makes a shallow copy don t worry we ll talk about shallow copy of the array from start to the end that we specified there is a little hint the end is not includedit s one of the most frequently used methods in libraries frameworks just because of the fact it won t mutate the original array let arr MONEY monitor laptop mouse laptop book laptop let arr arr slice output MONEY monitor laptop mouse laptop book laptop let arr arr slice output monitor laptop mouse Tip it won t mutate the original array instead returns a new one splice syntax splice start deleteCount item item deleting or adding items to the original array splice will change the length and items of the original array and returns the modified array as a reference to the original array the first argument is the index at which we want to start gt default the second argument is how many items we want to delete gt default array length start third argument and so are items that we want to add to the array if there are no items it would just delete the items that we specified let arr MONEY monitor laptop mouse laptop book laptop let arr arr slpice output MONEY mouse laptop book laptop orlet arr arr splice chair honey output MONEY chair honey mouse laptop book laptop arr arr gt true orlet arr arr splice output MONEY arr arr gt trueTip it will mutate the original array ushift syntax unshift item item adds items to the beginning of the original array and returning the length of the modified arraylet arr MONEY monitor laptop mouse laptop book laptop let test arr unshift chair desk output arr chair desk MONEY monitor laptop mouse laptop book laptop Tip it will mutate the original array toString syntax toString converts the items of the array to string and joins them by commalet arr chair let test arr torString output chair flatMap syntax flatMap item index array gt it is a map followed by the flat method with a depth of it executes the function on each item of the array and then flats the array by one level then returns the flatted array let arr let arr arr flatMap item index gt item isArray item item double the items if it s an array double the first item output reduce syntax reduce acc cur index array gt initialValue reduce execute a function on each item of an array then pass the return value to the next function as the first argument acc the final result would be the last value returned by the function executed on the last item of the array last acc with initialValue sets initalValue as the acc on the first element without initalValue sets acc as the first item of the array and cur would be the second item it starts from the second indexlet arr id product mouse quantity countInStock id product keyboard quantity countInStock id product monitor quantity countInStock id product watch quantity countInStock let countAll arr reduce acc cur gt acc countInStock cur countInstock output reduceRight syntax reduceRight acc cur index arry gt it s the same concept as reduce with a little bit of difference reduceRight would start from right to leftfunctionality is the same but starting index is the last index of the array moving forward to the first index let arr let reducer arr reduce acc cur gt acc cur output let reducerRight arr rudeceRight acc cur gt acc cur output Array from syntax Array from array like mapFunction it s an instance method that creates a shallow copy from an array likefor example when selecting a nodelist span div the result is an array like object that we can make a shallow copy by Array form second argument mapFunction is optionalArray from array like mapFunction is the same as Array from array like map mapFunction let nodes document querySelectorAll span let spanArray Array from nodes now we can use any array method on the spanArray Array isArray syntax Array isArray value it s a useful method to check if the given argument is an array or notlet test Array isArray falselet test Array isArray foo bar falselet test Array isArray true Array of syntax Array of value value creates an array by given valueslet arr Array of let arr Array of id product mouse id product mouse there are other array methods enteries keys groupBy it is not supported by major browsers yet you can click the link to learn more about them but it s safe to say that it s used in special circumstances they return an array iterator combinationsnow it s time to see them in action and how we can leverage array methods and combine them to come up with interesting ways for data manipulation filter indexOfquestion an array consists of elements that are in both arr and arr let arr MONEY monitor laptop mouse laptop book laptop let arr money mouse chair desk ice case monitor let result arr filter item index gt arr indexOf item mouse monitor every slicequestion find out if the first five or the last five elements of an array are the same if any return start or end otherwise return falselet arr black black black black black black red red green black black function checkStartorEnd arr let start arr slice every item gt item arr let end arr slice arr length arr length every item gt item arr arr lenth return start start end end false reduce mapquestion sum of goods in electronicslet arr id product mouse dept electronics countInStock id product keyboard dept electronics countInStock id product monitor dept electronics countInStock id product watch dept electronics countInStock id product chair dept furniture countInStock id product desk dept furniture countInStock id product sofa dept furniture countInStock let result arr filter item gt item dept electronics reduce acc cur gt acc cur countInstock Now it s your time to show us your ninja skills how would you combine them follow me on Twitter I d be happy to hear from you	2022-02-26 20:27:11
Apple	AppleInsider - Frontpage News	Hyper Media USB-C Hub review: Ports and physical playback controls arrive on iPad	https://appleinsider.com/articles/22/02/26/hyper-media-usb-c-hub-review-ports-and-physical-playback-controls-arrive-on-ipad?utm_medium=rss	Hyper Media USB C Hub review Ports and physical playback controls arrive on iPadHyper makes a wide array of USB C hubs for Mac and iPad but this one of the first we ve tried that has physical media controls built in alongside a plethora of ports Holding the Hyper Media USB C HubAptly named the Hyper Media USB C Hub this aluminum device is similar to many iPad hubs out there It snaps into the side of your iPad mini iPad Air or iPad Pro and connects via USB C Read more	2022-02-26 20:41:07
Apple	AppleInsider - Frontpage News	How to blur your background in FaceTime calls	https://appleinsider.com/articles/22/01/03/how-to-blur-your-background-in-facetime-calls?utm_medium=rss	How to blur your background in FaceTime callsIf you want to make a video call on FaceTime but don t want to show an untidy room here s how you can set your iPhone iPad or Mac to blur the background Whether working from home or catching up with friends and family you ve likely had to make or take a video call Someone will fire up FaceTime and turn on video so that they can see you and likewise for you to see them Part of the problem with video calling is that sometimes you cannot prepare enough for them If a call is sprung on you you may have enough time to make sure you re presentable but you may not be able to get the room you re currently in to be the same way Read more	2022-02-26 20:39:00
海外TECH	Engadget	Valve says it would happily help Microsoft bring PC Game Pass to Steam	https://www.engadget.com/gaben-microsoft-pc-game-pass-steam-202526306.html?src=rss	Valve says it would happily help Microsoft bring PC Game Pass to SteamValve says it s willing to work with Microsoft to bring PC Game Pass to Steam “I don t think it s something that we think we need to do ourselves building a subscription service at this time Valve CEO Gabe Newell told PC Gamer in a recent interview “But for their customers it s clearly a popular option and we d be more than happy to work with them to get that on Steam Newell s subsequent comments suggest PC Game Pass won t come to Steam anytime soon but that the two companies have had discussions about the possibility “We ve talked to people there quite a bit about that topic he said “If your customers want it then you should figure out how to make it happen That s where we re at While PC Game Pass may never come to Steam there s at least precedent for Microsoft to follow In the summer of publisher Electronic Arts made EA Play its subscription service available on Steam It s worth noting as The Verge points out not every EA Play tier is available through the marketplace and Valve s percent cut of sales could be a contentious issue in any negotiations between itself and Microsoft For what it s worth Microsoft has also expressed an interest in getting Steam onto the Windows app store Last June Microsoft s Panos Panay said Valve would be “very welcome on the marketplace	2022-02-26 20:25:26
ニュース	BBC News - Home	Roman Abramovich gives trustees Chelsea 'stewardship'	https://www.bbc.co.uk/sport/football/60540278?at_medium=RSS&at_campaign=KARANGA	Roman Abramovich gives trustees Chelsea x stewardship x Chelsea s Russian owner Roman Abramovich says he is giving trustees of Chelsea s charitable foundation the stewardship and care of the club	2022-02-26 20:34:37
ニュース	BBC News - Home	Six Nations: England withstand Wales comeback to win 23-19 at Twickenham	https://www.bbc.co.uk/sport/rugby-union/60540410?at_medium=RSS&at_campaign=KARANGA	Six Nations England withstand Wales comeback to win at TwickenhamEngland snuff out a threatening second half comeback to record a fifth successive home Six Nations win over Wales in an untidy game at Twickenham	2022-02-26 20:58:10
ニュース	BBC News - Home	Queen cancels diplomatic reception on advice of Foreign Office	https://www.bbc.co.uk/news/uk-60541528?at_medium=RSS&at_campaign=KARANGA	covid	2022-02-26 20:21:40
ニュース	BBC News - Home	Man City snatch valuable win at Everton after penalty controversy	https://www.bbc.co.uk/sport/football/60441969?at_medium=RSS&at_campaign=KARANGA	Man City snatch valuable win at Everton after penalty controversyPhil Foden restores Manchester City s six point lead at the top of the Premier League but only after Everton are controversially denied a late penalty	2022-02-26 20:38:25
ビジネス	ダイヤモンド・オンライン - 新着記事	物流施設開発「地上げ」で大手業者が狙うのはどこ？狙い目のエリアとやり口に共通点 - 物流危機	https://diamond.jp/articles/-/296536	開発	2022-02-27 05:25:00
ビジネス	ダイヤモンド・オンライン - 新着記事	商船三井社長に聞くロシア事業のリスク制御、「ウクライナ危機でも防御は最大」の根拠は？ - 海運バブル “コロナ最高益”の不安	https://diamond.jp/articles/-/296556	商船三井	2022-02-27 05:20:00
ビジネス	ダイヤモンド・オンライン - 新着記事	兄ウクライナと弟ロシア、因縁と愛憎の歴史的背景を元外交官が解説 - ビジネスを強くする教養	https://diamond.jp/articles/-/297394	武力紛争	2022-02-27 05:15:00
ビジネス	ダイヤモンド・オンライン - 新着記事	「本番に強い子」の親がしている、健全な競争心の育て方 - 才能が伸びる！本当の子育て	https://diamond.jp/articles/-/297324	「本番に強い子」の親がしている、健全な競争心の育て方才能が伸びる本当の子育てすべての子どもには才能がある、これはまぎれもない事実です。	2022-02-27 05:10:00
ビジネス	ダイヤモンド・オンライン - 新着記事	57歳・貯金700万円の男性、1年後に早期退職したら夫婦で旅行や新車は楽しめる？ - お金持ちになれる人、貧乏になる人の家計簿　深野康彦	https://diamond.jp/articles/-/297393	深野康彦	2022-02-27 05:05:00
北海道	北海道新聞	＜社説＞日本の対ロ姿勢　暴挙には毅然と対応を	https://www.hokkaido-np.co.jp/article/650379/	岸田文雄	2022-02-27 05:01:00
ビジネス	東洋経済オンライン	｢冷戦ではない｣この戦いが世界へ与える真の衝撃 ロシアの軍事侵攻の本質と世界経済への多大な影響 | ヨーロッパ | 東洋経済オンライン	https://toyokeizai.net/articles/-/534817?utm_source=rss&utm_medium=http&utm_campaign=link_back	politico	2022-02-27 05:30:00
海外TECH	reddit	Heroic vs FaZe Clan / IEM Katowice 2022 - Semi-Final / Post-Match Discussion	https://www.reddit.com/r/GlobalOffensive/comments/t268gx/heroic_vs_faze_clan_iem_katowice_2022_semifinal/	Heroic vs FaZe Clan IEM Katowice Semi Final Post Match DiscussionHeroic FaZe Clan Inferno Nuke Overpass nbsp FaZe Clan moves on to play G in the Grand Finals Heroic has been eliminated from IEM Katowice nbsp Heroic Liquipedia HLTV Official Site Twitter Facebook Instagram YouTube FaZe Clan Liquipedia HLTV Official Site Twitter Facebook Instagram YouTube IEM Katowice Information Schedule amp Discussion For spoiler free CS GO VoDs check out EventVoDs or r CSEventVods Join the subreddit Discord server by clicking the link in the sidebar nbsp Heroic MAP FaZe vertigo X X dust inferno nuke ancient X X mirage overpass nbsp nbsp MAP Inferno nbsp Team CT T Total Heroic T CT FaZe nbsp Heroic K A D ADR Rating cadiaN stavn TeSeS sjuush refrezh FaZe broky ropz Twistzz jks karrigan Inferno Detailed Stats nbsp nbsp MAP Nuke nbsp Team T CT Total Heroic CT T FaZe nbsp Heroic K A D ADR Rating TeSeS refrezh stavn sjuush cadiaN FaZe karrigan ropz broky jks Twistzz Nuke Detailed Stats nbsp Highlights Broky v Clutch Broky k to put FaZe to on Inferno This thread was created by the Post Match Team Message u Undercover Cactus if you want to join the Post Match Team submitted by u Master of All to r GlobalOffensive link comments	2022-02-26 20:26:05