投稿時間:2022-08-05 07:31:14 RSSフィード2022-08-05 07:00 分まとめ(34件)

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python	Pythonタグが付けられた新着投稿 - Qiita	[Python]フォルダ・ファイルのパスを文字列で取得する方法比較（os.getcwd、__file__、os.path.dirname(__file__)）	https://qiita.com/V_lasergun/items/b140077a9c35840ffe51	osgetcwd	2022-08-05 06:51:45
海外TECH	Ars Technica	Twitter subpoenas emails, texts from Tesla bigwigs and Musk’s BFFs	https://arstechnica.com/?p=1871713	bffsbecause	2022-08-04 21:15:31
海外TECH	DEV Community	Pass By Reference Vs Pass By Value	https://dev.to/yohanesss/pass-by-reference-vs-pass-by-value-2b81	Pass By Reference Vs Pass By ValueHi Devs Today we will discuss one of the most fundamental concept in Javascript Pass by Value and Pass by Reference This concept is so important even this question is often pop up in job interview Why is that By understanding how this works it will help us to be a better programmer that can understand the flow of data in the application Before we can dive in into the explanation We must know that in Javascript data types are classified into two categories primitive and non primitive Here is a list primitive data types in Javascript string an array of characternumber integer floats etc boolean true or falsenull empty valuesymbols an unique value or often used as unique identifier that is not equal to any other valueundefined declared variable but the value is still not assigned Meanwhile all objects arrays and functions fall under the category of non primitive data types Okay we got this Let s jump into the explanation Pass by ReferenceLet s take a look at the code below to understand what is pass by reference islet john name John Doe gender male score let JohnDupe john console log JohnDupe name John Doe gender male score console log john name John Doe gender male score Okay we have create a new variable JohnDupe and assign the value from John What happen next if we modify the score of JohnDupe johnDupe score console log JohnDupe name John Doe gender male score console log john name John Doe gender male score Notice that the value score of John is also changed What actually happened When we create John new object we are store the value in the memory within some address And when we assign the value from John to johnDupe actually instead of creating a copy of John JohnDupe value is referencing the value the address of John in the memory To fix the problem above we need to actually create a copy of John and assign it to a new variable and then we can change the score without affecting the original John let john name John Doe gender male score let anotherJohn john anotherJohn score console log john name John Doe gender male score console log anotherJohn name John Doe gender male score In the code above we have copied john using spread operator and then assign it into anotherJohn By creating new object anotherJohn actually store the copied object in the memory with different address from john anotherJohn is not referencing john anymore like before they are completely a different entities To prove that take a look at the code belowlet person name Nicola Tesla gender male let personDupe person let anotherPerson name Nicola Tesla gender male console log person personDupe trueconsole log person anotherPerson falseIn the example above we tried to compare equal person personDupe which will be print true because personDupe is pointing the address from person However when we tried to compare equal person anotherPerson this will be print false because they are not the same object even if they are have the same properties and values This behavior is also same with Array let fruits apple strawberry banana let fruitsDupe fruits let anotherFruits apple strawberry banana console log fruits fruitsDupe trueconsole log fruits anotherFruits falseI have an analogy for having us easier to understanding pass by reference by assuming it as a google sheet google docs Let s say a group of student is given an assignment by a teacher to put their own opinion about global warming The teacher want the format of the assignment to be in a single file John as the class president take the initiative to create a google docs so the student could collaborate easily John then share the link with his classmates Mary is the first student that make a change into the docs and add a bunch of paragraph of her idea about global warming Later that night Suzie opened the google docs and add her own opinion followed by Andy and so on Finally after all the student is finished add their own opinion John shared the google docs to the teacher All is good and the class got an A for the assignment From the case above no matter how many times google docs is modified by students in the end it still be only modifiying one file master file So far so good We are know what is exactly pass by reference is Pass by ValueIf you are already understanding pass by reference you already understanding pass by value is Primitive values such as numbers or strings will actually create a copy const num function passByValue val return val console log passByValue passByValue num passByValue console log num num num In the code above we create a variable num with the value of Also we create a function passByValue which take a value as parameter and add it by If we were trying to run the code above passByValue will return however num variable is still the original value of num is not changed at all I hope this short article will help you to understanding the concept of pass by reference and pass by value The main difference between pass by value and pass by reference is pass by value will create a new space in memory and make a copy of a value Pass by reference however instead of making a copy the value stored in memory gets referenced	2022-08-04 21:55:39
海外TECH	DEV Community	What Makes an Effective Engineer?	https://dev.to/gdbroman/what-makes-an-effective-engineer-1op9	What Makes an Effective Engineer How come Twitter has employees whereas FTX the crypto exchange company grew to B with just engineers If you ask their CEO Sam Bankman Fried this is not an accident In fact many of their and x ers were rejected by bigger employers like Twitter Sam claims these engineers learned to be effective on the job So what makes them special Effective engineers do not work more hours They simply follow simple rules Prioritize High Leverage Work Give Accurate Time Estimates Grow Your TeamI summarized them here	2022-08-04 21:54:29
海外TECH	DEV Community	The Art of Letting Your Devs Step Up w/ Equinix’s Rajah Kalipatnapu	https://dev.to/linearb/the-art-of-letting-your-devs-step-up-w-equinixs-rajah-kalipatnapu-1pce	The Art of Letting Your Devs Step Up w Equinix s Rajah KalipatnapuLike every other team based profession engineering needs leaders But identifying a true tested and proven road for taking a programmer and putting them in a position of managing projects amp priorities is still a work in progress That s why I was so excited to speak with Rajah Kalipatnapu Global Head of Product Engineering at Equinix One of the most experienced minds in building world class engineering orgs Rajah credits his success with focusing on different ways to incrementally identify leaders and empower them to be the managers their business needs and their colleagues admire From his unique perspective on creating CEOs for features to dealing with beloved employees who can t code up to the teams needs Rajah s theories on how and when to let your developers step up to the moment need to be heard Episode Highlights Include Rajah s background What does it mean to be the CEO of a feature How features change when devs take charge Less micromanagement less bad things happening Great employee but not a great dev Molding managers Engineering Insights before anyone else The Weekly Interruption is a newsletter designed for engineering leaders by engineering leaders We get it You re busy So are we That s why our newsletter is light informative and oftentimes irreverent No BS or fluff Each week we deliver actionable advice to help make you whether you re a CTO VP of Engineering team lead or IC a better leader It s also the best way to stay up to date on all things Dev Interrupted from our podcast to trending articles Interact amp our community Discord Get interrupted	2022-08-04 21:47:02
Apple	AppleInsider - Frontpage News	Apple adds new Mophie Powerstation Pro, GaN charger to online store	https://appleinsider.com/articles/22/08/04/apple-adds-new-mophie-powerstation-pro-gan-charger-to-online-store?utm_medium=rss	Apple adds new Mophie Powerstation Pro GaN charger to online storeApple has added several new Mophie products to its online storefront including a W GaN charger with four ports a new large capacity Powerstation Pro battery and several car chargers MophieThe Mophie Powerstation Pro is a mAh battery pack that can charge up your iPhone iPad and other Apple devices The charger offers power output of up to W which is enough to power a MacBook Air Read more	2022-08-04 21:07:01
海外科学	NYT > Science	A Large Object Landed on His Sheep Farm. It Came From Space.	https://www.nytimes.com/2022/08/04/world/australia/spacex-debris-australia.html	A Large Object Landed on His Sheep Farm It Came From Space “It s not something you see every day on a sheep farm a farmer said of the pieces of debris that wound up in rural Australia They are thought to be from a SpaceX spacecraft	2022-08-04 21:10:38
海外科学	NYT > Science	Tourists Are Injured Near Icelandic Volcanic Eruption	https://www.nytimes.com/2022/08/04/world/europe/fagradalsfjall-iceland-volcano-tourists.html	Tourists Are Injured Near Icelandic Volcanic EruptionThe injuries were not serious but they underscored the risks facing tourists who hike to the Fagradalsfjall volcano in southwest Iceland officials said	2022-08-04 21:16:44
海外科学	NYT > Science	Why So Many Cars Have Rats in Them Now	https://www.nytimes.com/2022/08/03/nyregion/new-york-rats-cars.html	yorkers	2022-08-04 21:28:02
海外TECH	WIRED	An Attack on Albanian Government Suggests New Iranian Aggression	https://www.wired.com/story/iran-cyberattack-albania/	nuclear	2022-08-04 21:30:27
ニュース	@日本経済新聞 電子版	NY原油下落、88ドル台に　ウクライナ侵攻前の水準 https://t.co/KJz8HlJXpe	https://twitter.com/nikkei/statuses/1555300480481239043	侵攻	2022-08-04 21:11:45
ニュース	@日本経済新聞 電子版	サッカー日本、「豊作」生んだ2つの育成エンジン https://t.co/oxqVbrkTOr	https://twitter.com/nikkei/statuses/1555298101472423936	豊作	2022-08-04 21:02:18
ニュース	BBC News - Home	Rishi Sunak and Liz Truss row over recession warning in latest TV clash	https://www.bbc.co.uk/news/uk-politics-62430065?at_medium=RSS&at_campaign=KARANGA	truss	2022-08-04 21:17:08
ニュース	BBC News - Home	Brittney Griner: US basketball star jailed for nine years on drug charges	https://www.bbc.co.uk/news/world-europe-62427635?at_medium=RSS&at_campaign=KARANGA	biden	2022-08-04 21:28:02
ニュース	BBC News - Home	Alex Jones to pay damages for Sandy Hook hoax claim	https://www.bbc.co.uk/news/world-us-canada-62427918?at_medium=RSS&at_campaign=KARANGA	school	2022-08-04 21:48:40
ニュース	BBC News - Home	France mulls rescue plan for beluga whale stranded in River Seine	https://www.bbc.co.uk/news/world-europe-62428303?at_medium=RSS&at_campaign=KARANGA	habitat	2022-08-04 21:19:11
ニュース	BBC News - Home	Tory leadership: Highlights from the Battle for Number 10	https://www.bbc.co.uk/news/uk-politics-62428665?at_medium=RSS&at_campaign=KARANGA	members	2022-08-04 21:31:35
ニュース	BBC News - Home	The Hundred - London Spirit v Oval Invincibles: Eoin Morgan stars in plays of the day	https://www.bbc.co.uk/sport/av/cricket/62430577?at_medium=RSS&at_campaign=KARANGA	invincibles	2022-08-04 21:02:36
北海道	北海道新聞	大谷、４戦ぶり２３号ソロ　鈴木は第１試合で適時打	https://www.hokkaido-np.co.jp/article/714379/	大リーグ	2022-08-05 06:23:00
北海道	北海道新聞	バイデン氏、６日連続陽性　新型コロナ、体調は良好	https://www.hokkaido-np.co.jp/article/714374/	陽性	2022-08-05 06:23:21
北海道	北海道新聞	「瀬戸芸」夏会期始まる　海外作家の現地制作も再開	https://www.hokkaido-np.co.jp/article/714377/	瀬戸内海	2022-08-05 06:13:12
北海道	北海道新聞	１９年覇者の渋野が単独首位　全英女子ゴルフ第１日	https://www.hokkaido-np.co.jp/article/714373/	単独首位	2022-08-05 06:13:12
北海道	北海道新聞	米、中国ミサイル発射非難　「無責任」、空母展開継続	https://www.hokkaido-np.co.jp/article/714378/	国家安全保障会議	2022-08-05 06:13:00
北海道	北海道新聞	ＮＹ株反落、８５ドル安　米景気後退への警戒感で	https://www.hokkaido-np.co.jp/article/714375/	景気後退	2022-08-05 06:02:00
北海道	北海道新聞	東日本中心に大雨に注意　東北や北陸、警戒続く	https://www.hokkaido-np.co.jp/article/714376/	非常に激しい雨	2022-08-05 06:02:00
ビジネス	東洋経済オンライン	30年ぶり｢マツダがレース｣に帰ってきた深い訳 次世代を見据えたMAZDA SPIRIT RACINGの活動 | トレンド | 東洋経済オンライン	https://toyokeizai.net/articles/-/607466?utm_source=rss&utm_medium=http&utm_campaign=link_back	mazdaspeed	2022-08-05 06:30:00
ニュース	Newsweek	子供が「歩き回る自由」を守る、日本の政策・価値観・都市計画	https://www.newsweekjapan.jp/stories/world/2022/08/post-99288.php	だから、注意しなければいけないのはドライバーのほうであって、危険にさらされる子供ではないもちろん子供たちも道路に飛び出したりしないよう言い聞かされているけれど。	2022-08-05 06:30:00
ニュース	Newsweek	戦場に散ったラガーマンたち──知られざる「日本ラグビーと戦争」秘話	https://www.newsweekjapan.jp/stories/world/2022/08/post-99286.php	日本ラグビーの黎明期に創部し、関西を中心にラグビーの興隆に大いに貢献した京都帝国大学ラグビー部を主人公に、東大・慶大・早大・明大・同志社大などのライバル校の歩みも交え、戦前・戦中のラガーマンの軌跡をたどる一冊。	2022-08-05 06:20:00