IT |
ITmedia 総合記事一覧 |
[ITmedia News] 一眼レフの時代は終わったのか? 今になってミラーレス一眼に主力がシフトする理由 |
https://www.itmedia.co.jp/news/articles/2208/21/news055.html
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itmedia |
2022-08-21 14:40:00 |
AWS |
AWS Japan Blog |
需要計画のためのインテリジェントオートメーション |
https://aws.amazon.com/jp/blogs/news/intelligent-automation-for-demand-planning/
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ligentautomationfordeman |
2022-08-21 05:58:26 |
python |
Pythonタグが付けられた新着投稿 - Qiita |
plotlyのshow()でvscodeのJupyter上でうまく表示できない時に・・ |
https://qiita.com/ku_a_i/items/19273b315365952bbad1
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github |
2022-08-21 14:28:58 |
python |
Pythonタグが付けられた新着投稿 - Qiita |
Python I/Oの再考(3): I/Oストリームのクラス階層 |
https://qiita.com/mingchun_zhao/items/9d68b18a0ea2041251da
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pythonio |
2022-08-21 14:21:39 |
python |
Pythonタグが付けられた新着投稿 - Qiita |
Pipfile と Pipfile.lock から同等なrequirements.txtを出力する |
https://qiita.com/lzpel/items/eb14193d531b4283460b
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pathdirnameospathrealpath |
2022-08-21 14:19:03 |
python |
Pythonタグが付けられた新着投稿 - Qiita |
Python pre-commitのblackでcannot import name '_unicodefun' from 'click' |
https://qiita.com/Sicut_study/items/194990db73e310dc33d1
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black |
2022-08-21 14:15:23 |
js |
JavaScriptタグが付けられた新着投稿 - Qiita |
Twitterの特定のユーザーの画像を全てDLするだけ |
https://qiita.com/cp20/items/3eb5764f91350551b35f
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twitter |
2022-08-21 14:32:49 |
js |
JavaScriptタグが付けられた新着投稿 - Qiita |
異なった高さの縦長の要素2つ、スクロールはじめと終わりをぴったり揃える。 |
https://qiita.com/utah_zebra/items/b084074c54c100efc27c
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height |
2022-08-21 14:31:59 |
js |
JavaScriptタグが付けられた新着投稿 - Qiita |
JavaScriptのクリックイベントのアクションが実行されない |
https://qiita.com/Sicut_study/items/d77be896fa70805705a6
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javascript |
2022-08-21 14:29:35 |
Ruby |
Rubyタグが付けられた新着投稿 - Qiita |
Rails7をちょっと試す(turbo_frame_tag でページの表示を速くする編) |
https://qiita.com/suketa/items/0ecb0cb1549241145810
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turboframetag |
2022-08-21 14:58:27 |
Ruby |
Rubyタグが付けられた新着投稿 - Qiita |
Gitコマンドでrbenv version ruby-2.7.4' is not installedtというエラーが出る |
https://qiita.com/Sicut_study/items/7cc1ae1ee8a53564ddb1
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sionrubyxisnotinstalledt |
2022-08-21 14:26:01 |
Linux |
Ubuntuタグが付けられた新着投稿 - Qiita |
Ubuntuを再インストールすると指定したファイルはありませんとエラーになる |
https://qiita.com/Sicut_study/items/439bf7e62aefd0151d62
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ubuntu |
2022-08-21 14:00:59 |
AWS |
AWSタグが付けられた新着投稿 - Qiita |
OurPhotoの技術スタックを一挙公開!~改善活動の積み重ねでサービスの拡充を担う~ |
https://qiita.com/tatsukoni/items/4d6608611dd204b9be48
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mampa |
2022-08-21 14:25:51 |
AWS |
AWSタグが付けられた新着投稿 - Qiita |
kubernetesでデプロイの更新をしたがPendingで止まってしまう |
https://qiita.com/Sicut_study/items/29179246c65e8cba19e5
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kubernetes |
2022-08-21 14:07:06 |
AWS |
AWSタグが付けられた新着投稿 - Qiita |
EKSでconnectex: a socket operation was attempted to an unreachable networkというエラーが出る |
https://qiita.com/Sicut_study/items/6e903c8866427a9ccecd
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connect |
2022-08-21 14:05:47 |
AWS |
AWSタグが付けられた新着投稿 - Qiita |
Athenaでパーティション射影を使って、Microsoft365の監査ログを見る |
https://qiita.com/a_b_/items/2d2822988f161de37d04
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athena |
2022-08-21 14:00:20 |
Docker |
dockerタグが付けられた新着投稿 - Qiita |
VSCodeのGoの拡張機能でエラーがでる (DockerでGoをやるうえでの注意) |
https://qiita.com/Sicut_study/items/4b00c64c067df43260e9
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docker |
2022-08-21 14:39:17 |
Docker |
dockerタグが付けられた新着投稿 - Qiita |
DockerでGoのパッケージが読み込めない(自作パッケージが読み込めない) |
https://qiita.com/Sicut_study/items/26ee6e9c31ab95511dbc
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docker |
2022-08-21 14:33:09 |
Docker |
dockerタグが付けられた新着投稿 - Qiita |
VPNにつなげるとdocker-compose upでのインストールで止まる |
https://qiita.com/Sicut_study/items/88216ee9a928986dea49
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dockercomposeup |
2022-08-21 14:22:39 |
golang |
Goタグが付けられた新着投稿 - Qiita |
MySQLでsql: Scan error on column index 1, name "created_at": unsupported Scan, storing driver.Value type []uint8 into type *time.Time |
https://qiita.com/Sicut_study/items/ea9c692211a94e5b5c88
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|
2022-08-21 14:44:23 |
golang |
Goタグが付けられた新着投稿 - Qiita |
VSCodeのGoの拡張機能でエラーがでる (DockerでGoをやるうえでの注意) |
https://qiita.com/Sicut_study/items/4b00c64c067df43260e9
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docker |
2022-08-21 14:39:17 |
golang |
Goタグが付けられた新着投稿 - Qiita |
DockerでGoのパッケージが読み込めない(自作パッケージが読み込めない) |
https://qiita.com/Sicut_study/items/26ee6e9c31ab95511dbc
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docker |
2022-08-21 14:33:09 |
Linux |
CentOSタグが付けられた新着投稿 - Qiita |
rsyslogによるログ送信および受信設定(Cent8.3) |
https://qiita.com/Higemal/items/5a35a9c4392c4f4611e0
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centos |
2022-08-21 14:44:24 |
Git |
Gitタグが付けられた新着投稿 - Qiita |
Gitコマンドでrbenv version ruby-2.7.4' is not installedtというエラーが出る |
https://qiita.com/Sicut_study/items/7cc1ae1ee8a53564ddb1
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sionrubyxisnotinstalledt |
2022-08-21 14:26:01 |
Ruby |
Railsタグが付けられた新着投稿 - Qiita |
Rails7をちょっと試す(turbo_frame_tag でページの表示を速くする編) |
https://qiita.com/suketa/items/0ecb0cb1549241145810
|
turboframetag |
2022-08-21 14:58:27 |
Ruby |
Railsタグが付けられた新着投稿 - Qiita |
Gitコマンドでrbenv version ruby-2.7.4' is not installedtというエラーが出る |
https://qiita.com/Sicut_study/items/7cc1ae1ee8a53564ddb1
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sionrubyxisnotinstalledt |
2022-08-21 14:26:01 |
海外TECH |
DEV Community |
Go - Pointers, User input |
https://dev.to/vchiranjeeviak/go-pointers-user-input-4mh9
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Go Pointers User input IntroductionThis is the part of the Go lang series In the previous part we saw what variables constants and datatypes are Check Part if you missed it In this one lets see what pointers are and how we can take input from the user who is running the program Before going into pointers very important to understand pointers Before understanding pointers we need to understand how the program execution works It is different from language to language and it will be similar for some languages Some programming languages interact with computer memory and some don t So What memory are we talking about It is Random Access Memory RAM MemoryAny high level program or software is basically stored in hard disk to use it whenever needed The programs written in these type of languages are loaded into RAM when we want to run and then each line of code starts running there Any memory needed to run that like storing variables constants etc is also taken from RAM Sometimes some data used by a running program can be stored in cache or in secondary memory which is hard drive depending on few factors Some languages like Java Javascript Python etc have their own runtime environments These runtime environments act as an interface between programs and actual memory They still use primary memory to run but not directly They actually use something called virtual memory which maps to actual main memory of system The addresses will be different for actual and virtual and can be mapped only by these runtime environments which is a very low level implementation This is bit out of the way to our intention of this article So let s continue with RAM for now since Go doesn t use any runtime environment and directly interacts with system memory Memory animation AddressesSo now that we know that programs especially of C C Go run in RAM and these use some memory to store data required to run The unit of memory is bytes And byte bits A bit can contain either or Each byte in a memory device can be uniquely identified by its address The address will be of the form Hexadecimal Something like xXF And there is an order for these addresses because the memory is continuous Can we see the address of a variable programatically Yes we can do by using the amp operator On a side note an operator is a symbol which performs a special operation on some data operands and the number of operands is dependent on the operator amp operator is applied on only one operand hence it belongs to unary operators group There are other groups like binary operators operands and ternary operators operators So the only operand that amp ampersand address operator takes is the variable name Program to find address of a variableAn example program to get the address of a variable package mainimport fmt func main someVariable fmt Println someVariable This prints value of someVariable fmt Println amp someVariable This prints address of someVariable Output This output of address will be different for system to system Even we get different address value every time we run PointersSo now we know how and where data variables constants is being stored This is where pointers come into picture DefinitionPointer is just another datatype like int string boolean But what a variable of type pointer stores is address We saw how addresses look like in above output A pointer stores those kind of address Whose address they store We can store addresses of other variables and constants Questions to keep in mind for futureWhat is the point of storing addresses How are pointers useful Are pointers good or bad These are valid questions To know the answers we need to go deeper into learning this language We will find out answers to each of these questions in future articles These questions are highlighted as topics in future articles So do wait check if they are already published by me Pointer of pointerWe saw that a pointer variable stores addresses So it is just like any other variable which means that it is also stored in memory which means that a pointer variable also has an address which means that this address value can be stored in other pointer which is called pointer of pointer I hope you got an idea on pointers You will be more confident when you get to know the answers to the above questions So just keep this concept in mind User inputNow that we are comfortable with the concept of addresses and how variables are stored it is a perfect time to know how to take input from user while program is running run time As we discussed in previous articles even though we are not having a value while writing program and taking that value from user in run time we need to reserve some space in our program memory to store it when program receives it And we do that by declaring not initialising check Part a variable for this value ScanThe function we use to take user input is Scan It belongs to the same fmt package to which Print also belongs If I forgot to convey that fmt is short for format now you know So we pass the address I hope you know how to get address of a variable from above part of article of the variable in which we want to store the input value to the Scan function This function pauses the program execution when it reaches that line and waits for user to give the input Once the user gives input and hits Enter it resumes from there Program to illustrate user inputAn example program which takes a number as input from user and prints the next number to the screen package mainimport fmt func main var number int declaring integer variable fmt Scan amp number we pass address using amp The program execution pauses here until user provides input and hits enter fmt Println number Printing next number It will wait like this until you give some number to it and hit Enter If you give other than a int number it throws an error I gave as input and hit Enter Here is the output User input in Go C C vs Python Java JavascriptThis is how we take user input in run time We can learn this concept in the introductory class video article of languages like python or java It is because that there is no concept of interacting with memory in them So there are no addresses in them But Go has this like C C and so we had to learn about addresses first ConclusionThat s it for this one Next article conditionals and loops in Go Do follow me to see them Make sure you like and share if you felt this good Let s connect on Twitter LinkedIn Showwcase |
2022-08-21 05:53:41 |
海外ニュース |
Japan Times latest articles |
No fuel, no hope: Sri Lankans flee crisis in mass brain drain |
https://www.japantimes.co.jp/news/2022/08/21/asia-pacific/sri-lanka-brain-drain/
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economic |
2022-08-21 14:36:06 |
海外ニュース |
Japan Times latest articles |
China’s hyped decoupling from emerging markets may prove a blip |
https://www.japantimes.co.jp/news/2022/08/21/business/financial-markets/china-stocks-emerging-markets/
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China s hyped decoupling from emerging markets may prove a blipA gulf opened between Chinese stocks and the rest of emerging market equities as pandemic recoveries diverged but that split may be short lived |
2022-08-21 14:05:23 |
海外ニュース |
Japan Times latest articles |
Nine by La Cime leads the way as dining out in Tokyo regains its sheen |
https://www.japantimes.co.jp/life/2022/08/21/food/nine-by-la-cime/
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Nine by La Cime leads the way as dining out in Tokyo regains its sheenWhile Tokyo foodies may celebrate this season s arrival of star chefs from Osaka Peru and beyond a few beloved restaurants also closed shop for good |
2022-08-21 14:00:53 |
ニュース |
BBC News - Home |
UFC 278: Leon Edwards shocks Kamaru Usman to win UFC welterweight title |
https://www.bbc.co.uk/sport/mixed-martial-arts/62622010?at_medium=RSS&at_campaign=KARANGA
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edwards |
2022-08-21 05:42:54 |
北海道 |
北海道新聞 |
トルコで交通事故相次ぎ35人死亡 救急隊や記者も |
https://www.hokkaido-np.co.jp/article/720103/
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交通事故 |
2022-08-21 14:40:49 |
北海道 |
北海道新聞 |
コロナ感染者累計、日本は世界10位 「第7波」の勢い続く |
https://www.hokkaido-np.co.jp/article/720067/
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集計 |
2022-08-21 14:32:31 |
北海道 |
北海道新聞 |
逮捕の中3少女「死刑になりたくて」 東京・渋谷の母娘刺傷 |
https://www.hokkaido-np.co.jp/article/720161/
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東京都渋谷区 |
2022-08-21 14:22:27 |
北海道 |
北海道新聞 |
クリミア防空システム稼働と市長 無人機攻撃後 |
https://www.hokkaido-np.co.jp/article/720190/
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防空 |
2022-08-21 14:23:00 |
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