投稿時間:2023-05-03 11:08:48 RSSフィード2023-05-03 11:00 分まとめ(10件)

カテゴリー等	サイト名等	記事タイトル・トレンドワード等	リンクURL	頻出ワード・要約等/検索ボリューム	登録日
TECH	Techable（テッカブル）	新たなライフスタイルと出会える、体験型VR空間「360Media」リリース	https://techable.jp/archives/205253	camphack	2023-05-03 01:00:50
python	Pythonタグが付けられた新着投稿 - Qiita	PySimpleGUIで連打くんを自作した	https://qiita.com/nekocat777/items/8d993f3b971eddb7d59a	pympipinstallpysimplegui	2023-05-03 10:49:43
AWS	AWSタグが付けられた新着投稿 - Qiita	別AWSアカウントのEC2インスタンスをまるっとさくっと複製する	https://qiita.com/keke21/items/03b6c7c5670ce8174f71	複製	2023-05-03 10:11:11
Docker	dockerタグが付けられた新着投稿 - Qiita	Error response from daemon: cannot stop container: ***: permission denied	https://qiita.com/uyiromo/items/6d1c7a6237b4bb337be4	tainernginxpermission	2023-05-03 10:17:40
海外TECH	DEV Community	Practical Intro to Operator Overloading in Dart	https://dev.to/ethiel97/practical-intro-to-operator-overloading-in-dart-58eh	Practical Intro to Operator Overloading in Dart IntroductionOperator overloading is a quite powerful popular and common concept and feature in Object Oriented world For people not familiar with that it allows developers to redefine and customize the behavior of standard operators etc when used on user created objects Several object oriented languages like Dart Java C come with built in support for it In traditional programming these operators are defined to work with built in data types such as integers floats and strings However operator overloading allows you to define the behavior of these operators on your own objects For example if you have a class that represents complex numbers you can define how the addition and subtraction operators work on instances of that class How it works SyntaxClassRoom operator Object o Your logic here Here are some key points to note about the syntax the reserved keyword operator and the specific operator we want to overload the plus operator in this case the operands Object o is the right hand side operand and the class we overload the operator on is the left hand side one the return type ClassRoom the function should return Now that the concepts and syntax are clearly defined let s get to a practical example Let s assume we have a classroom with some students we want to keep track of We also want to add new students to the classroom We should have one class to represent the ClassRoom and another one for the User class ClassRoom final List lt Student gt students ClassRoom this students class Student final String name final int age Student this name this age override String toString return Student name name age age Let s overload the operator to fit our use case ClassRoom operator List lt Student gt others List lt Student gt students this others return ClassRoom students Now your Student class should look like the following class Student final String name final int age Student this name this age ClassRoom operator List lt Student gt others List lt Student gt students this others return ClassRoom students override String toString return Student name name age age the reserved keyword operator and the specific operator we want to overload the plus operator in this case the return type ClassRoom we add the current student to the list of the students and return it From now on every time we can use the plus operator like the following ClassRoom classRoom Student Andrew Student John Student Jane And if we print the classRoom object we should get Student name Andrew age Student name John age Student name Jane age Another exampleNow let s want to get the older student of the classroom This will get us to overload another operator it can be gt or lt depending on your preference We ll go with gt for simplicity Student operator gt Student other return age gt other age this other The syntax is pretty much the same the reserved keyword operator and the specific overloaded operator gt the return type Student we want to return the oldest student so we compare the current student s age with his comrade s one and return the greatest one Now we can use our operator like the following Student oldest classRoom students reduce prev student gt prev gt student The reduce method reduces a list to a single value based on the provided function We return the oldest student in the class room If we print oldest we should get the expected result Student name Andrew age ConclusionWith those above examples we have seen how powerful operator overloading is and how concise and easier to read it can make our code by allowing you to use familiar operators with our custom objects However it s important to use operator overloading judiciously and with care as it can lead to code that is difficult to understand and maintain if overused or used incorrectly For additional resources you can head to the following links Dart official documentationPacktpub AcknowledgmentsThanks to the author of this article since he s inspired mine	2023-05-03 01:28:04
Apple	AppleInsider - Frontpage News	Apple Maps redesign expected to go live in Taiwan in June	https://appleinsider.com/articles/23/05/03/apple-maps-redesign-expected-to-go-live-in-taiwan-in-june?utm_medium=rss	Apple Maps redesign expected to go live in Taiwan in JunePublic testing of redesigned Apple Maps for Taiwan has begun but the full release isn t expected until June Apple Maps image of Taipei Taiwan Image source Justin O BeirneFirst party mapping data collected by Apple enables detailed maps with greenery and D buildings This redesigned version of Apple Maps began rolling out in and is different from the Detailed City Experience introduced in Read more	2023-05-03 01:48:02
ニュース	BBC News - Home	Man arrested outside Buckingham Palace	https://www.bbc.co.uk/news/uk-65464885?at_medium=RSS&at_campaign=KARANGA	grounds	2023-05-03 01:48:05
ニュース	BBC News - Home	Suspect in Texas neighbour shooting arrested - reports	https://www.bbc.co.uk/news/world-us-canada-65464937?at_medium=RSS&at_campaign=KARANGA	shoot	2023-05-03 01:41:51
ビジネス	東洋経済オンライン	｢アジフライ専門店｣じわり全国へ広がる意外な訳 アジの“聖地"長崎県松浦市の奮闘もあった | 外食 | 東洋経済オンライン	https://toyokeizai.net/articles/-/667726?utm_source=rss&utm_medium=http&utm_campaign=link_back	東洋経済オンライン	2023-05-03 10:30:00
海外TECH	reddit	Take care of my brother for me, NRC ✌️	https://www.reddit.com/r/NightRavenCollege/comments/13669su/take_care_of_my_brother_for_me_nrc/	Take care of my brother for me NRC ️ submitted by u curiousanon to r NightRavenCollege link comments	2023-05-03 01:12:58