投稿時間:2023-01-07 03:19:14 RSSフィード2023-01-07 03:00 分まとめ(20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）	3億DL突破！位置情報共有アプリ「友どこ」爆発的な人気の理由とは？	https://techable.jp/archives/188982	待ち合わせ	2023-01-06 17:59:19
AWS	AWS Machine Learning Blog	How Thomson Reuters delivers personalized content subscription plans at scale using Amazon Personalize	https://aws.amazon.com/blogs/machine-learning/how-thomson-reuters-delivers-personalized-content-subscription-plans-at-scale-using-amazon-personalize/	How Thomson Reuters delivers personalized content subscription plans at scale using Amazon PersonalizeThis post is co written by Hesham Fahim from Thomson Reuters Thomson Reuters TR is one of the world s most trusted information organizations for businesses and professionals It provides companies with the intelligence technology and human expertise they need to find trusted answers enabling them to make better decisions more quickly TR s customers span across the …	2023-01-06 17:41:34
golang	Goタグが付けられた新着投稿 - Qiita	【Vue.js + golang】ログイン機能をdockerで構築	https://qiita.com/rirma/items/e2f314866e1f8d6867a3	docker	2023-01-07 02:26:36
海外TECH	MakeUseOf	Start the Year with Cheap Windows and Office Licenses, Pay as Little as $14.20 for Windows 10	https://www.makeuseof.com/discount-windows-office-license-promotion/	licenses	2023-01-06 17:16:19
海外TECH	MakeUseOf	How to Always Open the Windows Terminal as Administrator on Windows	https://www.makeuseof.com/windows-terminal-always-open-administrator/	windows	2023-01-06 17:15:16
海外TECH	DEV Community	C elements that are not supported in C++🚫	https://dev.to/mariamarsh/c-elements-that-are-not-supported-in-c-4i6n	C elements that are not supported in C C is a classic language for developing system software and any software for microprocessors Linux most of Windows and MacOS are written on it If you take any modern wearable gadget or electronic device in most cases they also run under the control of a C program There is a huge amount of code in the world that is written in C and more will be written C is the choice of those who need all the power of C and the flexibility of object oriented programming at the same time Counter Strike StarCraft and World of Warcraft are written in C which means you can combine the performance of C with modern technology Part of the Unity engine is also written in C to get direct access to system memory and resources To briefly describe the difference between these languages C is an improved C These languages have the same syntax and commands but C is more about structural and procedural programming while C is about object oriented In this article I will share a list of C code examples that are not C correct or exhibit some C specific behavior Note that it is in one direction C code which is incorrect from the point of view of C Of course the C language has many significant differences from the C language and it will not be difficult for anyone to give examples of incompatibilities based for example on keywords or other obvious C exclusive features You won t find it on this list My main criterion for choosing examples was that the code should look at first sight innocent enough for a C observer i e not contain conspicuous C exclusives but nevertheless be specific for the C language With C I will mark items that will become irrelevant with the release of C List of Elements In C it is allowed to lose the trailing when initializing a character array with a string literal char s In C such initialization is incorrect C supports tentative definitions In one translation unit you can make multiple external definitions of the same object without an initializer int a int a int a a a Such multiple definitions are not allowed in C The C language allows the definition of external objects of incomplete types provided that the type is redefined and becomes complete somewhere further in the same translation unit struct S s struct S int i At the level of rationale this possibility is most likely only a consequence of the previous paragraph i e support for tentative definitions The above sequence of declarations is incorrect from the point of view of C the C language immediately forbids defining objects of incomplete types In C you can make a non defining entity declaration of an incomplete type void extern void v However the corresponding definition cannot be made in C because void is an incomplete type In C you can t even make a non defining declaration The C language allows variables to be defined with the const qualifier without explicit initialization void foo void const int a In C such a definition is incorrect The C language allows declarations of new types inside the cast operator inside the sizeof operator and in function declarations return types and parameter types int a sizeof enum E A B C enum X D E F The following code uses the declarations made above enum E e B int b e F Such declarations are not allowed in C In C an unfamiliar struct type name mentioned in a function s parameter list is a declaration of a new type local to that function At the same time in the list of function parameters this type can be declared as incomplete and additionally declared to the complete type already in the function body Let the type of struct S not yet be declared at this point void foo struct S p First occurrence of struct S struct S int a s It s still the same struct S p amp s p gt a In this code everything is correct from the point of view of the C language p has the same type as amp s and contains the field a From the point of view of the C language the mention of an unfamiliar class type name in the list of function parameters is also a declaration of a new type However this new type is not local it is considered to belong to the enclosing namespace Therefore from the point of view of the C language the local definition of the type S in the body of the function has nothing to do with the type S mentioned in the parameter list The assignment p amp s is not possible due to a type mismatch The above code is incorrect from a C point of view The C language allows transfer of control to the scope of an automatic variable that jumps over its initialization declaration switch int a case Such a transfer of control is not allowed from the point of view of C Since C implicit blocks have appeared in the C language some statements are themselves blocks and in addition induce nested subblocks For example the for loop itself is a block and the loop body is a separate block nested in the for loop block For this reason the following code is legal in C for int i i lt i int i The variable i declared in the body of the loop has nothing to do with the variable i declared in the head of the loop In the C language in such a situation both the loop header and the loop body form a single scope which excludes the possibility of a nested declaration of i The C language allows the use of meaningless storage class specifiers in declarations that do not declare any objects static struct S int i This is not allowed in C Additionally you can notice that in the C language typedef is also formally just one of the storage class specifiers which allows you to create meaningless typedef declarations that do not declare aliases typedef struct S int i C does not allow such typedef declarations To be fair such declarations in C are not completely meaningless they still declare a struct S type The C language allows explicit repetition of cv qualifiers in declarations const const const int a The code is incorrect from a C point of view C also turns a blind eye to similar over qualification but only through intermediate type names typedef names typical template parameters In C direct copying of volatile objects is not a problem at least from the point of view of formal code correctness void foo void struct S int i volatile struct S v struct S s v s v In C implicitly generated copy constructors and assignment operators do not take volatile objects as arguments In C any integral constant expression with a value can be used as a null pointer constant void p void q This was also the case in C before the adoption of the C standard However in modern C of integral values only the literal null value can act as a null pointer constant but more complex expressions are no longer valid The above initializations are incorrect from a C point of view The C does not support cv qualification for rvalues In particular the cv qualification of a function s return value is immediately ignored by the language Together with the automatic conversion of arrays to pointers this allows you to bypass some rules of constant correctness struct S int a const struct S foo struct S s return s int main int p foo a It s worth noting however that attempting to modify an rvalue in C results in undefined behavior From a C perspective the return value of foo and hence the array foo a retains a const qualification and implicit conversion of foo a to type int is not possible C The C preprocessor is not familiar with literals such as true and false In C true and false are available only as macros defined in the standard header lt stdbool h gt If these macros are not defined then according to the rules of the preprocessor both if true and if false should behave like if At the same time the C preprocessor must naturally recognize true and false literals and its if directive must behave in the expected way with these literals This can be a source of incompatibilities when the C code does not include lt stdbool h gt if trueint a endifThis code is obviously incorrect in C but at the same time it can be easily compiled in C Starting with C the C preprocessor no longer treats the lt literal gt lt identifier gt sequence as independent tokens From the point of view of the C language lt identifier gt in this situation is a literal suffix To avoid this interpretation in C these tokens should be separated by a space define D d int a printf D a This format for printf is correct for C but incorrect from a C point of view Recursive calls of main function are allowed in C but not in C C programs are generally not allowed to use the main function in any way In C string literals are of type char N while in C they are const char N Even if old C supports the conversion of a string literal to type char as an exception this exception only works when applied directly to the string literalchar p amp abcd Such initialization is incorrect from the point of view of C In C a bit field declared as type int without an explicit indication of signed or unsigned can be either signed or unsigned this is implementation defined In C such a bit field is always signed In C typedef type names and struct type tags are in different namespaces and do not conflict with each other For example such a set of declarations is correct from the point of view of the C struct A int a typedef struct B int b A typedef struct C int c C In C there is no separate concept of a tag for class types class names share the same namespace with typedef names and may conflict with them For partial compatibility with C code C allows you to declare typedef aliases that match the names of existing type classes but only if the alias refers to a type class with exactly the same name In the above example the typedef declaration on line is incorrect from a C point of view but the declaration on line is correct In C you can use a field name that matches an existing type name typedef int I struct S I I In C such redefinition of an identifier is not allowed In C an implicit conflict between external and internal linking when declaring the same variable results in undefined behavior but in C such a conflict makes the program ill formed To arrange such a conflict you need to build a rather tricky configuration static int a Internal linking void foo void int a Hides external a has no linking extern int a Because external a is hidden declare a with internal linking Now a is declared with both external and internal linking conflict In C such an extern declaration is ill formed Although there is a separate example in the C language standard for this unusual situation popular C compilers generally do not diagnose this violation The following are examples of differences that I think are trivial well known and uninteresting I include them here for completeness and because they formally satisfy my criterion at first glance the code looks more or less normal to the eyes of a C observer The C language allows implicit conversion of pointers from a void type void p int pp p In C values of enum type are implicitly convertible to and from int type enum E A B C e A e e In C implicit conversion only works one way C The C language supports function declarations without prototypes void foo Declaration without prototype void bar foo In C nested struct type declarations place the name of the internal type in the external enclosing scope struct A struct B int b a struct B b Refers to the type struct B declared on line ConclusionThat in fact is all that has accumulated at the moment I hope you find my observations interesting and they will help someone Do you think I missed something important Feel free to leave any questions comments or suggestions	2023-01-06 17:00:56
Apple	AppleInsider - Frontpage News	iPhone SE 4 allegedly canceled over Apple's 5G modem failures	https://appleinsider.com/articles/23/01/06/iphone-se-4-allegedly-canceled-over-apples-5g-modem-failures?utm_medium=rss	iPhone SE allegedly canceled over Apple x s G modem failuresApple wanted to release an iPhone SE in as a test bed for its in house modem chip but development failures may have led to the cancellation of the budget iPhone Starlight iPhone SEThe rumored iPhone SE was expected to be released within a few years and would resemble the iPhone XR However a new report casts doubt on the next iPhone SE making it through the production pipeline Read more	2023-01-06 17:16:34
Apple	AppleInsider - Frontpage News	Satechi reveals 200W 6-Port USB-C GaN charger at CES 2023	https://appleinsider.com/articles/23/01/06/satechi-reveals-200w-6-port-usb-c-gan-charger-at-ces-2023?utm_medium=rss	Satechi reveals W Port USB C GaN charger at CES Satechi has unveiled a W gallium nitride charger with six ports to charge a Mac iPad and other devices Satechi W chargerAnnounced at CES the charger has six USB C PD ports two USB C Power Delivery and four USB C Power Delivery The next generation gallium nitride GaN technology is roughly three times as efficient as silicon based chargers Read more	2023-01-06 17:33:41
海外科学	NYT > Science	Ken Balcomb, 82, Dies; Revealed the Hidden World of Killer Whales	https://www.nytimes.com/2023/01/06/science/ken-balcomb-dead.html	compassionate	2023-01-06 17:34:42
海外科学	BBC News - Science & Environment	Can the UK's race to space take off?	https://www.bbc.co.uk/news/science-environment-64165996?at_medium=RSS&at_campaign=KARANGA	britain	2023-01-06 17:00:51
金融	金融庁ホームページ	第63回金融トラブル連絡調整協議会　議事次第を公表しました。	https://www.fsa.go.jp/singi/singi_trouble/siryou/20230106.html	Detail Nothing	2023-01-06 17:30:00
ニュース	BBC News - Home	Harry has turned against military, says ex-commander	https://www.bbc.co.uk/news/uk-64185176?at_medium=RSS&at_campaign=KARANGA	chess	2023-01-06 17:15:34
ニュース	BBC News - Home	The key claims made in Spare	https://www.bbc.co.uk/news/uk-64179164?at_medium=RSS&at_campaign=KARANGA	camilla	2023-01-06 17:40:02
ニュース	BBC News - Home	Train drivers offered pay rise in bid to end strikes	https://www.bbc.co.uk/news/business-64191654?at_medium=RSS&at_campaign=KARANGA	drivers	2023-01-06 17:49:24
ニュース	BBC News - Home	Writer Hanif Kureishi seriously injured in fall	https://www.bbc.co.uk/news/entertainment-arts-64188549?at_medium=RSS&at_campaign=KARANGA	beautiful	2023-01-06 17:49:39
ニュース	BBC News - Home	Can the UK's race to space take off?	https://www.bbc.co.uk/news/science-environment-64165996?at_medium=RSS&at_campaign=KARANGA	britain	2023-01-06 17:00:51
ニュース	BBC News - Home	Yorkshire: Lord Patel to step down as chair in March	https://www.bbc.co.uk/sport/cricket/64192124?at_medium=RSS&at_campaign=KARANGA	march	2023-01-06 17:48:35
ビジネス	ダイヤモンド・オンライン - 新着記事	「上から目線」で接してくる人との関係に悩まずに済む、極めてシンプルな方法【書籍オンライン編集部セレクション】 - 嫌われる勇気──自己啓発の源流「アドラー」の教え	https://diamond.jp/articles/-/315639	「上から目線」で接してくる人との関係に悩まずに済む、極めてシンプルな方法【書籍オンライン編集部セレクション】嫌われる勇気ー自己啓発の源流「アドラー」の教え『嫌われる勇気』『幸せになる勇気』の著者・岸見一郎氏と古賀史健氏が、アドラー心理学の教えに基づいて皆さんの悩みにお答えする連載です。	2023-01-07 02:55:00
北海道	北海道新聞	公明・山口代表、訪中見送り　水際強化に中国反発か	https://www.hokkaido-np.co.jp/article/784406/	中国共産党中央対外連絡部	2023-01-07 02:02:00
北海道	北海道新聞	イラン無人機開発の６人制裁　米財務省、ウクライナ侵攻で	https://www.hokkaido-np.co.jp/article/784405/	米財務省	2023-01-07 02:02:00