投稿時間:2023-06-11 08:09:38 RSSフィード2023-06-11 08:00 分まとめ(10件)

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IT	ITmedia 総合記事一覧	[ITmedia ビジネスオンライン] 関西空港で「土産物難民」急増　訪日客には分からない日本人の心理	https://www.itmedia.co.jp/business/articles/2306/11/news041.html	itmedia	2023-06-11 07:38:00
海外TECH	DEV Community	EXTREMELY SIMPLE & LOGICAL JAVA SOLUTION BEATS 85% IN RUNTIME	https://dev.to/verisimilitudex/extremely-simple-logical-java-solution-beats-85-in-runtime-23ba	EXTREMELY SIMPLE amp LOGICAL JAVA SOLUTION BEATS IN RUNTIME IntuitionThe problem asks us to find the number of good pairs in an array A good pair is defined as a pair i j where lt i lt j lt nums length and nums i nums j In other words we need to count the number of occurrences of the same element in the array that have a lower index than another occurrence of the same element ApproachOne simple approach to solve this problem is to use nested loops to compare each pair of elements in the array and count the good pairs The outer loop iterates over each element in the array and the inner loop starts from the next element and compares it with the current element If the elements are equal we increment the count of good pairs ComplexityTime complexity O n The nested loops iterate over all pairs of elements in the array resulting in a quadratic time complexity Space complexity O We are using a constant amount of extra space to store the count of good pairs Codeclass Solution public int numIdenticalPairs int nums int goodPairs for int i i lt nums length i for int j i j lt nums length j if nums i nums j goodPairs return goodPairs Note This code snippet is in Java	2023-06-10 22:48:46
海外TECH	DEV Community	Interesting JavaScript Features from a Ruby Perspective	https://dev.to/samuelodan/interesting-javascript-features-from-a-ruby-perspective-k2e	Interesting JavaScript Features from a Ruby PerspectiveHi there I recently began relearning JavaScript as it had been a year since I last did anything meaningful with it So I thought to share some of the differences that stood out to me as a Ruby developer There should be a part so you might want to watch out for that if you find this one entertaining Enough said Let s jump right to the first difference No Error for Calling an Undefined Method or PropertyIn Ruby your program raises a NoMethodError when you call an undefined method on an object It is different however in JavaScript as it silently returns undefined without raising an error This leads to the next observation Optional ChainingSince JavaScript handles undefined methods and properties differently the use of optional chaining safe navigation in Ruby is affected as well Let s look at an example Say we have a user who unbeknownst to us doesn t have a current account and we want to safely check their current account balance this is how we can do that in JavaScript is the optional chaining operatoruser currentAccount balance gt undefinedAnd in Ruby amp is the safe navigation operatoruser amp current account amp balance gt nilNotice that we had to use the operator twice in Ruby to avoid an error in case current account was not a valid defined method for the user object Accessing the Last Array ElementIf you re coming from Ruby you may instinctively try array but it ll return undefined So to actually get the last element in a JS array you have to do array array length or less preferablyarray slice Using slice this way looks hacky and you wouldn t be able to modify the element in place since it returns a new array With Ruby however you simply do array or to modify the element array new last element Incrementing NumbersJavascript has an increment operator that you can use instead of doing something like num or num num However Ruby does not have such an operator so you have to use num Function Parameters are Optional by DefaultIn JavaScript missing arguments become undefined instead of raising an exception Ruby however will raise an ArgumentError Let s look at an example In JavaScript passing only one argument instead of twofunction greet timeOfDay name return Good timeOfDay name greet morning gt Good morning undefinedIn Ruby def greet time of day name Good time of day name endgreet morning gt wrong number of arguments given expected ArgumentError No none Even Though There s every JavaScript Arrays have every and some predicate methods just like Array all and Array any in Ruby but unlike JavaScript Ruby Arrays have a none method which is the opposite of any You might achieve a similar effect in JavaScript by either defining a none function let none array callback gt array some callback and use it like solet arr let result none arr item gt item gt gt trueor simply negating the call like so arr result array some item gt item gt gt trueIn Ruby though you write the same logic this way arr result arr none item item gt gt true Array forEach returns undefinedThis might seem intuitive and it probably is but in Ruby Array each returns self which is the object the method was called on Here s an example In JavaScript const letters a b c result letters forEach letter gt console log letter result gt undefinedIn Ruby letters a b c result letters each letter puts letter result gt a b c Alright That s the last one I hope you found these rather interesting or insightful Thanks for reading Until next time	2023-06-10 22:05:06
ニュース	BBC News - Home	Champions League final 2023: Fans react to Manchester City's win against Inter Milan	https://www.bbc.co.uk/news/uk-65868100?at_medium=RSS&at_campaign=KARANGA	milan	2023-06-10 22:03:59
ニュース	BBC News - Home	The Papers: 'General election now' and 'allies abandon Johnson'	https://www.bbc.co.uk/news/blogs-the-papers-65869129?at_medium=RSS&at_campaign=KARANGA	resignation	2023-06-10 22:44:12
ニュース	BBC News - Home	Manchester City's Treble 'written in the stars' says Pep Guardiola after Champions League win	https://www.bbc.co.uk/sport/football/65868994?at_medium=RSS&at_campaign=KARANGA	Manchester City x s Treble x written in the stars x says Pep Guardiola after Champions League winManchester City s Champions League success was written in the stars says manager Pep Guardiola after his side seal the Treble in Istanbul	2023-06-10 22:47:06
ニュース	BBC News - Home	British trio Ellie Scotney, Sunny Edwards & Nina Hughes win world title fights	https://www.bbc.co.uk/sport/boxing/65854807?at_medium=RSS&at_campaign=KARANGA	British trio Ellie Scotney Sunny Edwards amp Nina Hughes win world title fightsEllie Scotney becomes IBF super bantamweight champion in just her seventh professional fight while fellow Britons Sunny Edwards and Nina Hughes defend their world titles	2023-06-10 22:26:36
ビジネス	東洋経済オンライン	正しさより｢優しさを選ぶ人｣人生のゴールが違う がんの悩みを乗り越えた人が手にする生き方 | 医療・病院 | 東洋経済オンライン	https://toyokeizai.net/articles/-/676454?utm_source=rss&utm_medium=http&utm_campaign=link_back	人間関係	2023-06-11 07:30:00
ニュース	Newsweek	「スカートの中で手が...」 クルーズ船内で、娘に「性的虐待」を行う父親の姿が監視カメラに捉えられていた	https://www.newsweekjapan.jp/stories/world/2023/06/post-101860.php		2023-06-11 07:30:00
ニュース	THE BRIDGE	台湾TNL Media Group（関鍵評論）と日本のメディアジーンが合併、来年SPAC上場へ——20媒体、読者6,000万人規模に	https://thebridge.jp/2023/06/tnl-media-gooup-mediagene-merged-for-us-ipo-via-spac	台湾TNLMediaGroup関鍵評論と日本のメディアジーンが合併、来年SPAC上場へー媒体、読者万人規模にTNLMediaGroup関鍵評論網媒体集団は日、日本のデジタルメディアグループであるメディアジーンと月に合併し、社名をTNLMediageneに変更したと発表した。	2023-06-10 22:00:40