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问题 I am in the process of creating a mobile and web version of an app using ReactJS and iOS respectively. Both of these platforms will pull data down from a Firestore database to use but I am wondering what is the best way to only write business logic once in order to do operations on the database? For instance, on both apps you will click a button that updates a field in the Firestore database, instead of writing the logic to do this in Javascript and then Swift, is there a best practice to

问题 I would like to get data from https://www.goaloong.net/football/6in1 This page contains a table. I tried with: Sub REQUESTXML() Dim XMLHttpRequest As xmlHttp Dim HTMLDoc As New HTMLDocument Dim elem As Object Dim x As Long Set XMLHttpRequest = New MSXML2.xmlHttp XMLHttpRequest.Open "GET", "https://www.goaloong.net/football/6in1", False XMLHttpRequest.send While XMLHttpRequest.readyState = 200 DoEvents Wend Debug.Print XMLHttpRequest.responseText HTMLDoc.Body.innerHTML = XMLHttpRequest

问题 For fun and learning I am trying to build a part-of-speech (POS) tagger with OpenNLP and Lucene 7.4. The goal would be that once indexed I can actually search for a sequence of POS tags and find all sentences that match sequence. I already get the indexing part, but I am stuck on the query part. I am aware that SolR might have some functionality for this, and I already checked the code (which was not so self-expalantory after all). But my goal is to understand and implement in Lucene 7, not

问题 I have the following SSAS Tabular model defined: On the Product table, I have the following measures defined: DeliveryQty2018:= CALCULATE ( SUM ( PurchaseDelivery[PurchaseOrderQuantity] ), ( PurchaseEstimatedWarehouseArrivalDate[PurchaseEstimatedWarehouseArrivalYear] = 2018 ) ) DeliveryQty2019:= CALCULATE ( SUM ( PurchaseDelivery[PurchaseOrderQuantity] ), ( PurchaseEstimatedWarehouseArrivalDate[PurchaseEstimatedWarehouseArrivalYear] = 2019 ) ) Sum DeliveryQty 2018-2020: = FORMAT(

问题 I have a webscraper setup to go through different dates and pull historical stats and save them to a DF. This has worked fine up until today when I tried updating my database. Here is the code: myDate = startDate while myDate < endDate: dateFormat = "{date.month:02}{date.day:02}{date.year}".format(date=myDate) url = "http://www.example.com/?date="+dateFormat driver.get(url) print(url) time.sleep(3) html = driver.page_source So I added the print command just to see what URL it was sending to

问题 I would like to get data from https://www.goaloong.net/football/6in1 This page contains a table. I tried with: Sub REQUESTXML() Dim XMLHttpRequest As xmlHttp Dim HTMLDoc As New HTMLDocument Dim elem As Object Dim x As Long Set XMLHttpRequest = New MSXML2.xmlHttp XMLHttpRequest.Open "GET", "https://www.goaloong.net/football/6in1", False XMLHttpRequest.send While XMLHttpRequest.readyState = 200 DoEvents Wend Debug.Print XMLHttpRequest.responseText HTMLDoc.Body.innerHTML = XMLHttpRequest

问题 I'm working on the following dataset and its missing data: # A tibble: 27 x 6 id sex d8 d10 d12 d14 <dbl> <chr> <dbl> <dbl> <dbl> <dbl> 1 1 F 21 20 21.5 23 2 2 F 21 21.5 24 25.5 3 3 NA NA 24 NA 26 4 4 F 23.5 24.5 25 26.5 5 5 F 21.5 23 22.5 23.5 6 6 F 20 21 21 22.5 7 7 F 21.5 22.5 23 25 8 8 F 23 23 23.5 24 9 9 F NA 21 NA 21.5 10 10 F 16.5 19 19 19.5 # ... with 17 more rows I would like to fill the missiningness data via the Last Observation Carried Forward method (LOCF) and the Next

问题 I want to find the whole words in text not a sub string. I have written following code. $str = 'its so old now.'; $a = 'so'; if (stripos($str,$a) !== false) { echo 'true'; } else { echo 'false'; } str1 = 'its so old now.'; str2 = 'it has some issue.'; I want to find word 'so' in text. it give true in both the string. But I want true in first case only because in second string 'so' contains in 'some' words. Thanks in advance 回答1: \b can be used in regex to match word boundaries. \bso\b Should

问题 I am stuck with this error. please help.. XMLHttpRequest cannot load. Request header field x-access-token is not allowed by Access-Control-Allow-Headers. 回答1: Your server should return that it accepts custom headers (like x-access-token). For example, if you are using nodejs with expressjs, try this: app.use(function(req, res, next) { res.header("Access-Control-Allow-Origin", "*"); // keep this if your api accepts cross-origin requests res.header("Access-Control-Allow-Headers", "Origin, X

问题 I have recently had to deal with C++ covariance return types such as the following construct : struct Base { virtual ~Base(); }; struct Derived : public Base {}; struct AbstractFactory { virtual Base *create() = 0; virtual ~AbstractFactory(); }; struct ConcreteFactory : public AbstractFactory { virtual Derived *create() { return new Derived; } }; It allows the client code to treat the Derived object as a Base type or as a Derived type when needed and especially without the use of dynamic_cast