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javascript - Possible Unhandled Promise Rejection (id: 0): undefined is not an object ('prevComponentInstance._currentElement')

In react native I am trying to get json data using axios.get(my_url_path), then I'm update my state with response ... what I done wrong if any? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Python List Comprehension for Addition

I'm new to Python and cannot convert a function to a list comprehension. The comprehension involves the value function, ... for y in self.cards] See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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angular - Wrong type of object after subscribe in RxJS

I have an Angular 4 app. I have a service that fetch data from Firebase database by API URL: import { ... , because of this error message. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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virtual machine - Unknown Exception with Code: 13

I have created a new project, then went to VM Instances. It says "enabling compute engine". After some ... up permissions or anything else? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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node.js - Android : Cloud function for Chat

I face a difficulty to create the Cloud Function for chatting feature. My firebase design look like the follows ... from the above design. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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consequences of multiple weak symbols(C Linker)

I just have a question about potential problem of multiple weak symbols, this question is from my textbook: One ... or my instructor is correct? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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php - Database design for answer table in quiz app

I am designing a quiz app and i am stuck on how to design the answers table. Assume i have the following tables: ... set (11 min 30.33 sec) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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function - C++ convert binary to decimal, octal

Please i need help debugging the code below. I am suppose to produce a code using functions that converts binary numbers ... <<octnum[j]; } } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Python Basics: for i, element in enumerate(seq)..why/how does this work?

Hello I've found an intersting snippet: seq = ["one", "two", "three"] #edited for i, element in enumerate(seq ... python do here? Thanks a lot! See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - Incorrect syntax near the keyword 'Order' - Order is table name

List<Order> results = new List<Order>(); db.Cmd = db.Conn.CreateCommand(); db.Cmd.CommandText = "SELECT ... of other settings in the database. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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abap - ADBC and AMDP in Production systems

Is it advisable to use ADBC or AMDP in Production? If not, why? Thank you for your comments in advance! See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Horizontal RecyclerView with nice animation Android

How to make such like horizontal recycle view with nice UI animation. Note: I can make horizontal recyclerview. ... start from center any help. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - HTML page calls JSP file

I have a HTML page on my computer and a JSP file on a distant server. Now how do I, Display content from ... itself? How would I implement it? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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vb.net - ActiveX component can't create object when using .net class in vba

I am trying to use a custom class exported as a .tlb in vba. I have done the regasm stuff but I keep ... MsgBox("hello") End Sub End Class See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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how to calculate exact hours from two timestamp in php?

I need to get the difference of hours from between two timestamps. Can you tell me how can it be done using php? Thanks in advance. Regards, See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How do I approach solving this problem: Cannot access 'calculationEntry' before initialization?

I'm developing a large CRA single page app. It has been running fine for months, with the normal bugs ... down this TDZ exceptions problem. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - JSoup - How to parse nested texts?

I'm parsing html of a website with JSoup. I want to parse this part: <td class="lastpost"> This is a text 1 ... can I get the parts like this? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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ios - UIPageViewController setViewController causing app to crash

I have a - (void)setViewControllers:(NSArray *)viewControllers direction:(UIPageViewControllerNavigationDirection)direction animated ... } @end See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Display texts at different-different coordinates using three.js

I want to display different texts at different-different coordinates using three js. And I want to show the text ... } Here is link of fiddle See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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jquery - jquery__WEBPACK_IMPORTED_MODULE_4__.hubConnection is not a function

I am trying to get singlar (non ASP.Core one) to work with angular 8 If I just add the ... .hubConnection is not a function See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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linux - Executable file does not exist after compiling Fortran code

I am compiling using cmake. I am on Linux with an intel processor. The important cmake lines are set(SRCS ... I linking the files incorrectly? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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html - `innerHTML` not working with `input` tag but `value `does

I am learning the MEAN stack. I'm performing CRUD operations. I'm stuck with update. Not with the operation ... me what wrong with this code. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - How can we call one fragment from another class that doesn't contain that fragment?

I am having one activity class : IdeaBoxActivity Here is the layout code of the activity- <?xml version="1.0 ... with the code that should work. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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android - Having issues writing to EditText in Kotlin

So I think I'm having some scoping issues. I'm trying to use the function setZipEdit to set ... </android.support.constraint.ConstraintLayout> See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - Tkinter / TTK - Prevent string to ButtonPress conversion

I'm writing a simple script that creates a ttk Treeview (that acts as a table) and, when you double-click it, it ... "]: os.startfile(str(f))) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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python - svg tag scraping from funnels

I am trying to scrape data from here but getting error. I have taken code from here Scraping using ... (message, screen, stacktrace) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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sorting - Using comparator for several characteristics in java

I have a list to be sorted but it cannot be done if values are represented as strings. Example: to sort: ... sort them according to their names. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Convert Arrow function to function expression

I have a function with a map object: function xml_encode(s) { return Array.from(s).map(c => { var cp ... this function to work with IE11? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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