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java - why MenuItemCompat.getActionProvider returns null?

I tried to use android.support.v7.widget.ShareActionProvider on actionbar in my app. So I followed the example from ... could I deal with it? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Removing minimize/maximize buttons in Tkinter

I have a python program which opens a new windows to display some 'about' information. This window has its ... mailto:[email protected]',new=1) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How do you use a TimerTask to run a thread?

I'm struggling to find documentation for the TimerTask function on Android. I need to run a thread at ... would be greatly appreciated. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Should I use prepared statements for MySQL in PHP PERFORMANCE-WISE?

I understand the security benefits of prepared statements in MySQL. No need to cover that topic here. I'm wondering ... really is "it depends." See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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Make a Swift dictionary where the key is "Type"?

I'm trying to do this sort of thing .. static var recycle: [Type: [CellThing]] = [] but - I can't :) ... have k of those already! return c } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Force requests to use IPv4 / IPv6

How to force the requests library to use a specific internet protocol version for a get request? Or can this be ... myUserName', 'my-password')) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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JavaScript event registering without using jQuery

How to correctly do something like the following without using jQuery. $(document).ready(function(){ $("#someButton").click ... }); }); Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - How to prevent Multiple Toast Overlaps

I've been using a common "myToast" which I use "myToast.cancel() prior to issuing a new toast. For Android v2.3 ... with Android 2.2, 2.3. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - Area of rectangle-rectangle intersection

Below are 2 rectangles. Given the coordinates of the rectangle vertices - (x1, y1)...(x8, y8), how ... then calculate area of smaller rectangle. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How do you register a Win32 COM DLL file in WiX 3?

I found an example on registering DLLs, Registering an Assembly for COM Interop in a MSI file with the Windows ... what should I put there? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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asp.net - Entity Framework: how to solve "FOREIGN KEY constraint may cause cycles or multiple cascade paths"?

there are lots of questions about this problem, but I couldn't solve my case. can some one please take ... between Roles and Applications too. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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PHP function to delete all between certain character(s) in string

I'm interested in function delete_all_between($char1, $char2, $string) that will search given $string for $char1 ... have quick solution? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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mongodb - Mongo how to $lookup with DBRef

I have a trouble(/(ㄒoㄒ)/~~). Suppose that collection A is { "_id" : ObjectId("582abcd85d2dfa67f44127e1"), " ... work. Anybody can help? Thanks. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - How to escape a string for use in Boost Regex

I'm just getting my head around regular expressions, and I'm using the Boost Regex library. I have a need to ... that would need to be escaped? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Send email via gmail

I have a code the fires intent for sending email Intent i = new Intent(Intent.ACTION_SEND); i.setType("text/ ... (or maybe just email apps)? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to use timezone offset in Nodejs?

I need the next flow: var a = new Date(1337324400000, 'Europe/Amsterdam'); //+2h console.log(a); // ... such possibility in nodejs utils api ? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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rust - What is a crate attribute and where do I add it?

In order to get a feel for how Rust works, I decided to look at a little terminal-based text editor called ... if_let)] to the crate attributes? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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201 views

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html - With a browser, how do I know which decimal separator does the operating system use?

I'm developing a web application. I need to display some decimal data correctly so that it can be copied and ... of other (incorrect) answers. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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python - Pandas Groupby and Sum Only One Column

So I have a dataframe, df1, that looks like the following: A B C 1 foo 12 California 2 foo 22 California 3 ... column C when I group and sum? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c - Do temp variables slow down my program?

Suppose I have the following C code: int i = 5; int j = 10; int result = i + j; If I'm looping ... -wise in C? What about other languages? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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android - Firebase onTokenRefresh() is not called

In my MainActivityin my log, I can see the token using FirebaseInstanceId.getInstance().getToken() and it ... (refreshedToken); } } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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How do I order my SQLITE database in descending order, for an android app?

What is the most efficient method of showing my data in descending order? public String getRank() { String[ ... ; //returning result } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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java - "No match Found" when using matcher's group method

I'm using Pattern/Matcher to get the response code in an HTTP response. groupCount returns 1, but I get an ... .lang.Thread.run(Unknown Source) See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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c++ - What makes a static variable initialize only once?

I noticed that if you initialize a static variable in C++ in code, the initialization only runs the first time you run the ... ) ; go( 5 ) ; } See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Leaflet map not displayed properly inside tabbed panel

I'm trying to use Leaflet.js to display a map inside a tabbed panel from Twitter Bootstrap, but is behaving ... Any help is really appreciated! See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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angular - How to use/import http module?

I've been playing with Angular 2 Quickstart. How can I use/import http module in Angular 2? I've looked ... heard Angular 2 is somewhat modular. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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558 views

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Javascript ArrayBuffer to Hex

I've got a Javascript ArrayBuffer that I would like to be converted into a hex string. Anyone knows of a ... of the array buffer instead. See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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divide by zero - Is 1/0 a legal Java expression?

The following compiles fine in my Eclipse: final int j = 1/0; // compiles fine!!! // throws ... What good could this possibly serve? See Question&Answers more detail:os...

asked Oct 17, 2021 in Technique[技术] by 深蓝 (71.8m points)

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