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java - Drawing a rectangle that won't disappear in next paint

I trying to create a JPanel that draws rectangles. The Panel needs to draw alot of rectangles, but they dont move. One ... g.fillRect(x, y, size, size); } } Question&Answers:os...

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

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What is the maximum length of an array in .NET on 64-bit Windows

I heard from someone that the maximum array size in .NET is 4 GB? Just wondering if that is true. You wouldn't ... just maybe you might want to do this. :-) Question&Answers:os...

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

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java - How to use XPath on xml docs having default namespace

I want to manipulate xml doc having default namespace but no prefix. Is there a way to use xpath without namespace uri ... book title="t2"/> </author> </root> Question&Answers:os...

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

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python - Message: Element <option> could not be scrolled into view while trying to click on an option within a dropdown menu through Selenium

I am trying to select a drop down menu and choose an option. I am using the latest version of ... statements are there for testing/code tracing purposed. Question&Answers:os...

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

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karate - Error using DBUtils in first scenario

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

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java - How to split a string, but also keep the delimiters?

I have a multiline string which is delimited by a set of different delimiters: (Text1)(DelimiterA)(Text2)( ... a delimiter regex but also keep the delimiters? Question&Answers:os...

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

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c++ - What is the difference between these (bCondition == NULL) and (NULL==bCondition)?

While exploring msdn sites ,most of the condition checking places they are using (NULL == bCondition). what is ... some sample to explain these please. Thanks. Question&Answers:os...

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

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How do I clone a specific Git branch?

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

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assembly - How to run a program without an operating system?

How do you run a program all by itself without an operating system running? Can you create assembly programs that the ... runs the program that is on the CPU? Question&Answers:os...

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

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html5 video - What is a blob URL and why it is used?

I am having a lot of problems with blob URL. I was searching for src of a video tag on YouTube and I ... URL on a server? If you have any additional details Question&Answers:os...

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

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html - Making a div vertically scrollable using CSS

This <div id="" style="overflow:scroll; height:400px;"> Question&Answers:os...

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

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cluster analysis - How do I determine k when using k-means clustering?

I've been studying about k-means clustering, and one thing that's not clear is how you choose the value of k. Is ... of trial and error, or is there more to it? Question&Answers:os...

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

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android - dynamically add and remove view to viewpager

(I figured out a solution - please see my post in the Answer section below.) In my app, the user will ... and finishUdate when I add or remove views? Thanks. Question&Answers:os...

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

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python - multiprocessing: Understanding logic behind `chunksize`

What factors determine an optimal chunksize argument to methods like multiprocessing.Pool.map()? The .map() ... : why are large chunksizes slower?. Question&Answers:os...

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

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javascript - window.onbeforeunload ajax request in Chrome

I have a web page that handles remote control of a machine through Ajax. When user navigate away from the page ... m doing looks completely legit to me. Thanks, Question&Answers:os...

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

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129 views

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How to stop ASP.NET from changing IDs in order to use jQuery

I have this label control in my web page <asp:Label ID="Label1" runat="server" Text="test"></asp:Label> ... jQuery operation like this $('#label1').html(xml); Question&Answers:os...

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

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340 views

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http - Read response headers from API response - Angular 5 + TypeScript

I'm triggering a HTTP request and I'm getting a valid response from it. The response also has a header X- ... in Chrome inspect, shows the header is present. Question&Answers:os...

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

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116 views

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c# - Pivot data using LINQ

I have a collection of items that contain an Enum (TypeCode) and a User object, and I need to flatten it out ... Can this be done in Linq in a cleaner fashion? Question&Answers:os...

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

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153 views

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javascript - How does += (plus equal) work?

I'm a bit confused with the += sign. How does it work? 1 += 2 // equals ? and this var data = [1,2,3,4, ... .forEach(function(value) { sum += value; }); sum = ? Question&Answers:os...

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

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Determine Pixel Length of String in Javascript/jQuery?

Is there any way to determine the pixel length of a string in jQuery/JavaScript? Question&Answers:os...

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

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swift - Sending json array via Alamofire

I wonder if it's possible to directly send an array (not wrapped in a dictionary) in a POST request ... [ "06786984572365", "06644857247565", "06649998782227" ] Question&Answers:os...

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

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606 views

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bytearray - String to byte array in php

How can I get the byte array from some string which can contain numbers, letters and so on? If you are familiar with ... fputs() to a server written in Java... Question&Answers:os...

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

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230 views

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PHP & MySQL: mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given

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

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287 views

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sql - dplyr left_join by less than, greater than condition

This question is somewhat related to issues Efficiently merging two data frames on a non-trivial criteria and Checking ... , but my syntax is missing something? Question&Answers:os...

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

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235 views

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php - Preserving session variables across different domains

I'm not sure if this is even possible. My company has their main site that accept credit cards and ... page looks for the address session variables above. Question&Answers:os...

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

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184 views

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php - How to send UTF-8 email?

When I send out the email, the email does not show characters other than english. It does show like below: ???? ? ... the same. I used Mail::Factory("mail"); Question&Answers:os...

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

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73 views

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Is java.time failing to parse fraction-of-second?

With the first release of Java 8 (b132) on Mac OS X (Mavericks), this code using the new java. ... localDateTime = LocalDateTime.parse( input, formatter ); Question&Answers:os...

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

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542 views

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ios - How to detect AVplayer and get url of current video from WKWebView?

I'm using below code to extract url from UIWebView: it is working fine but, this same code using for WKWebView it' ... , please help me how to get this. Thanks. Question&Answers:os...

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

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