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I've inherited a code block that contains the following regex and I'm trying to understand how it's getting its ... groups: the entire match and the last match? Question&Answers:os...

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

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Free Rest API to retrieve current datetime as string (timezone irrelevant)

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

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C++ standard: dereferencing NULL pointer to get a reference?

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

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What is the eta expansion in Scala?

I am new to Scala. I just heard the term "eta expansion" and roughly know that it means to expand a method to a ... = x * x } Is it all that Scala does? Question&Answers:os...

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

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c# - How to call code behind server method from a client side JavaScript function?

I am having an JavaScript function for a HTML button click event in ASPX page. And a server Method in its code ... name) { // Code for some functionality } Question&Answers:os...

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

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r - Replace NA in column with value in adjacent column

This question is related to a post with a similar title (replace NA in an R vector with adjacent values). I would ... INACTIVE 1999-03-15 2009-02-07 4712-12-31 Question&Answers:os...

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

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php - Is possible to keep session even after the browser is closed?

Could anyone tell how to maintain a session (in PHP) so that the session contains are preserved and are ... accessed the next time the browser is used. Question&Answers:os...

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

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Encoding conversion in java

Is there any free java library which I can use to convert string in one encoding to other encoding, something like iconv? I'm using Java version 1.3. Question&Answers:os...

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

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c++ - OpenCV better detection of red color?

I have the following image: I would like to detect the red rectangle using cv::inRange method and HSV color space ... best values (and maybe filters) to use? Question&Answers:os...

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

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c++ - I don't want my Excel Add-In to return an array (instead I need a UDF to change other cells)

I've created an Excel Add-In, and one of the functions of this Add-In, lets say New_Years currently takes ... if this is possible? Or impossible? Many thanks! Question&Answers:os...

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

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How to perform JSF validation in actionListener or action method?

I have Bean validation working nicely in my application. Now I want to check that a new user does not ... on if they choose an already existing username? Question&Answers:os...

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

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python - How might I remove duplicate lines from a file?

I have a file with one column. How to delete repeated lines in a file? Question&Answers:os...

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

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multithreading - Killing thread after some specified time limit in Java

Is there a way to kill a child thread after some specified time limit in Java? Edit: Also this particular ... not sure that interrupt() will be successful? Question&Answers:os...

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

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android - record/save audio from voice recognition intent

Before asking this question, I checked all stackoverflow other threads related to this issue without any success, so ... ? Thank you for your help Best regards Question&Answers:os...

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

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java - If you overwrite a field in a subclass of a class, the subclass has two fields with the same name(and different type)?

I have 3 classes: public class Alpha { public Number number; } public class Beta extends Alpha { public String number ... assertEquals(42, ((Gama) a).number); } Question&Answers:os...

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

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stream - Edit a specific Line of a Text File in C#

I have two text files, Source.txt and Target.txt. The source will never be modified and contain N lines of text. So ... lines, the rest get lost. What can I do? Question&Answers:os...

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

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javascript - ES6 Object Destructuring Default Parameters

I'm trying to figure out if there's a way to use object destructuring of default parameters without worrying about the object being ... (a + " " + b); })(); Question&Answers:os...

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

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Matrix of unknown length in MATLAB?

I'm trying to set up a zero matrix of variable length with two columns into which I can output the results of a ... begin with, and how to go about doing that. Question&Answers:os...

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

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How do you define custom `Error` types in Rust?

I'm writing a function that could return several one of several different errors. fn foo(...) -> Result<..., ... it? And how do I implement the Error trait? Question&Answers:os...

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

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javascript - Method to show native datepicker in Chrome

I use <input type="date"> fields that gracefully fallback to jQuery when the browser does not have support for ... use in Chrome to trigger the datepicker UI? Question&Answers:os...

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

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java - Why does the ternary operator unexpectedly cast integers?

I have seen it discussed somewhere that the following code results in obj being a Double, but that it prints 200 ... interact in this way. Why does this happen? Question&Answers:os...

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

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python - Getting an instance name inside class __init__()

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

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operators - What does the percentage sign mean in Python

In the tutorial there is an example for finding prime numbers: >>> for n in range(2, 10): ... for x in range ... sign falls in. What does if n % x actually say? Question&Answers:os...

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

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Need to write at beginning of file with PHP

I'm making this program and I'm trying to find out how to write data to the beginning of a file rather than the end. ... end of while ?> </div> </body> </html> Question&Answers:os...

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

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javascript - How to change/remove CSS classes definitions at runtime?

I know it is possible to add new CSS classes definitions at runtime through JavaScript. But... How to change/ ... know how to remove the .menu class definition. Question&Answers:os...

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

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android - How can I convert a part of Java source file to Kotlin?

In my Kotlin project, I have some parts of Java code that I want to convert to Kotlin. The menu item that ... convert. How can I convert Java code to Kotlin? Question&Answers:os...

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

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c# - Have a set of Tasks with only X running at a time

Let's say I have 100 tasks that do something that takes 10 seconds. Now I want to only run 10 at a time ... me started on how to achieve this goal with Tasks? Question&Answers:os...

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

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How to set Json.Net as the default serializer for WCF REST service

Is it possible to override the default WCF DataContractSerializer behaviour when Serialize/DeSerialize entities and use JSON.NET ... ) { } } Many thanks Hossam Question&Answers:os...

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

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