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objective c - Periodic iOS background location updates

I'm writing an application that requires background location updates with high accuracy and low frequency. The ... Manager in iOS 7 from background task Question&Answers:os...

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

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validation - Validating email addresses using jQuery and regex

I'm not too sure how to do this. I need to validate email addresses using regex with something like this: ... does the validation go and what is the expression? Question&Answers:os...

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

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185 views

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Intercepting links from the browser to open my Android app

I'd like to be able to prompt my app to open a link when user clicks on an URL of a given pattern instead of ... app. How do I achieve this for my own app? Question&Answers:os...

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

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java - NoSuchMethodError in javax.persistence.Table.indexes()[Ljavax/persistence/Index

I have a Play Framework application and I was using Hibernate 4.2.5.Final (which is retrieved via the Maven dependency manager ... -4.3.0.Final.jar:4.3.0.Final] Question&Answers:os...

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

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Why does a Java method reference with return type match the Consumer interface?

I am confused by the following code class LambdaTest { public static void main(String[] args) { Consumer< ... somebody explain to me what is happening here? Question&Answers:os...

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

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php - difference between two arrays

I have following two arrays. I want the difference between these two arrays. That is, how can I find the values that do not ... 108 [21] => 110 [22] => 112); Question&Answers:os...

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

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python - How to capture multiple camera streams with OpenCV?

I have to stitch the images captured from many (9) cameras. Initially, I tried to capture the frames from ... right way to capture frames from multiple cameras? Question&Answers:os...

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

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276 views

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html - How to center elements on the last row in CSS Grid?

I am using CSS grid to layout some items like this... #container { display: grid; grid-template-columns: 16.666% 16. ... <div class="item">Item</div> </div> Question&Answers:os...

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

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Running Angular and AngularJS frameworks side by side

I have found resources that describe how to integrate Angular (2) components into AngularJS, but all of these ... adding a transpiler to the AngularJS app? Question&Answers:os...

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

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symbolic references - How can I use a variable as a variable name in Perl?

I need to achieve the following in perl printmsg(@val1, $msg1) if @val1; printmsg(@val2, $msg2) if @val2; printmsg ... doesn't work and breaks out with errors. Question&Answers:os...

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

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985 views

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networking - What is the difference between a port and a socket?

This was a question raised by one of the software engineers in my organisation. I'm interested in the broadest definition. Question&Answers:os...

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

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What is the difference between `git merge` and `git merge --no-ff`?

Using gitk log, I could not spot a difference between the two. How can I observe the difference (with a git command or some tool)? Question&Answers:os...

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

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765 views

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c++ - How to detect reliably Mac OS X, iOS, Linux, Windows in C preprocessor?

This question already has answers here: Question&Answers:os...

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

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time - Should MySQL have its timezone set to UTC?

Follow up question of https://serverfault.com/questions/191331/should-servers-have-their-timezone-set-to-gmt-utc Should ... UTC) What are the pros and cons? Question&Answers:os...

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

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852 views

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cocoa - Best way to define private methods for a class in Objective-C

I just started programming Objective-C and, having a background in Java, wonder how people writing Objective-C programs ... I do not know if that's possible. Question&Answers:os...

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

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390 views

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css - How to remove Firefox's dotted outline on BUTTONS as well as links?

I can make Firefox not display the ugly dotted focus outlines on links with this: a:focus { outline: none; ... to the design instead of ugly grey dots) Question&Answers:os...

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

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365 views

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javascript - Show or hide element in React

I am messing around with React.js for the first time and cannot find a way to show or hide something on ... React.renderComponent(<Search /> , document.body); Question&Answers:os...

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

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1.2k views

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logging - How to log PostgreSQL queries?

How to enable logging of all SQL executed by PostgreSQL 8.3? Edited (more info) I changed these lines : ... I'm using Windows Server 2003. Any ideas? Question&Answers:os...

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

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730 views

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parallel processing - Optimal number of threads per core

Let's say I have a 4-core CPU, and I want to run some process in the minimum amount of time. The process ... I run it using 4000 threads rather than 4 threads? Question&Answers:os...

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

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767 views

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image processing to improve tesseract OCR accuracy

I've been using tesseract to convert documents into text. The quality of the documents ranges wildly, and I'm ... someone who is a novice at image processing? Question&Answers:os...

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

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247 views

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performance - Recursion or Iteration?

Is there a performance hit if we use a loop instead of recursion or vice versa in algorithms where both can serve ... play a vital role in deciding what to use? Question&Answers:os...

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

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294 views

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python - pandas: filter rows of DataFrame with operator chaining

Most operations in pandas can be accomplished with operator chaining (groupby, aggregate, apply, etc), but the only way I' ... (lambda x: x['column'] == value) Question&Answers:os...

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

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152 views

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php - What are the disadvantages of using persistent connection in PDO

In PDO, a connection can be made persistent using the PDO::ATTR_PERSISTENT attribute. According to the ... in performance degradation or something like that. Question&Answers:os...

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

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498 views

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httprequest - How to send a PUT/DELETE request in jQuery?

GET:$.get(..) POST:$.post().. What about PUT/DELETE? Question&Answers:os...

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

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173 views

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node.js - How to set environment variables from within package.json?

How to set some environment variables from within package.json to be used with npm start like commands? Here's ... the app with just one command, npm start. Question&Answers:os...

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

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279 views

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c - Stack smashing detected

I am executing my a.out file. After execution the program runs for some time then exits with the message: **** ... reasons for this and how do I rectify it? Question&Answers:os...

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

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150 views

1 answer

.net - Is it possible to change the location of packages for NuGet?

I have the following convention for most of my projects: /src /Solution.sln /SolutionFolder /Project1 /Project2 ... directory that all packages are loaded into? Question&Answers:os...

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

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231 views

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python - Reading a huge .csv file

I'm currently trying to read data from .csv files in Python 2.7 with up to 1 million rows, and 200 columns ... 3.40 GHz (not certain what information you need). Question&Answers:os...

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

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