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I have made a plot using ggplot2 geom_histogram from a data frame. See sample below and link to the ggplot ... 2012 270.475 NTH Poritidae 2013 363.4635 Question&Answers:os...

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

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c++ - How to Detect the Number of Physical Processors / Cores on Windows, Mac and Linux

I have a multi threaded c++ application that runs on Windows, Mac and a few Linux flavors. To make a long ... is supported and enabled? If so, how exactly. Question&Answers:os...

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

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How to make CSS visible only for Opera

Is there a way to make some CSS rules visible only for Opera (9.5 +)? Question&Answers:os...

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

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Gcc error: gcc: error trying to exec 'cc1': execvp: No such file or directory

I have been successfully using gcc on Linux Mint 12. Now I am getting an error. I have recently been doing some ... 'cc1': execvp: No such file or directory Question&Answers:os...

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

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urlencode - In a URL, should spaces be encoded using %20 or +?

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

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How does Java's System.exit() work with try/catch/finally blocks?

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

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Handling key-press events (F1-F12) using JavaScript and jQuery, cross-browser

I want to handle F1-F12 keys using JavaScript and jQuery. I am not sure what pitfalls there are to ... jQuery library or maybe just vanilla jQuery/JavaScript? Question&Answers:os...

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

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html - jquery - Click event not working for dynamically created button

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

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unicode - Remove zero-width space characters from a JavaScript string

I take user-input (JS code) and execute (process) them in realtime to show some output. Sometimes the ... take the zero-width space characters into account? Question&Answers:os...

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

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ios - How should I use NSSetUncaughtExceptionHandler in Swift

At Objective-C, I call the NSSetUncaughtExceptionHandler(&exceptionHandler) method to log exceptions. How does it called in Swift? Question&Answers:os...

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

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Javascript roundoff number to nearest 0.5

Can someone give me an idea how can i round off a number to the nearest 0.5. I have to scale elements in ... place or none. How can i accomplish this job? Question&Answers:os...

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

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c# - How to retrieve Data Annotations from code? (programmatically)

I'm using System.ComponentModel.DataAnnotations to provide validation for my Entity Framework 4.1 project. For example: ... MaxLength); How can I do that? Question&Answers:os...

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

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Bootstrap 5 navbar align items right

How do you align Bootstrap 5 navbar items to the right? In Bootstrap 3 it's navbar-right. In Bootstrap 4 it's ml-auto. But not work for Bootstrap 5. Question&Answers:os...

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

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C++: Redirecting STDOUT

In my application, I want to redirect the output that would normally go to the stdout stream to a function I ... How can I achieve this / similar behaviour? Question&Answers:os...

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

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python - Proxy awareness with pip

I have tried to set up a python development environment at my work place to create some basic applications. I can' ... this means exactly or how to resolve it. Question&Answers:os...

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

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How to insert an item at the beginning of an array in PHP?

I know how to insert it to the end by: $arr[] = $item; But how to insert it to the beginning? Question&Answers:os...

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

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304 views

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javascript - How to get the onclick calling object?

I need to have a handler on the calling object of onclick event. <a href="123.com" onclick="click123( ... live of jQuery but with the method described above. Question&Answers:os...

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

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Is there a decent wait function in C++?

One of the first things I learned in C++ was that #include <iostream> int main() { std::cout<<"Hello, World ... . Is there a better wait function I can use? Question&Answers:os...

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

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recursion - Are functions in JavaScript tail-call optimized?

I have been trying to understand Tail call optimization in context of JavaScript and have written the below recursive and ... someone help me out on this one? Question&Answers:os...

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

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c# - Where does error CS0433 "Type 'X' already exists in both A.dll and B.dll " come from?

When I run a webapp from Visual Studio 2008 SP1 using the internal web server (not IIS) I receive the above ... post and some others, they don't apply. Question&Answers:os...

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

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access rights - Add "Everyone" privilege to folder using C#.NET

I have used the code below to allow Everyone access to a folder: System.Security.AccessControl.DirectorySecurity ... execute etc. checkboxes are not checked. Question&Answers:os...

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

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261 views

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html - Force "Internet Explorer 8" browser mode in intranet

There are "Internet Explorer 8", "Internet Explorer 8 Compatibility Mode", and IE7 mode in IE8. However, the default ... I am not talking "document mode" here. Question&Answers:os...

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

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html - Why is HTML5 input type datetime removed from browsers already supporting it?

I was wondering why all browsers, like Chrome versions higher than 26, which had support in the past for the input ... call him back? tomorrow 3pm UTC or CET? Question&Answers:os...

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

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413 views

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node.js - 'node' is not recognized as an internal or an external command, operable program or batch file while using phonegap/cordova

I am using phonegap/cordova. Everthing is installed propelry i.e cordova, phonegap, ant,sdk,jdk. But now it ... not recogzed as an internal or external command" Question&Answers:os...

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

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770 views

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python - Accuracy Score ValueError: Can't Handle mix of binary and continuous target

I'm using linear_model.LinearRegression from scikit-learn as a predictive model. It works and it's perfect. I ... 't handle mix of binary and continuous target Question&Answers:os...

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

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102 views

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c# - How to set the timeout for a TcpClient?

I have a TcpClient which I use to send data to a listener on a remote computer. The remote computer will sometimes ... ? How would I change the time out time? Question&Answers:os...

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

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151 views

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How to get timestamp of tick precision in .NET / C#?

Up until now I used DateTime.Now for getting timestamps, but I noticed that if you print DateTime.Now in a loop you ... the offset which can be up to 20 ms. Question&Answers:os...

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

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python - Why is using thread locals in Django bad?

I am using thread locals to store the current user and request objects. This way I can have easy ... splitting purists who love to pass objects explicitly. Question&Answers:os...

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

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