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gnuplot store one number from data file into variable

OSX v10.6.8 and Gnuplot v4.4 I have a data file with 8 columns. I would like to take the first ... found where a numeric expression was expected See Question&Answers more detail:os...

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c++ - The implementation of random_device in VS2010?

From my reading of the standard, random_device::entropy() should return 0.0 if a software engine is used ... generate the number sequence? See Question&Answers more detail:os...

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php - Inserting UTF-8 encoded string into UTF-8 encoded mysql table fails with "Incorrect string value"

Inserting UTF-8 encoded string into UTF-8 encoded table gives incorrect string value. PDOException: SQLSTATE[HY000 ... "Incorrect string value". See Question&Answers more detail:os...

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c# - How do I pass credentials to a machine so I can use Microsoft.Win32.RegistryKey.OpenRemoteBaseKey() on it?

This .NET API works OK if I'm trying to open the Registry in a machine that's in the same domain as I ... credentials some other way, but how? See Question&Answers more detail:os...

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javascript - Convert SVG Path to Absolute Commands

Given an SVG Path element, how can I convert all path commands into absolute coordinates? For example, convert ... motivated by this question. See Question&Answers more detail:os...

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background - IOS Getting location updates when app terminated without using significantChange

I apologise for the redundancy of this topic, but in spite all the given answers, I can't identify the ... please ? Thank you infinitely, See Question&Answers more detail:os...

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linux - How to tell mex to link with the libstdc++.so.6 in /usr/lib instead of the one in the MATLAB directory?

Now mex in MATLAB 2012a only officially supports gcc 4.4.6 but I want to use gcc 4.7 at my own risk. Now If ... .so.6 that mex uses? Thank you. See Question&Answers more detail:os...

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.net - Algorithm to avoid SQL injection on MSSQL Server from C# code?

What would be the best way to avoid SQL injection on the C#.net platform. Please post an C# implementation if you have any. See Question&Answers more detail:os...

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security - Can I serve MP3 files with PHP?

In the same way that it's possible to serve up images with php, for use in CAPTACHAS and such, is it possible to ... why I'd want to do this. See Question&Answers more detail:os...

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python - How can I access directory-local variables in my major mode hooks?

I have defined a .dir-locals.el file with the following content: ((python-mode . ((cr/virtualenv-name ... respond to directory-local variables? See Question&Answers more detail:os...

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jquery - Cordova 3.4 iOS white screen after splash

I have been looking around at a few different posts on here concerning this issue and nothing has solved my problem. ... the heck is going on? See Question&Answers more detail:os...

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generic way to print out variable name in c++

given a class struct { int a1; bool a2; ... char* a500; ... char a10000; } I want to print or ... any generic way? Thanks for any comments! See Question&Answers more detail:os...

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scala - How to explode an array into multiple columns in Spark

I have a spark dataframe looks like: id DataArray a array(3,2,1) b array(4,2,1) c array(8,6,1) d array(8 ... d 8 2 4 What function should I use? See Question&Answers more detail:os...

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Java SHA256 outputs different hash to PHP SHA256?

PHP code: echo hash('sha256', 'jake'); PHP output: cdf30c6b345276278bedc7bcedd9d5582f5b8e0c1dd858f46ef4ea231f92731d Java code: ... now anyway. See Question&Answers more detail:os...

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c++ - Does std::cout have a return value?

I am curious if std::cout has a return value, because when I do this: cout << cout << ""; some hexa ... 's the meaning of this printed value? See Question&Answers more detail:os...

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c# - Graphic - DrawLine - draw line and move it

In my .net c# program i draw few lines using values from text boxes (i use DrawLine function). I want to be ... with mouse - is it possible? See Question&Answers more detail:os...

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r - How to repeat the Grubbs test and flag the outliers

I am wanting to apply the Grubbs test to a set of data repeatedly until it ceases to find outliers. I want the ... No 63.05 No 57.53 No See Question&Answers more detail:os...

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visual studio 2010 - Why does MSBuild ignore my BeforePublish target?

I must be missing something obvious here, but I have this at the end of my ASP.NET MVC web project's .csproj ... a hitch. What am I missing? See Question&Answers more detail:os...

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How to download a file and store it in Downloads folder using Flutter

I'm building an App using Flutter 1.10.3 and I'm having difficulties downloading images to the Downloads ... using any 3rd-part libraries? See Question&Answers more detail:os...

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ios7 - How can I get a transparent background in my iOS app so I can see the Home Screen wallpaper?

I'm fairly sure this is going to be straight forward in that it's probably not possible. Basically, I'd like to ... of these seem to do it. See Question&Answers more detail:os...

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c# - Convert Kinect ColorImageFrame to Bitmap

I′m using Kinect (Microsoft SDK) with XNA. I want to use GRATF for marker-recognition How to convert the data of ... .FindGlyphs(bitmap); ... } See Question&Answers more detail:os...

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Change Android 5.0 Actionbar color

I'm working with the new Lollipop Material Design guidelines and would like to incorporate that nifty navigation drawer ... </item> </style> See Question&Answers more detail:os...

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html - how to set content-disposition = attachment via javascript?

How can I set content-disposition = attachment via javascript? Basically, I would like to force a "SaveAs" operation ... How can I do this ? See Question&Answers more detail:os...

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multithreading - Java Executors: how can I stop submitted tasks?

I have submitted a task using executors and I need it to stop after some time (e.g. 5 minutes). I have ... are still working after 5 minutes? See Question&Answers more detail:os...

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javascript - Empty for loop - for(;;)

I was exploring the Google Closure Compiler, and one thing I noticed was that it converts while(true) into for ... give an explanation for this? See Question&Answers more detail:os...

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How do I open any app from my web browser (Chrome) in Android? What do I have to do with the A Href link?

I want to open third party apps from my web browser. So, I don't have any manifest file or anything. I have ... to go open that app? Thank you. See Question&Answers more detail:os...

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c - In clang, how do you use per-function optimization attributes?

I'm trying to compile a specific function with no optimization using clang, in order to prevent certain ... nothing changed the behavior.) See Question&Answers more detail:os...

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r - Combining S4 and S3 methods in a single function

What is a good way of defining a general purpose function which should have implementations for both S3 and S4 ... better ways to do this? See Question&Answers more detail:os...

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

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