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java - Maximum number of threads in a JVM?

What are the maximum number of threads which can be maintained by the Java virtual machine? I did not explain this ... a better way 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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reflection - Java dynamic function calling

I have a String array that contains names of method in the yyyyyy class In the xxxxxx class I'm making a yyyyyy ... in a loop. Is this possible? See Question&Answers more detail:os...

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

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python - pandas - get most recent value of a particular column indexed by another column (get maximum value of a particular column indexed by another column)

I have the following dataframe: obj_id data_date value 0 4 2011-11-01 59500 1 2 2011-10-01 35200 2 4 2010-07 ... obj_id', 'data_date', 'value')) See Question&Answers more detail:os...

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

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FOR loop performance in PHP

As my research leads me to believe that for loops are the fastest iteration construct in PHP... to make it ... example two. Is that correct? See Question&Answers more detail:os...

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

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r - Rscript: There is no package called ...?

I want to run R files in batch mode using Rscript, however it does not seem to be loading the libraries that I need ... Files/R/R-3.1.0/library" See Question&Answers more detail:os...

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

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Cross-Fade between images with CSS in loop

I want to fade between images in a loop (like result here-jsfiddle.net/5M2PD) but purely through CSS, no ... ; animation-direction: alternate; } See Question&Answers more detail:os...

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

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asp.net mvc - Validation does not work when I use Validator.TryValidateObject

DataAnnotations does not work with buddy class. The following code always validate true. Why ? var isValid = Validator ... no answer. link text See Question&Answers more detail:os...

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

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java - Difference between Synchronized block with wait/notify and without them?

If I just use synchronized, not the wait/notify methods, will it still be thread-safe? What's the difference? See Question&Answers more detail:os...

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

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javascript - How to properly escape characters in regexp

I want to do a string search inside a string. Simply saying MySTR.search(Needle). The problem occurs when this ... a simpler way to do it? See Question&Answers more detail:os...

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

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How to make a function return a pointer to a function? (C++)

I'm trying to make a function that takes a character, then returns a pointer to a function depending on what ... a pointer to a function. See Question&Answers more detail:os...

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

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c# - Overriding GetHashCode for mutable objects?

I've read about 10 different questions on when and how to override GetHashCode but there's still something I ... them with their primary keys. See Question&Answers more detail:os...

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

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node.js - Error: UNABLE_TO_VERIFY_LEAF_SIGNATURE Phonegap Installation

I'm trying to install Phonegap in Ubuntu. The installation of NodeJS was successful, however I can't install ... Any help would be appreciated. See Question&Answers more detail:os...

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

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javascript - How to set ChartJS Y axis title?

I am using Chartjs for showing diagrams and I need to set title of y axis, but there are no information ... there was no information about it See Question&Answers more detail:os...

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

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Proper way to use JQuery when using MasterPages in ASP.NET?

I have no issues when doing using JQuery in a aspx page without a masterpage, but when I try to use it ... everything go using my example above? See Question&Answers more detail:os...

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

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python - How to calculate time difference by group using pandas?

Problem I want to calculate diff by group. And I don't know how to sort the time column so that each ... because there are 50 million rows. See Question&Answers more detail:os...

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

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c# - Manipulating images with .NET Core

I have updated my project from .NET 4.5 to .NET Core (with ASP.NET Core). I had some very simple code in my ... has no code on it what so ever. See Question&Answers more detail:os...

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

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console - Powershell output column width

If I have an executable out.exe and it's stdout is redirected to a file, i.e.: out.exe > $file Right now ... In my case I'm using fxcopcmd.exe. See Question&Answers more detail:os...

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

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Simple Signals - C programming and alarm function

#include <stdio.h> #include <signal.h> void ALARMhandler(int sig) { signal(SIGALRM, SIG_IGN); /* ignore this ... Any idea what is going on? See Question&Answers more detail:os...

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

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android - How to set an imageView's image from a string?

I have a list of entries and some bitmap files in the res/drawable-mdpi directory. I'm trying to load ... going about this differently? Thanks See Question&Answers more detail:os...

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

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java - Using the JPA Criteria API, can you do a fetch join that results in only one join?

Using JPA 2.0. It seems that by default (no explicit fetch), @OneToOne(fetch = FetchType.EAGER) fields ... and use dynamic JPQL TypedQueries. See Question&Answers more detail:os...

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

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javascript - Why does google main page use (0, obj.func)(args) syntax?

Sometimes I stared at js provided with google.com main page and found that they tended to use (0, obj.func)(args) ... })(_); Why prepending 0? See Question&Answers more detail:os...

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

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c# - 'AssemblyTitle' attribute in the .NET Framework

What is the practical use of the AssemblyTitle attribute? MSDN says that it specifies a description for an ... the use of AssemblyTitle. See Question&Answers more detail:os...

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

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c++ - Is sizeof(*ptr) undefined behavior when pointing to invalid memory?

We all know that dereferencing an null pointer or a pointer to unallocated memory invokes undefined behaviour. But ... Is this also undefined? See Question&Answers more detail:os...

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

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c# - Get timestamp from Authenticode Signed files in .NET

We need to verify that binary files are signed properly with digital signature (Authenticode). This can be achieved ... signature in C Sharp? See Question&Answers more detail:os...

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

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javascript - Node: Downloading a zip through Request, Zip being corrupted

I'm using the excellent Request library for downloading files in Node for a small command line tool I'm working on ... where to go from here. See Question&Answers more detail:os...

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

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Partially skip sections with Google Closure Compiler

I'm generating a javascript on the server like and would like to run Google Clousure Compiler to be ran on the ... *??>/ Best regards, Niclas See Question&Answers more detail:os...

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

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218 views

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How to place arrow head triangles on SVG lines?

I am new to SVG and I am trying to draw a straight line between two points. I managed so far by using this ... </script> </body> </html> See Question&Answers more detail:os...

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

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354 views

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ios - Difference between _ and self. in Objective-C

Is there a difference between using the underscore and using the self keyword in Objective-C when calling an @property ... _myString = @"test"; See Question&Answers more detail:os...

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

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