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performance - Why is this SSE code 6 times slower without VZEROUPPER on Skylake?

I've been trying to figure out a performance problem in an application and have finally narrowed it down to ... the problem to a single instruction either. Question&Answers:os...

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

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listview - Android column '_id' does not exist?

I'm having trouble with something that works in the Notepad example. Here's the code from the NotepadCodeLab/ ... a new application to use a SQLite database? Question&Answers:os...

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

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240 views

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JavaFX 11 : Create a jar file with Gradle

I am trying to upgrade a JavaFX project from the 8 Java version to the 11 version. It works when I use the "run" ... ] } } Do you know what I should do ? Question&Answers:os...

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

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366 views

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html - Provide an image for WhatsApp link sharing

How can we include an image in our website to display in WhatsApp when we share a link like this? Question&Answers:os...

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

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bash - How can I split a large text file into smaller files with an equal number of lines?

I've got a large (by number of lines) plain text file that I'd like to split into smaller files, ... to manually looping and counting / partitioning lines). Question&Answers:os...

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

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r - Elegant way to check for missing packages and install them?

I seem to be sharing a lot of code with coauthors these days. Many of them are novice/intermediate R users and ... the ones I am loading and install if missing? Question&Answers:os...

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

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android - Why does LayoutInflater ignore the layout_width and layout_height layout parameters I've specified?

I've had severe trouble getting LayoutInflater to work as expected, and so did other people: How to use ... values from my resources XML not honored? Question&Answers:os...

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

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How do I connect to this localhost from another computer on the same network?

I'm currently working on a project and I would like to test it out on two laptops at home where one laptop connects to ... . I am using XAMPP. How do I do this? Question&Answers:os...

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

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C# code to validate email address

What is the most elegant code to validate that a string is a valid email address? Question&Answers:os...

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

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node.js - Local dependency in package.json

I want to do something like this, so npm install also installs the package.json of ../somelocallib or more importantly its ... "*", "../somelocallib": "*" } Question&Answers:os...

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

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Java client certificates over HTTPS/SSL

I am using Java 6 and am trying to create an HttpsURLConnection against a remote server, using a client ... that the client certificate is the problem here. Question&Answers:os...

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

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generics - What is SuppressWarnings ("unchecked") in Java?

Sometime when looking through code, I see many methods specify an annotation: @SuppressWarnings("unchecked") What does this mean? Question&Answers:os...

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

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css - How do I position one image on top of another in HTML?

I'm a beginner at rails programming, attempting to show many images on a page. Some images are to lay on top of ... the six images on top of the other one. Question&Answers:os...

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

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python - StringIO in Python3

I am using Python 3.2.1 and I can't import the StringIO module. I use io.StringIO and it works, ... StringIO it says ImportError: No module named 'StringIO' Question&Answers:os...

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

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syntax - Effects of the extern keyword on C functions

In C, I did not notice any effect of the extern keyword used before function declaration. At first, I thought ... I'm only asking about extern in functions. Question&Answers:os...

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

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javascript - How can I check if a scrollbar is visible?

Is it possible to check the overflow:auto of a div? For example: HTML <div id="my_div" style="width: ... (no scrollbar) and sometimes long (scrollbar visible). Question&Answers:os...

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

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206 views

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java - JAXB: how to marshall map into <key>value</key>

The question is about JAXB Map marshalling - there is plenty of examples on how to marhsall a Map into a ... create way too many of these helper containers. Question&Answers:os...

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

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433 views

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r - How do I arrange a variable list of plots using grid.arrange?

library(ggplot2) df <- data.frame(x=1:10, y=rnorm(10)) p1 <- ggplot(df, aes(x,y)) + geom_point() plist ... [[5]]) but I need a more general solution. thoughts? Question&Answers:os...

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

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184 views

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java - Problems converting byte array to string and back to byte array

There are a lot of questions with this topic, the same solution, but this doesn't work for me. ... decryptedText); assertEquals(toEncrypt, decryptedText); } } Question&Answers:os...

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

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266 views

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PHP Sort Array By SubArray Value

I have the following array structure: Array ( [0] => Array ( [configuration_id] => 10 [id] => 1 [optionNumber] => ... [lastUpdated] => 2010-03-17 15:44:12 ) ) Question&Answers:os...

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

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169 views

1 answer

c# - Checking for directory and file write permissions in .NET

In my .NET 2.0 application, I need to check if sufficient permissions exist to create and write to files to a ... catch (Exception) { success = false; } } Question&Answers:os...

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

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262 views

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c# - Is it possible to assign a base class object to a derived class reference with an explicit typecast?

Is it possible to assign a base class object to a derived class reference with an explicit typecast in C#?. I have tried it and it creates a run-time error. Question&Answers:os...

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

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91 views

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javascript - Replace multiple strings at once

Is there an easy equivalent to this in JavaScript? $find = array("<", ">", " "); $replace = array("<" ... replace here $("#output").html(textarea); ... Question&Answers:os...

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

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109 views

1 answer

performance - To Do or Not to Do: Store Images in a Database

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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java - Struts2 INPUT result: how does it work? How are conversion / validation errors handled?

Main Question The work flow should be like this: if an String is entered other than a number, first it should pass ... </result> </action> </package> </struts> Question&Answers:os...

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

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233 views

1 answer

swing - JTable not showing up on JFrame (Java)

I'm having a problem with a JFrame not showing a JTable that is added to it. I've tried getContentPane().add(..) ... main(String args[]) { new accCreator(); } } Question&Answers:os...

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

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56 views

1 answer

c# - How do I get output from a command to appear in a control on a Form in real-time?

From various sources on the web, I have put together the following code for executing a command via CMD.exe and ... out? I'm sure I'm missing something. Question&Answers:os...

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

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445 views

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javascript - Programmatically Lighten or Darken a hex color (or rgb, and blend colors)

Here is a function I was working on to programmatically lighten or darken a hex color by a specific amount. ... console.log( LightenDarkenColor("3F6D2A",40) ); Question&Answers:os...

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

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