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c++ - OpenCV unable to set up SVM Parameters

I have just started my learning on SVM using C++ OpenCV and was referring to the SVM documentation here. I ... are working well except 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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php - org.json.JSONException: Value <br of type java.lang.String cannot be converted to JSONObject

I m trying to do a registration page from an android activity connectiong the datas to my sqldatabase, I m getting this ... " => $msg))); ?> 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 - Infinite background for game

I am working on a Java project to simulate the flight of a helicopter in a frame. The helicopter moves on ... How to show the BG continuously? See Question&Answers more detail:os...

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

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jfreechart - How to set different colors to the bars in stacked bar chart in ireport?

I need to set a unique color to each bar in the stacked bar chart. Whatever the color I see in one bar ... ms paint. Stacked Bar MS Paint Image See Question&Answers more detail:os...

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

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scala - Explanation of fold method of spark RDD

I am running Spark-1.4.0 pre-built for Hadoop-2.4 (in local mode) to calculate the sum of squares ... explain what exactly is happening 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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Adding Google Cloud Messagin (GCM) for Android - Registration process

I have been struggling with GCM implementation for some weeks now, but how I really want to get to understand ... > </application> </manifest> See Question&Answers more detail:os...

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

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sql - MySQL concatenation operator

I don't know concatenation operator for MySQL. I have tried this code for concatenation: SELECT vend_name || ' ... I use to concatenate strings? 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 well does jQuery support backward compatibility?

We have had issues with Mootools not being very backward compatible specifically in the area of drag and drop ... of the older version? See Question&Answers more detail:os...

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

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php 7.4 - Trying to access array offset on value of type bool in PHP 7.4

I just upgraded my server's PHP version to PHP 7.4.1 and now getting this error: Notice: Trying to access array ... the fix for PHP 7.4 ? See Question&Answers more detail:os...

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

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SQL Server 2008 - Help writing simple INSERT Trigger

This is with Microsoft SQL Server 2008. I've got 2 tables, Employee and EmployeeResult and I'm trying to write ... int Department, varchar (50) See Question&Answers more detail:os...

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

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Backwards-compatible input calls in Python

I was wondering if anyone has suggestions for writing a backwards-compatible input() call for retrieving a ... Anyone have any suggestions? See Question&Answers more detail:os...

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

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scala - How do I make a function involving futures tail recursive?

In my Scala app, I have a function that calls a function which returns a result of type Future[T]. I ... FactorialCalc.factorial(4), 5.seconds) See Question&Answers more detail:os...

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

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php - Routing controllers in subfolders using CodeIgniter

since i want to separate the frontend and backend of the system. i have created 2 folders inside controllers ... (without using any htaccess) 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 - How to call setUndecorated() after a frame is made visible?

In my Swing application, I want the ability to switch between decorated and undecorated without recreating the entire ... a frame is visible?. See Question&Answers more detail:os...

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

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swift - Value of type 'StorageMetadata' has no member 'downloadURL'

Hey I need help with this coding, i'm not sure what has happened. It was working the other day. The error ... / failed completion(nil) } } } 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# - WPF DataBinding not updating?

I have a project, where I bind a checkbox's IsChecked property with a get/set in the codebehind. However, when ... Thanks, it'd 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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Python import precedence: packages or modules?

I wasn't clear how to correctly name this question. Case 1 Assume that I have the following directory ... detect this from occurring? 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# - Parse string to enum type

I have an enum type like this as an example: public Enum MyEnum { enum1, enum2, enum3 }; I'll read a ... parse a string to a MyEnum 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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When are braces optional in Java 8 lambda syntax?

I realise that the Java 8 lambda implementation is subject to change, but in lambda build b39, I've found that ... explain what's going on 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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C++ method only visible when object cast to base class?

It must be something specific in my code, which I can't post. But maybe someone can suggest possible causes ... does not take 1 argument 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 SE + Spring Data + Hibernate

I am trying to start a Java SE application with Spring Data + Hibernate and have done the follwowing till now: ... idea what I'm doing wrong? See Question&Answers more detail:os...

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

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opencv - java.lang.UnsatisfiedLinkError: Native Library XXX.so already loaded in another classloader

I have deployed one web-application, which contains following code. System.loadLibrary(org.opencv.core.Core. ... (Highgui.java:362) See Question&Answers more detail:os...

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

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scala - How to get path to the uploaded file

I am running an spark cluster on google cloud and I upload a configuration file with each job. What is ... .properties --jars my.jar 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 - jQuery position DIV fixed at top on scroll

I have a page that's fairly long and within the layout's menu, there's a flyout menu. I'd like this flyout portion of ... "top","33px"); } } }); 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 - Adding char and int

To my understanding a char is a single character, that is a letter, a digit, a punctuation mark, a tab, a space ... I end up with the output 50? 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# - Comparing floating point values

I just read a statement about the floating point value comparison Floating point values shall not be compared ... two floating point values? 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 handle chrome extension updates from content scripts

In background page we're able to detect extension updates using chrome.runtime.onInstalled.addListener. But after ... losing the user data? See Question&Answers more detail:os...

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

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regex - Does MySQL Regexp support Unicode matching

Does anyone know if Mysql's regexp supports unicode? I've been doing some research and the majority of blogs etc. ... if my text is unicode. See Question&Answers more detail:os...

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

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