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dataframe - frequency count of a column based on two other columns

I am relatively new to r and I got the following problem, I hope you can help me with. I have a table with a ... me out on this. Thank you! :) See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c - How do I determine the internal HWND used by COM in my current process?

I want to Post messages directly to the HWND that's owned by COM in my process. How do I get the ... using in single-threaded-apartment mode? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - Open Visual Studio 2008 Solution in Visual Studio 2013 without Upgrading

In short: I need to open an application originally built in Visual Studio 2008 (version 9) in Visual ... guidance will be greatly appreciated! See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c++ - populating a string vector with tab delimited text

I'm very new to C++. I'm trying to populate a vector with elements from a tab delimited file. What is the easiest way to do that? Thanks! See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Perfect matching in perl

I have a problem about perfect matching.I want to get the sum of positive and negative integers from a file . ... not print above the results. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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php - how to insert the multi-select value in codeigniter

iam using codeigniter <select id="example-label" multiple="multiple"> <option value="option-1">Option 1</ ... to insert multi-select value See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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How to upload arules package in R

I am not able to upload arules package Below is the following command I am using library(arules) I have downloaded ... . Can anyone help me out See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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backtracking - Explanation of 8-Queen solution Java code.

I found a 8-Queen solution that I was able to compile and run in Eclipse. I believe this solution follows the backtracking ... ("|"); } } End. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - Removing ASCII characters in a string with encoding

I have a byte array which is filled by a serial port event and code is shown below: private ... characters without using replace method? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - Eclipse Error: "Unable to locate executable for jre7"

Eclipse keeps giving me the above error when trying to run my test class. JDK is properly installed and I've ... like this with other IDEs. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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arrays - CodeSignal problem. I want to complete the code

I have the following problem. The function printMatrix Receive an matrix for example: matrix: [[0,1,1,2], ... something not a structure or union See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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web - How can I do a countdown timer with html?

I'm helping my I.T teacher to create easter eggs for some tasks, and I would like to create a countdown ... I hope you will understand, thanks! See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Print the contents of a multidimensional array php

I am trying to print the contents of a multidimensional array using a while loop. only the word "array" is displayed 4 times ... " "; $i++; } ?> See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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C error with Flex: type specifier missing?

Running the code below in iTerm2 bash. Code file was created using Vim. /* just like Unix wc */ %{ int chars = 0; ... this is a text ^D 1 4 15 See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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java - wait until current media finish playing before it play another in android

Here is my media player code in android. My problem is the loop plays all the files from the zipfolder without ... ; super.onDestroy(); } } See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - Using fetch with Passport gets "No 'Access-Control-Allow-Origin' header is present on the requested resource."

I am trying to put a button on my website which will let the user authorize access to his YouTube account. I am ... </script> </body> </html> See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to set second label on InfoWindow xamarin map

I want to set second label in info window on xamarin map. I use this example. So exactly I want to set ... like a second Label on InfoWindow ? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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swift - Fetch all children from database

In my app is tableview where i want to show all child of my customers. This is database structure: When ... Ben Smith and Tom Cruise)? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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winapi - Dock/Anchor alternative in C++ for List Control

In .NET there are Anchor & Dock properties that can make the controls responsive whenever you resize the ... #endif // not APSTUDIO_INVOKED See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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javascript - How to edit HTML (remove readonly) and type in input box using JS Executor?

This is the piece of HTML code on the particular page: <input size="24" autocomplete="off" id="sch-555-et ... , Java, Selenium, Maven and TestNg See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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vb.net - Text File Handling in Visual Basic

I have a text file contains delimited records. 1243;jhhf';982u4k;9u2349;huf8 kij;9238u;98ur23;jfwf;03i24 I need ... Any clue ? expecting VB CODE See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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Error while running spark-submit on python programs

I'm currently learning Apache-Spark and trying to run some sample python programs. Currently, I'm getting the below ... libexec/python/lib/pyspark.zip/pyspark/rdd.py", line 2596...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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How to animate image circular in css

I want to rotate the image and animate accordingly, can someone help me out, below is the ... /0B92S5c2PO_OIeUZJU0g2dnY3S3c/view?usp=sharing See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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matlab - define the prompted number is prime or not

i want a code to define the prompted number by user is prime or not . since it's an assignment i'm not ... prime ' message for 10 times . See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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c# - How to get the response from the keyboard input in telegram bot?

I want to use custom keyboard to get the selected option. How to get the selected option ? Is there any ... Is there any solution for c#? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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vb.net - Using variable in for next loop code

I have following code, My.Settings.h301 = TextBox301.Text My.Settings.h302 = TextBox302.Text My.Settings.h303 = ... next loop code. Thank you. See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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php - how to make if decision in swiftmailer to check if field is empty then do not send `td` to mail

I'm trying to send email(s) after submitting a form, I want to achieve: 1) If field is empty then no need ... ->addPart($content, 'text/html'); See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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php ZipArchive count number of files inside archive

I have this code: $za = new ZipArchive(); $za->open($downloadlink); echo "Number of files inside Zip = Unknown"; ... list. How can i do that ? See Question&Answers more detail:os...

asked Jan 31, 2022 in Technique[技术] by 深蓝 (71.8m points)

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