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dataframe - Efficiently concate character content within one column, by group in R

What is the fastest way to perform concate-like operation over a data.frame in R? Suppose I have the following ... good idea how to apply it. 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++ - Dynamic vector of contiguously allocated objects in the Heap

I am trying to build a class to manage a std::vector<T*> of pointers to objects that must be contiguously ... most generic way of achieve this? 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# - an unsecured or incorrectly secured fault was received from the other party

I have a Windows program that calling a WCF service. This service after a few times be strongly slow and ... service starts again. sincerely. See Question&Answers more detail:os...

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

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css - position element fixed beside image

Hey guys it a bit hard for me to explain, but I'll try as best I can. I have a sharing div on my ... . The sharing buttons goes over the image 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++ - Xcode8 - Program is not executing correctly

While using Xcode8 says that it is running but there is no output. Output: 10 Please enter the rectangle's length: 10 ... " << ca << endl; } 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 - Canvas Game Animation

So I a making a game and got the idea of having a semi transparent png animation from a spritesheet to appear when ... s my first 'proper' game! 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# - EntityFramework pence to pounds

I'm building a WPF application. I made my database using Code-First. I need to insert prices of items in ... numbers of my value as decimal? 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,unix command ,imagick ,overflow

This is Add text to image echo system('convert mug.jpg -font courier -fill green -pointsize 30 -annotate +100+ ... image how can we over come? See Question&Answers more detail:os...

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

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r - How do I apply the regression for subgroups within the population?

Let's say I have the following data frame weight <- c(100, 137, 158, 225, 149) age <- c(15, 18, 21, ... ~ weight, data=table (gender="Female")) See Question&Answers more detail:os...

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

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font detection through javascript only( no flash)

here is the code for detecting installed fonts available to a browser though javascript,css method.(no flash). ... list text in the browser. See Question&Answers more detail:os...

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

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mysql - Do you already have another mysqld server running on port: 3306 Ubuntu

I am new to Ubuntu and I am trying to run mysql using xampp. Earlier xampp was run successfully and able to ... wrong and how to resolve this? 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 do I sort my File (highscores) with python?

I'm currently working on a dice game for my computer science coursework. I'm on the last bit of it which ... should be at the top. 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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xcode - Flappy Bird Coding Error in Swift

I've encountered a coding error for my flappy bird project, in Xcode 6.1. The code is to allow rotation of the ... , and it worked in the video. 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 - Can someone explain the formula

I have found a formula which does the following: https://threejs.org/examples/css3d_periodictable.html (the sphere ... help me Thanks in advance See Question&Answers more detail:os...

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

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git - Gitosis won't create repository

I'm testing my new Git repository. I converted from Subversion to Git, no problem. Now, on my laptop git remote ... figure out what's going on? 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 a sprite sheet with multiple sprites

Hey guys so I have a sprite sheet with multiple sprites that I want to use to animate a website using canvas. ... P.S I'm using javascript. See Question&Answers more detail:os...

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

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spring - Calling multiple API in sequence with token in java

I have to call 5 APIs in sequence after generating the token. i am using below API to generate token. POST ... I am interested in architecture. 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# - Windows Phone 8.1 BitmapDecoder async/await not stepping through the entire function

This is a follow up to an answer to a question I had previously posted here. I put the suggested ... suggestions 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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javascript - Date Validation for Birth Date, Joining Date and Leaving Date

I have three textboxes for BirthDate, JoiningDate & LeavingDate. Now what I want is:- Joining date and Leaving date should ... div> </td> </tr> 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 publish Spring Batch Metrics to Prometheus Gateway

I have a spring batch jobs in which I want to push metrics to Prometheus as suggested here I have a ... in jobname and grouping key.? 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 - Hide Image when another image is clicked

this seems to be simple.. but I am a bit noobish with jquery, maybe I am doing something silly wrong? I want ... code also does not work... See Question&Answers more detail:os...

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

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fstream - C++ ofstream not writing to output file?

The code is supposed to count the number of a, b, c, d, e, and f characters in the input text file and ... iFile.close(); oFile.close(); } 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# - Asynchronous tasks, waiting in main thread for completition

I have set up quite detailed example for this task, it may be poorly written in terms of architecture and some . ... "nothing left to do" state? See Question&Answers more detail:os...

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

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JMeter Groovy - WebDriver Sampler Dynamic Name with Response Code 500

I have tired to below code and variable with JMeter Groovy WebDriver Sampler. It's not working and return ... here enter image description here See Question&Answers more detail:os...

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

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botframework - LUIS consider TIME and DURATION as number ENTITY

I was expecting entities such DATE, TIME, DURATION & No Of People Joining the Call in below JSON. Now i got entities back ... ": "30" } } ] } See Question&Answers more detail:os...

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

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sql server - Complex SQL View with Joins & Where clause

My SQL skill level is pretty basic. I have certainly written some general queries and done some very generic ... ask if you need clarification. See Question&Answers more detail:os...

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

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300 views

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ajax - Wishlist heart icon color change based on selection in laravel 5.7

my requirement of coding is "when i am click on wishlist heart icon. if i am not login, then i am going to login page ... }); }); }); </script> 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 - Google Maps: Custom Marker Icon - Not plotting at Center of Rectangle

Trying to plot a rectangle area with bounds lat/lng, also plotting a marker at the center of the area, when ... any solution to this issue. See Question&Answers more detail:os...

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

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