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r - How to combine ggplot and dplyr into a function?

Consider this simple example library(dplyr) library(ggplot2) dataframe <- data_frame(id = c(1,2,3,4), ... functions using ggplot and dplyr? See Question&Answers more detail:os...

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

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ruby - How to match something with regex that is not between two special characters?

I have a string like this: a b c a b " a b " b a " a " How do I match every a that is not part ... to remain in the string. I'm using Ruby. See Question&Answers more detail:os...

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

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html - CSS Grid Layout in Chrome seems not to work properly with more than 1000 rows

I have created an example of a sliding grid with fixed headers, using the "CSS Grid Layout" and "sticky position" ... grid" id="grid1"></div> 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# - Preserve data between application executions

I have an application with some textboxes. My user fills the textboxes and runs some methods, when they close the ... they good for this case? 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 "correctly" detect DPI of display with Java?

I have the following app that draws a rule : public class Rule extends JComponent { public static final long ... try them on your machine. See Question&Answers more detail:os...

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

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regression - Why the built-in lm function is so slow in R?

I always thought that the lm function was extremely fast in R, but as this example would suggest, the closed solution ... 156.7155 262.114 100 b See Question&Answers more detail:os...

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

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setlocale - Sort an array with special characters in PHP

I have an array that holds the names of languages in spanish: $lang["ko"] = "coreano"; //korean $lang["ar"] = ... is using PHP Version 5.2.13) See Question&Answers more detail:os...

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

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HTTP doesn't work in Android emulator

I tried multiple HTTP classes (HttpURLConnection, HTTPClient and others) but they don't work in emulator. ... NativeStart.main(Native Method) 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 do you start an Activity with AlarmManager in Android?

I've poured through a dozen tutorials and forum answers about this problem, but still haven't been able ... myReceiver in the manifest already See Question&Answers more detail:os...

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

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angular - Why am I getting the error plugin_not_installed with the Ionic Framework plugin healthkit?

I have been using Ionic Framework for a while but I have recently come across this error plugin_not_installed for the ... Misc: backend : pro See Question&Answers more detail:os...

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

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Copy Image to Clipboard from Browser in Javascript?

Is it possible to copy an image to the clipboard in javascript? I know how to copy text, but can you copy images? Is it a security limitation? 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++ - Optimization of raw new[]/delete[] vs std::vector

Let's mess around with very basic dynamically allocated memory. We take a vector of 3, set its elements and ... the raw memory allocation case? 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 - App hangs up or "Not on FX application thread" occurs during app activity

The application reacts on actions which occur on gamepad. When button is pressed something happens on UI. But I ran ... loop). What did I 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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Mix Python Twisted with multiprocessing?

I need to write a proxy like program in Python, the work flow is very similar to a web proxy. The program ... elegant way by just using Twisted? 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# - Simple token based authentication/authorization in asp.net core for Mongodb datastore

I need to implement pretty simple auth mechanizm with basically 2 roles: Owners and Users. And I think that having ... token I send in header? 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# - Sorting a linked list

I have written a basic linked list class in C#. It has a Node object, which (obviously) represents every ... working from this sample: 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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javascript - Stop IE from loading dynamically included script twice

I am including some related content on misc. web pages by adding a <script> tag near the end of the <body ... that IE8 loads js_test2.js twice. See Question&Answers more detail:os...

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

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jquery - Popover hides parent element if used with Prototype JS

After updating to bootstrap 2.3.0 I noticed strange behaviour of popover tooltip. If you enter the field and try ... ://jsfiddle.net/U6EDs/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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r - How can I prevent rbind() from geting really slow as dataframe grows larger?

I have a dataframe with only 1 row. To this I start to add rows by using rbind df #mydataframe with only one ... make this type of code faster? 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 - returning a default value

I'm looking to mimic the behavior of built-in functions (like getattr) that allow the user to specify a "default ... python 3.2 if that matters) 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# - Cookie Authentication expiring too soon in ASP.NET Core

I have a ASP.NET Core 1.1.2 project in which I am using cookie authentication. I am having a problem where ... , but the URL ends in Sprout. See Question&Answers more detail:os...

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

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gcc - C code with undefined results, compiler generates invalid code (with -O3)

I know that when you do certain things in a C program, the results are undefined. However, the compiler ... generating a ud2 instruction... See Question&Answers more detail:os...

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

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Google Places AutoComplete on iOS - Can't Load Search Results - Try Again

I am posting this here because I don't know where else to post this. Today, our application is no longer ... -and-instead-shows-cant-load-search 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. How to use Self Join

I need to use Self Join on this table. +------------+------+--------+ | Country | Rank | ... am getting only Turkey. What am I 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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javascript - Angle gradient in canvas

I'm looking for a code that permits to have this effect on a canvas' stroke. I've already got an ... available here (the review rating) See Question&Answers more detail:os...

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

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Passing a List to another Activity in Android

I've created a list and would like to pass the list to another activity but i'm getting an error on the putExtra ... intent, 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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java - How to deal with JAXB ComplexType with MixedContent data?

I got this XML structure: <Tax> <Money currency="USD">0.00</Money> <Description xml:lang="en"> 17.5% ... to deal with a Serializable element) 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 - Checking if a URL exists or not

I need to check whether a URL exists or not. I want to write a servlet for this i.e. to check whether ... , then it should return some message. See Question&Answers more detail:os...

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

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