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r - Inputting NA where there are missing values when scraping with rvest

I want to use rvest to scrape a page which has titles and run times of talks at a recent conference and then ... an NA to show missing values? See Question&Answers more detail:os...

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timer - Java - GUI clock using large amounts of RAM?

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.net - How to separate managed and unmanaged DLLs in another directory

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git - Copying Doxygen Documentation from gh-pages branch into a subfolder of Master branch

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Batch file to delete files older than N hours or minutes

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java - Firebase/Android: Adding retrieved values from Firebase to arraylist returns null pointer exception

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primary key - SQL Server "pseudo/synthetic" composite Id(key)

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fortran - Variable format

I wrote a program to calculate a square finite difference matrix, where you can enter the number of rows (equals ... and what is my mistake? See Question&Answers more detail:os...

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r - Save a ggplot2 time series plot grob generated by ggplotGrob

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iphone - UIView layout being reset

I am using a storyboard to create the initial state of my view. I then have a button that changes the ... any ideas why this is occurring? See Question&Answers more detail:os...

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firebase - CollectionGroupQuery but limit search to subcollections under a particular document

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vue.js - How to make dynamic routes on the vue router?

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c# - How can I capture as bitmap only what a picturebox is displaying, without using "copy from screen"?

Specifically: I need to capture as a bitmap a specific region of what a picturebox is actually displaying. The ... the bits it is displaying. See Question&Answers more detail:os...

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jsf - Conditionally render a component based on selectOneMenu value

Is there a way to render a component based on the current value the user has selected from a selectOneMenu ... boxes don't render/disappear. See Question&Answers more detail:os...

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dataframe - Merge multiple variables in R

I have a dataset such that the same variable is contained in difference columns for each subject. I want to merge them to ... DV_2 = c(3,3,5)) See Question&Answers more detail:os...

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powershell - Translating OS X Bash Script for Windows

I use Hedge to transfer Magic Lantern video files shot on my Canon 5D Mark III. On OS X, I'm able ... into a Windows equivalent? Thanks, Thomas See Question&Answers more detail:os...

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php - Fatal error: Call to a member function bindParam()

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java - JavaFX and SVG : drawing a line

I am using JavaFX to render some SVG stuff. I defined many methods, returning the paths of different SVG shapes ( ... , yet nothing is drawn... See Question&Answers more detail:os...

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Android 5.0.2 - SMS Broadcast Receiver - can not get it working

I am testing on Xiaomi Redmi Note 3 and what I need is very simple: * Register broadcast receiver for incoming text messages ... ()); } } } } } See Question&Answers more detail:os...

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perl - regex help on unix df

I need some help tweaking my code to look for another attribute in this unix df output: Ex. Filesystem Size Used Avail ... ); }; print "$cap "; See Question&Answers more detail:os...

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javascript - Can the mechanism that loads the worker in Shared Web Workers be modified?

Please see this related question for a background to this: How can I load a shared web worker with a ... order to perform the modification? See Question&Answers more detail:os...

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How to get appropriate images in respective android Device in Android Studio

I'm designing the layout of Music Player. When I'm rendering it with the Nexus 5 virtual device, I'm not ... get some solution from you guys. See Question&Answers more detail:os...

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java - How to initialize MongoClient once in Spring Boot and use its methods?

Hello I am trying to export the MongoClient after a successful connection in Spring Boot and I am trying to use it ... any Java file. Thank you See Question&Answers more detail:os...

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sql - MS Access Limit

What's the equivalent of mysql Limit in ms access. TOP is not sufficient since I'm going to use it for pagination. Thanks See Question&Answers more detail:os...

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java - Read data from CSV file into ArrayList and display in XY Chart

I would like to display a temperature curve over time. I have now read a file, which is CSV-similar, that ... as the output remain the same. See Question&Answers more detail:os...

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