Difference between JVM and HotSpot?
What exactly is HotSpot and how does it relate to JVM and OpenJDK? Is it a library? What exactly does it do? Also, what is the difference between OpenJDK and HotSpot? 6 Answers 6
Programming
How to interpret dplyr message `summarise()` regrouping output by ‘x’ (override with `.groups` argument)?
I started getting a new message (see post title) when running group_by and summarise() after updating to dplyr development version 0.8.99.9003. Here is an example to recreate the output: library(tidyverse) library(hablar) df <- read_csv(“year, week, rat_house_females, rat_house_males, mouse_wild_females, mouse_wild_males 2018,10,1,1,1,1 2018,10,1,1,1,1 2018,11,2,2,2,2 2018,11,2,2,2,2 2019,10,3,3,3,3 2019,10,3,3,3,3 2019,11,4,4,4,4 2019,11,4,4,4,4”) %>% convert(chr(year,week)) %>% mutate(total_rodents = rowSums(select_if(., is.numeric))) %>% … Read more
How to merge the current branch into another branch
I have two branches, master and dev. I always work on dev and only check code into the master branch once it’s been approved for production use. When I do so, I have to do the following: git checkout master git merge dev git checkout dev That’s awfully verbose, and since I do it frequently, … Read more
What are -moz- and -webkit-? [duplicate]
This question already has answers here: Why do browsers create vendor prefixes for CSS properties? (2 answers) Closed 2 years ago. -webkit-column-count: 3; -webkit-column-gap: 10px; -webkit-column-fill: auto; -moz-column-count: 3; -moz-column-gap: 10px; -moz-column-fill: auto; I am a beginner at CSS and when I was looking at some CSS code the other day, I found these lines. … Read more
How to translate between Windows and IANA time zones?
As described in the timezone tag wiki, there are two different styles of time zones. Those provided by Microsoft for use with Windows and the .Net TimeZoneInfo class (when running on Windows) are identified by a value such as “Eastern Standard Time”. Those provided by IANA in the TZDB, and used by the .NET TimeZoneInfo … Read more
Determining the path that a yum package installed to [closed]
Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it’s on-topic for Stack Overflow. Closed 10 years ago. Improve this question I’ve installed ffmpeg using yum under Redhat, and I’m having difficulty figuring out where (what path) it installed the package to. Is there … Read more
Git Clone from GitHub over https with two-factor authentication
I recently began using two-factor authentication on GitHub, and I am now unable to use git over https on private repos in the usual way: peter@computer:~$ git clone https://github.com/[…]/MyPrivateRepo Cloning into ‘MyPrivateRepo’… Username for ‘https://github.com’: […] Password for ‘https://[…]@github.com’: remote: Invalid username or password. fatal: Authentication failed for ‘https://github.com/[…]/MyPrivateRepo/’ If I disable two-factor authentication I … Read more
How to keep index when using pandas merge
I would like to merge two DataFrames, and keep the index from the first frame as the index on the merged dataset. However, when I do the merge, the resulting DataFrame has integer index. How can I specify that I want to keep the index from the left data frame? In [4]: a = pd.DataFrame({‘col1’: … Read more
What is the Visual Studio Code editor built on
What underlying technologies/libraries is Microsoft’s new (free) cross platform editor Visual Studio Code (Launched 5/29/2015) built on? There are rumors that it’s just Github’s Atom Editor rebranded. 1 Answer 1
pythonic way to do something N times without an index variable?
Every day I love python more and more. Today, I was writing some code like: for i in xrange(N): do_something() I had to do something N times. But each time didn’t depend on the value of i (index variable). I realized that I was creating a variable I never used (i), and I thought “There … Read more
