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Extract a substring according to a pattern
...we create a data frame with two columns, one for the part before the colon and one for after, and then extract the latter.
library(dplyr)
library(tidyr)
library(purrr)
DF <- data.frame(string)
DF %>%
separate(string, into = c("pre", "post")) %>%
pull("post")
## [1] "E001" "E002" "E00...
Connect to a heroku database with pgadmin
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Open the "Properties" of the Heroku server in pgAdminIII and change the "Maintenance DB" value to be the name of the database you want to connect to.
The default setup is suitable for DBAs et al who can connect to any database on the server, but apparently that isn't true in you...
How do I compare two files using Eclipse? Is there any option provided by Eclipse?
...orer / Navigator with control-click. Now right-click on one of the files, and the following context menu will appear. Select Compare With / Each Other.
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When to use pip requirements file versus install_requires in setup.py?
I'm using pip with virtualenv to package and install some Python libraries.
4 Answers
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Usage of EnsureSuccessStatusCode and handling of HttpRequestException it throws
...sage.EnsureSuccessStatusCode() ? It disposes of the Content of the message and throws HttpRequestException , but I fail to see how to programmatically handle it any differently than a generic Exception . For example, it doesn't include the HttpStatusCode , which would have been handy.
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PHP Pass by reference in foreach [duplicate]
...e, the last array item takes the current loop value: 'zero', 'one', 'two', and then it's just 'two'... : )
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Error message “No exports were found that match the constraint contract name”
This morning I faced a problem while opening my Visual Studio solution, and when I tried to run it, it said:
26 Answers
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Given an array of numbers, return array of products of all other numbers (no division)
I was asked this question in a job interview, and I'd like to know how others would solve it. I'm most comfortable with Java, but solutions in other languages are welcome.
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HttpListener Access Denied
...es.Add("http://*:4444/"); must match EXACTLY with the one in the netsh command. For example, I had httpListener.Prefixes.Add("http://127.0.0.1:80/"); and the same netsh command you have, and the HttpListenerException will still be thrown. I needed to change httpListener.Prefixes.Add("http://+:80/"...
How to handle the modal closing event in Twitter Bootstrap?
... to figure out if there is a way to listen to the close event of the modal and execute a function.
5 Answers
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