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In-place edits with sed on OS X
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sed -i -- "s/https/http/g" file.txt
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C# constructor execution order
... for those who learn by example this fiddle illustrates the order as well: https://dotnetfiddle.net/kETPKP
using System;
// order is approximately
/*
1) most derived initializers first.
2) most base constructors first (or top-level in constructor-stack first.)
*/
public class Program
{
p...
How to permanently export a variable in Linux?
...enjdk11
Immediately apply all changes:
source ~/.bash_profile
Source: https://www.serverlab.ca/tutorials/linux/administration-linux/how-to-set-environment-variables-in-linux/
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What's the difference between a POST and a PUT HTTP REQUEST?
...by browser when it knows it talks to a proxy and the final URI begins with https://. The intent of CONNECT is to allow end-to-end encrypted TLS session, so the data is unreadable to a proxy.
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Change R default library path using .libPaths in Rprofile.site fails to work
...rocess can be read at ?Startup help page and there is RStudio material at: https://support.rstudio.com/hc/en-us/articles/200549016-Customizing-RStudio
In your case it appears that RStudio is not respecting the Rprofile.site settings or perhaps is overriding them by reading an .Rprofile setting from...
How do I declare an array of weak references in Swift?
...2.2 (swiftlang-703.0.18.1 clang-703.0.29).
Code can be grabbed from Gist.
https://gist.github.com/codelynx/30d3c42a833321f17d39
** ADDED IN NOV.2017
I updated the code to Swift 4
// Swift 4, Xcode Version 9.1 (9B55)
class WeakObject<T: AnyObject>: Equatable, Hashable {
weak var object...
Bootstrap 3.0 - Fluid Grid that includes Fixed Column Sizes
...do this, I have written up a short guide with a more general use case here https://www.atlascode.com/bootstrap-fixed-width-sidebars/. Hope it helps.
The bootstrap3 grid system supports row nesting which allows you to adjust the root row to allow fixed width side menus.
You need to put in a padding...
Which UUID version to use?
...ashing a URL you would use NAMESPACE_URL:
uuid.uuid3(uuid.NAMESPACE_URL, 'https://ripple.com')
Please note that this UUID will be different than the v5 UUID for the same URL, which is generated like this:
uuid.uuid5(uuid.NAMESPACE_URL, 'https://ripple.com')
A nice property of v3 and v5 URLs is t...
PSQLException: current transaction is aborted, commands ignored until end of transaction block
...me work done on the postgresql JDBC Driver, related to this behaviour:
see https://github.com/pgjdbc/pgjdbc/pull/477
It is now possible, by setting autosave=always in the connection (see https://jdbc.postgresql.org/documentation/head/connect.html) to avoid the 'current transaction is aborted' synd...
How to generate a Dockerfile from an image?
...d export Dockerfile. Parameter -sV=1.36 is not always required.
Reference: https://hub.docker.com/repository/docker/alpine/dfimage
below is the old answer, it doesn't work any more.
$ docker pull centurylink/dockerfile-from-image
$ alias dfimage="docker run -v /var/run/docker.sock:/var/run/docker.so...