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How to randomize (or permute) a dataframe rowwise and columnwise?
...2
a b c
3 0 1 0
4 0 0 0
2 1 0 0
1 1 1 0
By default sample() randomly reorders the elements passed as the first argument. This means that the default size is the size of the passed array. Passing parameter replace=FALSE (the default) to sample(...) ensures that sampling is done without replacem...
Docker - how can I copy a file from an image to a host?
...tion on copying files from containers to hosts; I have a Dockerfile that fetches dependencies, compiles a build artifact from source, and runs an executable. I also want to copy the build artifact (in my case it's a .zip produced by sbt dist in '../target/`, but I think this question also appli...
Error in exception handler. - Laravel
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How do I 'svn add' all unversioned files to SVN?
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Great. Also easy to expand, modify to delete etc.
– Drewid
Apr 18 '12 at 14:43
Perfect f...
OrderBy descending in Lambda expression?
I know in normal Linq grammar, orderby xxx descending is very easy, but how do I do this in Lambda expression?
6 Answers
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How do I determine if a port is open on a Windows server? [closed]
...of Windows) or any other software, then you have native PowerShell:
Test-NetConnection -Port 800 -ComputerName 192.168.0.1 -InformationLevel Detailed
(Unfortunately this only works with PowerShell 4.0 or newer. To check your PowerShell version, type $PSVersionTable.)
PS: Note, these days there a...
How does the bitwise complement operator (~ tilde) work?
... positive numbers. Think of -3 as the number to which 3 should be added in order to get zero and you'll see that this number is 1101, remember that binary addition is just like elementary school (decimal) addition only you carry one when you get to two rather than 10.
1101 +
0011 // 3
=
10000...
Upload file to FTP using C#
...ebClient does not offer (like TLS/SSL encryption, ASCII mode, active mode, etc), use FtpWebRequest. Easy way is to just copy a FileStream to an FTP stream using Stream.CopyTo:
FtpWebRequest request =
(FtpWebRequest)WebRequest.Create("ftp://ftp.example.com/remote/path/file.zip");
request.Credent...
How to loop through a directory recursively to delete files with certain extensions
...ique found file. At least this version works if there are no spaces, tabs, etc. in filenames. I rolled back to the old version. Noting sensible can really fix a for f in $(find ...). Just don't use this method.
– gniourf_gniourf
Nov 6 '14 at 20:14
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Runtime vs. Compile time
... files, interfaces, libraries, or other voodoo that it needed to import in order to get compiled.
Output is hopefully assembly code or relocatable object code or even an executable program. Or if something goes wrong, output is a bunch of error messages.
Run time
We know nothing about the prog...