January 10th, 2017
When trying to
a dotnet core 1.1 project you might receive
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| Publishing TheApp for .NETCoreApp,Version=v1.1
No executable found matching command "npm" |
The remedy is to install NPM.
If you are running OSX you probably got Homebrew with the installation.
So just
Then you might get
No executable found matching command “bower”
which means that Bower is missing. According to https://github.com/dotnet/cli/issues/3293 you should install it through npm like so:
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| npm install -g bower
npm install -g gulp |
January 7th, 2017
Prerequisite:
Docker and Dotnet Core 1.1 should be installed on the host (=OSX).
You have a folder somewhere, for instance /User/yourname/Documents/Docker/mywebapp.
Create the image
In your folder, create the dockerfile
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| FROM microsoft/dotnet
# VOLUME /Documents/Docker/mywebapp
EXPOSE 80
ENV "ASPNETCORE_URLS=http://+:80"
RUN mkdir app
WORKDIR /app
RUN dotnet new -t web
RUN dotnet restore |
Then execute
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| docker build -t mynick/myimage . |
in a terminal in said folder.
If you now execute
you can se the new image as mynick/myimage.
Create the container and start the web server
In the terminal execute
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| docker run \
-p 80:80 \
-ti --rm mynick/myimage \
/bin/bash -c 'cd /app; dotnet run;' |
Behold result
In a terminal execute
or in a web browser go to
January 3rd, 2017
Prerequisite
Install docker.
Install Dotnet Core 1.1.
Create web application
Create a directory “theapp”.
Open a terminal and, in the directory, execute:
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| dotnet new -t web
dotnet restore
dotnet run |
Check it works.
Execute, in a terminal:
Or is it
?
Create container
In a terminal execute:
(after you have have updated “YourRootedPathAndFolder” appropriately.
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| docker run -p 80:80 \
-e "ASPNETCORE_URLS=http://+:80" \
-ti --rm \
-v /YourRootedPathAndFolder/TheApp:/theapp \
microft/dotnet \
/bin/bash -c 'cd /theapp; dotnet restore; dotnet run' |
and when it is finished churning through the long list of modules open a new terminal and execute
on your host to receive a smaller waterfall of HTML.
That should be it.
Troubleshooting
If you forget to do the dotnet restore
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| docker run -p 80:80 \
-ti -v /Users/ola/Documents/Docker/loose/TheApp:/theapp \
microsoft/dotnet \
/bin/bash -c 'cd /theapp; dotnet run' |
You get something like:
Project theapp (.NETCoreApp,Version=v1.1) was previously compiled. Skipping compilation.
Error: assembly specified in the dependencies manifest was not found — package: ‘Microsoft.AspNetCore.Antiforgery’, version: ‘1.0.1’, path: ‘lib/netstandard1.3/Microsoft.AspNetCore.Antiforgery.dll’
Attach and request
Run
in a terminal. Note the Container ID.
Then execute, after the b5a…f5 is updated appropriately.
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| docker exec -it b5a8ccd5b1f5 bash |
Now you have a shell inside the container and should be able to get a result from:
December 31st, 2016
Install Dotnet core à la https://www.microsoft.com/net/core#macos
Create a folder and to to it.
Open a terminal (one cannot reuse any terminal from before dotnet was installed since the path is updated) and execute:
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| dotnet new -t web
dotnet restore
dotnet run |
Open another terminal and execute:
A pile of HTML should scroll into view.
In the first terminal you can see the reaction.
December 29th, 2016
Prerequisite
Install Docker on OSX.
Create Dockerfile
Create a file named Dockerfile in a new folder.
Its contents are:
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| FROM microsoft/dotnet
# VOLUME /Documents/Docker/dnc
EXPOSE 80
ENV "ASPNETCORE_URLS=http://+:80"
RUN mkdir app
WORKDIR /app
RUN dotnet new -t web
RUN dotnet restore |
Create image
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| docker build -t yournick/yourimagename . |
Run image
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| docker run -p 80:80 \
-ti --rm yournick/yourimagename \
/bin/bash -c 'dotnet run' |
See output
On the host:
and you should se a whole dab of HTMl. You can also watch it in your browser.
December 27th, 2016
Install Docker on OSX.
https://docs.docker.com/docker-for-mac/
Prepare local drive
(This is strictly not necessary but if you skip this you have to remove the -v and following path from the docker run command further down. You will also have to mkdir the app folder in the container before cd to it.)
Go to you your local Documents folder. Create a Docker folder. Inside it create a dotnetcore folder. This results in /Users/myname/Documents/Docker/dotnetcore.
Start container
Open a terminal and execute (after exchanging “myname” to your user’s name)
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| docker run -p 80:80 \
-e "ASPNETCORE_URLS=http://+:80" \
-v "/Users/myname/Documents/Docker/dotnetcore:/app" \
-it --rm microsoft/dotnet |
This will download the microsoft/dotnet image, start it, connect your host’s dotnetcore folder to an app folder inside the container, set an environment variable, publish the internal port 80 on port 80 and finally open a terminal inside the container; all in one go.
Start the web server
Now inside the container execute
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| cd app
dotnet new -t web
dotnet restore |
Absolutely not necessary but if you
you will see something like
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| namespace WebApplication
{
public class Program
{
public static void Main(string[] args)
{
var host = new WebHostBuilder()
.UseKestrel()
.UseContentRoot(Directory.GetCurrentDirectory())
// .UseUrls("http://0.0.0.0:8000")
.UseIISIntegration()
.UseStartup<Startup>()
.Build();
host.Run();
}
}
} |
Start the web server through
This will also compile the code before starting the application.
See output
If you open
in your host’s web browser you should now see a page about Dotnet aspnet core.
That all there is to it!
Trouble shooting
If you don’t check that the web server is running and listening on port 80 locally. This is done by opening a new terminal and check the ContainerID through
Then you attach a terminal to the running container.
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| docker exec -it d10988067ec8 bash |
(but with proper id)
Now, inside the container, run
and you should get a boatload of HTML back. In the other terminal window you should see some reaction to the request.
Links
More thourough but for version 1.0
https://store.docker.com/images/6c038a68-be47-4d7e-bfd2-33a6fe75b9ac?tab=description
November 30th, 2016
A tablet is not only for onsuming what other people have done. You can too. Also a kid can.
Bloxels
Create your own side scroller.
There is also hardware if you want.
http://www.bloxelsbuilder.com/
Coda game
I have not tested
http://filimundus.com/coda-game/
Daisy the dinosaur
There is not a clear goal, just fiddle around. For good and bad. It is like making movies in ScratchJr but only side scrolling and less effects.
http://daisythedinosaur.com/
The Foos
It is like Lightbot but side scrolling and with funnier characters. The goal is somewhat funnier compared to lightbot; getting a donut for a (US) police officer instead of just lighting a light bulb. To try it out there is an older? version on the web.
http://thefoos.com/play/
Hopscotch
Like Scratch.
https://www.gethopscotch.com/
Hour of code
Lots of stuff.
https://code.org/
Lego Minecraft
Hard to use computer interface.
Expensive.
Light bot
Make a little robot find her way around stairs and obstacles.
https://lightbot.com
Light bot looking but with famous figures like angry birds
https://studio.code.org/hoc/1
Minecraft (pocket edition)
https://minecraft.net/pocket
Scratch(Jr)
Unlogical user interface.
https://scratch.mit.edu/
Also see https://www.dexterindustries.com/BrickPi/program-it/scratch/ for using Scratch with Raspberrypi.
More mechanical than programming
Pettson and Findus
http://filimundus.com/pettsons-inventions/
http://filimundus.com/pettsons-inventions-2/
https://filimundus.com/pettsons-inventions-3/
Inventioneers
http://filimundus.com/inventioneers/
I have not tested
Cargo-bot
https://itunes.apple.com/us/app/cargo-bot/id519690804
Tynker
I have not tested.
https://www.tynker.com/
Move the turtle
itunes.apple.com/us/app/move-turtle.-programming-for/id509013878?mt=8
On a proper computer
Blockly
https://blockly-games.appspot.com/?lang=en
October 20th, 2016
Due to overzealous user interface design Skype does not close with alt-F4 but instead minimises. That is not considered good behaviour.
I have found no setting in Skype to restore it normal Windows behaviour.
So I found and copied a Authotkey script that restores makes alt-F4 properly close Skype.
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| #IfWinActive ahk_exe Skype.exe ahk_class tSkMainForm
!f4::
WinClose
ExitApp
Return
#IfWinActive |
Kudos to original article https://autohotkey.com/board/topic/126066-script-to-run-skype-with-real-alt-f4/
September 29th, 2016
Albeit code reviewing is for the greater good and we all adhere to the idea of common ownage of code we are still critisising someone else’s labour.
Psychologically we cannot neglect that.
Ergo: remember to tell about the good solutions and code you find.
Unfortunately TFS does not have a (good) solution for differentiating between comments and praise and critisism.
September 27th, 2016
I have found out that Automapper needs to be set up once and only once.
This means that one place has to know of all the classes that have a mapping. In a multi tier application this is not possible without treading on someone’s toes.
I have seen a solution which loops through all loaded assemblies and maps once and for all. But this solution means we have one such point – like when a web app is loading. So if you have automatic tests, that setup has to be called from there. And any kind of automatic loading of assemblies cannot use Automapper. Well… if one reinitialises all mappings one can.
I might see another solution where one has one assembly that knows of all assemblies (with mapping) and makes sure Automapper is initialised. My experimentation with this lead to circular reference problem though.
When I am at it – the documentation is short and straight to the point (good) but misses the point that the code in the documentation should be usable (not good).
The API was not explorable, which means that there is no natural way to start mapping and find out how the API works as one goes. Instead I had to google and find a bit here and a bit there.
With that said – it still solved a problem for me. And that is considered good.