June 17th, 2017
The question is not “Can you do x before month’s end?”.
The question is “Can you remove something that is less important than x?”
In an earlier project I had all my tasks on a wall so when someone wanted a task done they had to physically remove a note and instantly knew that another task would not be done (until something else was done or removed).
To put even more stress on the person, let’s call him Andersson, wanting to allot some of my time the notes/tasks had different owners. This meant that Andersson got a physical feeling that his/her work was more important than someone else’s.
“Do you think I can remove Svenssons note?”
“I don’t know. Ask him.”
This meant I didn’t have to switch task and search out Svensson and present someone else’s task and then come back to Andersson with a result.
Andersson understood his/her action had impact on two other people. Andersson’s problem was still in his/her hands.
My time spared. Svensson’s time spared.
Andersson didn’t have to wait for a decision from someone else.
All win.
June 2nd, 2017
I am presently using TFS’s code reviewing tool and IMHO it lacks visualisation of which comments are important and which are not.
So I came up with the idea of prefixing my comments.
PRAISE: Good refactoring, I like how you remove the negation.
FIX: A null check is missing.
SUGGESTION: Split line.
CHECK: Is it the right enum used here?
EXPLAIN: Is this comparison really correct? I guess so but how does it work?
If there are many FIX but only one or a few are critical I prefix the critical once with RED, like RED FIX.
This gives the oppurtunity to “while you already are in the file, do these things too”.
When code reviewing do not forget to give appraisal too
April 28th, 2017
I have started developing a lib for creating pseudo randomised data. (yes, I know all randomised data on a computer is pseudo randomised, but in my case I want to control the seeding)
The lib, basically, is the ordinary dotnet random class with constructor with some customised constructors to make it easier to add a known seed. It also contains methods for randomising strings with a prefix, a certain length, int, long, decimal, guid, enum and other stuff that is often used.
The seeding is taken from the test method’s name.
This will give the same values for every test run of that method.
February 12th, 2017
Prerequisite
See Compile Aspnet core 1.1 outside Docker container but run within
Create a controller
Create a file TodoController.cs file in the same folder as HomeController.cs file. In a real application we should probably put it in a folder “api” or similar.
Fill it with the text below (which is a refinement of https://docs.microsoft.com/en-us/aspnet/core/tutorials/first-web-api ):
[Update:There is now a
or similar so you don’t have to copypaste the code below. I plan to write about it as soon as I can.]
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| using System.Collections.Generic;
using System.Linq;
using Microsoft.AspNetCore.Mvc;
namespace WebApplication.Controllers
{
// Setting the Route attribute is important.
// Otherwise we don't get the restish behaviour we're looking for.
// I cannot say exactly why this is so.
[Route("api/[controller]")]
public class TodoController : Controller
{
private static List _data =
new List{
new Item{
Id = 1,
Name = "One"
},
new Item{
Id = 2,
Name = "Two"
},
};
[HttpGet]
public IEnumerable<item> GetAll()
{
return _data;
}
[HttpGet("{id}", Name = "GetTodo")]
public string Get(int id)
{
return _data.Single(d => d.Id == id).Name;
}
[HttpPut("{id}")]
public IActionResult Put(int id, [FromBody] string name)
{
GetItem(id).Name = name;
return new NoContentResult();
}
[HttpPost]
public IActionResult Post(string name)
{
var item = new Item { Id = _data.Count() + 1, Name = name };
_data.Add(item);
return CreatedAtRoute("GetTodo", new { id = item.Id }, item);
}
private Item GetItem(int id)
{
return _data.Single(d => d.Id == id);
}
}
public class Item
{
public int Id { get; set; }
public string Name { get; set; }
}
}
</item> |
Compile:
And start the web server with the application:
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| dotnet bin/Debug/netcoreapp1.1/MyWs.dll |
Call the controller
Start another terminal.
First check what we have.
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| curl localhost:5000/api/Todo |
Then check one item.
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| curl localhost:5000/api/Todo/2 |
Create a new.
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| curl --data "Name=Three" localhost:5000/api/Todo/
curl localhost:5000/api/Todo/3 |
Update an existing according to Stack overflow.
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| curl -H "Content-Type: application/json" \
-X PUT \
--data '"Tva"' \
localhost:5000/api/todo/2
curl localhost:5000/api/Todo/2 |
February 6th, 2017
There is no native image processing lib for dotnet core but someone at Microsoft has been kind enough to list 4 alternatives here.
January 24th, 2017
We all have this centrally keyboard key that is seldom used. I am thinking of caps lock.
I wanted to use it as an alternative key, not as ctrl or anything; but as something totally different that does not invade existing short cuts.
Rewiring the capslock is harder than it looks at first glance.
I didn’t find a Good solution but at least one that works; for now.
Autohotkey
Autohotkey aka AHK is for writing macros for keyboard, mouse(?) and joystick. The language is awful but don’t let that scare you away.
I have mapped CapsLock to be used with j, k, l and ; to navigate.
Capslock by itself is Esc.
Source code
Regular header stuff in the file:
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| #NoEnv ; Recommended for performance and compatibility with future AutoHotkey releases.
; #Warn ; Enable warnings to assist with detecting common errors.
SendMode Input ; Recommended for new scripts due to its superior speed and reliability.
SetWorkingDir %A_ScriptDir% ; Ensures a consistent starting directory. |
Make Capslock not work as capslock but also make it work as Esc:
(I believe some magic is involved.)
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| SetCapsLockState AlwaysOff
!CapsLock::CapsLock
CapsLock::Send {Esc} |
Map the personal stuff. In my case navigation:
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| CapsLock & j::Send {Left}
CapsLock & k::Send {Right}
CapsLock & `;::Send {Down}
CapsLock & l::Send {Up} |
Unfortunately I don’t remember the sources I puzzled together my solution form.
January 14th, 2017
Prerequisite
OSX
Docker
Dotnet core 1.1
A folder named (e.g.) /Users/yourname/Docker/Dandelion
and a folder named (e.g.) /Users/yourname/Docker/Dandelion/MyWeb
Create the web
In MyWeb run
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| dotnet new -t web
dotnet restore
dotnet build
dotnet publish |
Now we have a web site compiled and ready to run with [dotnet run].
You can run the app and then [curl localhost] to find out if it is runnable; but if you got no error message earlier all should be ok.
Create an image
Go to the Dandelion folder.
Create a file Dockerfile and paste into it:
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| FROM microsoft/dotnet
EXPOSE 80
ENV "ASPNETCORE_URLS=http://+:80" |
Then, to create the image run
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| docker build -t yourname/dandelion . |
Note that the name must be all small caps.
If you want to check that the image is created just execute [docker images] which should show the new image at the top of the list.
Start the container
Go to the Dandelion folder. (you are probably already standing there)
Execute
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| docker run -p 80:80 \
-ti --rm \
-v /Users/yourname/Documents/Docker/Dandelion/MyWeb/bin/Debug/netcoreapp1.1/publish:/MyWeb \
yourname/dandelion \
/bin/bash -c 'cd /MyWeb; dotnet MyWeb.dll' |
and your web should start.
Verify result
Either open another console and execute
or go to localhost in your web browser.
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: