Injecting text in html lists into lists using Sass

I wanted to test out if I could inject text via Sass style sheets to see if Sass could somehow support this. Of course, this is already possible in CSS using the nth-child selector and the ::after selector. Here is a sample of the technique used in this article! In Sass, however, we can inject text into a large list if we want. This means that the DOM must support the data you want to inject, if you want to inject for example five strings into an array of <ul> of <li> items, you must also have five items of <li> Anyways, this is what I ended up with:

$baskerville-font-stack: "Big Caslon", "Book Antiqua", "Palatino Linotype", Georgia, serif !default;

ul li {
 font-family: $baskerville-font-stack;
}

$coolitems: ('wig', 'makeup', 'lipstick', 'rouge', 'botox');

@for $i from 1 to length($coolitems)+1{
 $coolitem: nth($coolitems, $i);
 li:nth-child(#{$i})::before {
  content: $coolitem;
 }
}

$blogtitle: "Tores jævlige rosablogg"; 

We first declare an array in Sass using $coolitems: ('wig', 'makeup', 'lipstick', 'rouge', 'botox'). We then use the @for loop in Sass to get loop through this array. The syntax is: @for $i from 1 to length($coolarray)+1 I had to use the +1 here in my sample.. Then we grab hold of the current item using the nth function, passing in the array $coolitems and specifying the index $i. Now that we have the item of the $coolitems array, we can set the content CSS property of the n-th child and use the ::before (or ::after) selector. I tried to avoid using the +1 in the for loop, but then the last item of my array was not included in the list. Note - the use of the #{$i} in the syntax above. This is called variable interpolation in Sass. It is similar syntax-wise to variable interpolation in shell scripts, actually. We use it so that we can refer to the variable $i inside the nth-child operator of CSS selector. And the nth operator is as noted used to grab hold of the nth item of the Sass array. And your HTML will then look like this:

  <ul> 
            <li></li>   
            <li></li>           
            <li></li>  
            <li></li>    
            <li></li>        
        </ul>

So you actually now have a list in HTML which is empty, but the values are injected through CSS! And Sass makes supporting such scenarios easier. Now why the heck would you want such a thing? I do not know, I am more a backend developer than webdev frontend developer, it is though cool that you can load up data into the DOM using Sass and CSS

Some handy Git tips - show latest commits and searching the log and more

This article will present some tips around Git and how you can add functionality for showing the latest commits and search the log. I would like to search these aliased command to show you how they can ease your everyday use of Git from the commandline.

[alias]

glog = log --all --decorate --oneline --graph

glogf = log --all --decorate --oneline --graph --pretty=fuller

st = status

out      = !git fetch && git log FETCH_HEAD..

outgoing = !git fetch && git log FETCH_HEAD..

in       = !git fetch && git log ..FETCH_HEAD

incoming = !git fetch && git log ..FETCH_HEAD

com = "!w() { git commit --all --message \"$1\";  }; w"

undopush = "!w() { git revert HEAD~\"$1\"..HEAD;  }; w"

searchlog = "!f() { git --no-pager log --color-words --all --decorate --graph -i --grep \"$1\";  }; f"

branches =  branch --verbose --sort=-committerdate --format '%(HEAD)%(color:yellow)%(refname:short)%(color:reset) -%(color:red)%(objectname:short)%(color:reset) - %(contents:subject) -%(authorname) (%(color:green)%(committerdate:relative)%(color:reset))'

allbranches = "!g() { git branch --all --verbose --sort=-committerdate --format '%(HEAD) %(color:yellow)%(refname:short)%(color:reset) -%(color:red)%(objectname:short)%(color:reset) - %(contents:subject) -%(authorname) (%(color:green)%(committerdate:relative)%(color:reset))' --color=always | less -R;  }; g"
verify = fsck
clearlocal = clean -fd && git reset 
stash-unapply = !git stash show -p | git apply -R 
lgb = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' --abbrev-commit --date=relative --branches tree = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' --abbrev-commit --date=relative --branches alltree = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' --date=relative --branches --all
latest = "!f() { echo "Latest \"${1:-11}\" commits accross all branches:"; git log  --abbrev-commit --date=relative --branches --all --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' -n ${1:-11};  } ; f"
add-commit = !git add -A && git commit
showconfig = config --global -e

[merge]
tool = kdiff3

[mergetool "kdiff3"]
cmd = \"C:\\\\Program Files\\\\KDiff3\\\\kdiff3\" $BASE $LOCAL $REMOTE -o $MERGED [core]
editor = 'c:/program files/sublime text 3/subl.exe' -w

[core]
editor = 'c:/Program Files/Sublime Text 3/sublime_text.exe'

The best aliases are how you set up Sublime Text 3 as the Git editor and also how you can show the latest commits. The latest commits use a parametrized shell function. I set the default value to 11 in this case, if you do not give a parameter. You can for example show the latest 2 commits by typing: git latest 2

latest = "!f() { echo "Latest \"${1:-11}\" commits accross all branches:"; git log  --abbrev-commit --date=relative --branches --all --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr) %C(bold blue)<%an>%Creset%n' -n ${1:-11};  } ; f"

Note the use of a shell function and also that we refer to the first parameter as ${1} i bash shell script, with a :-11 to set the first param as 11. The syntax is ${n:-p} where n is the nth parameter (not starting with zero!) and p is the default value. A special syntax, but that is how bash works. Also note that a git alias with a shell function can do multiple functions, separated with semi-colon ;. The searchlog alias / shell function is also handy:

searchlog = "!f() { git --no-pager log --color-words --all --decorate --graph -i --grep \"$1\";  }; f"

Also, multiple aliases here are similar to Mercurial's in and out commands to detect incoming pushed commits and outgoing local commits. Happy Git-ing!

Creating a validation attribute for multiple enum values in C#

This article will present a validation attribute for multiple enum value in C#. In C#, generics is not supported in attributes. The following class therefore specifyes the type of enum and provides a list of invalid enum values as an example of such an attribute.

using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

namespace ValidateEnums
{

    public sealed class InvalidEnumsAttribute : ValidationAttribute
    {

        private List<object> _invalidValues = new List<object>();



        public InvalidEnumsAttribute(Type enumType, params object[] enumValues)
        {
            foreach (var enumValue in enumValues)
            {
                var _invalidValueParsed = Enum.Parse(enumType, enumValue.ToString());
                _invalidValues.Add(_invalidValueParsed);
            }
        }

        public override bool IsValid(object value)
        {
            foreach (var invalidValue in _invalidValues)
            {
                if (Enum.Equals(invalidValue, value))
                    return false;
            }
            return true;
        }

    }

}

Let us make use of this attribute in a sample class.

 public class Snack
    {
        [InvalidEnums(typeof(IceCream), IceCream.None, IceCream.All )]
        public IceCream IceCream { get; set; }

    }

We can then test out this attribute easily in NUnit tests for example:

[TestFixture]
    public class TestEnumValidationThrowsExpected
    { 

        [Test]
        [ExpectedException(typeof(ValidationException))]
        [TestCase(IceCream.All)]
        [TestCase(IceCream.None)]
        public void InvalidEnumsAttributeTest_ThrowsExpected(IceCream iceCream)
        {
            var snack = new Snack { IceCream = iceCream };
            Validator.ValidateObject(snack, new ValidationContext(snack, null, null), true);
        }

        [Test]
        public void InvalidEnumsAttributeTest_Passes_Accepted()
        {
            var snack = new Snack { IceCream = IceCream.Vanilla };
            Validator.ValidateObject(snack, new ValidationContext(snack, null, null), true);
            Assert.IsTrue(true, "Test passed for valid ice cream!"); 
        }