Today I Learned

I recently ran into an issue where adding hackney and running mix deps.compile would throw the following error:

===> Rebar3 detected a lock file from a newer version. It will be loaded in compatibility mode, but important information may be missing or lost. It is recommended to upgrade Rebar3.

Running mix local.rebar fixed my issue.

Here is how I rename a tag old to new:

git tag new old
git tag -d old
git push origin :refs/tags/old
git push --tags

Finally, make sure that the other users remove the deleted tag. Please tell them (co-workers) to run the following command:

git pull --prune --tags

There is no such thing as !True to get a False value in Elm.

The Elm way to achieve this is:

module Helpers.Bool exposing (flip)

flip: Bool -> Bool
flip bool = 
	if bool == True then
  	False
  else
  	True

And the use it as:

import Helpers.Bool

...

Helpers.Bool.flip True

Our client wants pixel perfect images in his WordPress site. Truth is WordPress is a bit agressive in compressing JPEGs.

WordPress default is 75% compression quality. A higher setting will generate better looking images, to the expense of larger filesize.

Add this to your functions.php file:

// Change JPEG compression rate - 85 is much more reasonable setting
// You can also disable it by settign it to 100
$jpeg_compression = function() { 
	return 85; 
};

add_filter( 'jpeg_quality', $jpeg_compression );

Have you ever wondered why the textarea field adds <br>s in your frontend HTML instead of a paragraph tag?

It turns out this is the default behaviour and it's a rather common pitfall for many WordPress newcomers.

Here's the deal:

Hit Enter twice for a paragraph p.

Hit it just once for a regular single line break <br>.

You can also disable this behaviour via an wpautop filter.

Here's another reminder why expressive, namespaced ids are important. This time is about a label's for attribute.

<input id="phone">
<label for="phone"></label

This would work just as expected unless, for example, we have a svg sprite at the beginning of the document that includes an svg with a "phone" id.

<symbol id="phone" viewBox="0 0 61.4 48">...</symbol>
...
<input id="phone">
<label for="phone"></label

In this case, the label's for will match the first in a top-down order that has the target id.

And you will never know why clicking the label won't trigger the input.

If a property changes back and forth in the same tick, it won't trigger Vue's reactivity.

Here's how to do it dirty without a watcher:

this.$set(this, 'property', false)
this.$nextTick(() => {
  this.$set(this, 'property', true)
})

Now, don't ever do this.

Example password validation regex

• rules below can be concatenated

^(?=.*?[^a-zA-ZÄÖÜäöüß0-9])(?=.*?[0-9])(?=.*?[a-zäöüß])(?=.*?[A-ZÄÖÜ])(?!.*\d{2,}).{8,}$

Special character matching

• Matches (operator is ?=) any string that has at least a special character e.g.: sadsds@asdasd

(?=.*?[^a-zA-ZÄÖÜäöüß0-9])

Number matching

• Matches (operator is ?=) any string that has at least a number: e.g.: s1adsdsasdasd

(?=.*?[0-9])

Small letter matching

• Matches (operator is ?=) any string that has at least a small letter: e.g.: SADSa

(?=.*?[a-zäöüß])

Big letter matching

• Matches (operator is ?=) any string that has at least a big letter: e.g.: SADSa

(?=.*?[A-ZÄÖÜ])

Consecutive numbers matching

• Doesn't match (operator is ?!) strings that have consecutive numbers in them: e.g.: asdasd42dada

(?!.*\d{2,})

Sequential numbers matching (cannot be used at the same time with previous rule)

• Doesn't match (operator is ?!) strings that have sequential numbers in them: e.g.: 12asdasd42dada
• It will allow numbers that are separated by other letters e.g.: adasd1asd2asd3
• It will allow consecutive numbers e.g.: ahadADS22dhsg44

(?!.*((12)|(23)|(34)|(45)|(56)|(67)|(78)|(90)|(01)))

Length of string matching (should be placed last)

• This will match any string that is less than 8 characters

.{8,}

From this

$('.multiSelectOne').multiselect({
    buttonClass: 'btn btn-default',
    buttonWidth: '100%',
    ...
});
$('.multiSelectTwo').multiselect({
    buttonClass: 'btn btn-default',
    buttonWidth: '100%',
    nonSelectedText: '---',
    ...
});

To This

<select class="js-multiselect" 
    data-include-select-all-option="true" 
    data-all-selected-text="All">
    <option></option>
</select>

$('.js-multi-select).each(function () {
	let options = {};
  
	Object.entries($(this).data())
		.map(property => options[property[0]] = property[1]);
    
  $(this).multiselect(options); 

}

And never go back for adjustments in the script file ever again.

If you work with HTTPS connections on your localhost development environment, you will often get an un-secure notification from Chrome, and this will be getting annoying.

To disable those notifications in Chrome type this in your address bar:

chrome://flags/

search for:

Allow invalid certificates for resources loaded from localhost.

and click on "Enable". Done!

As a precaution: You should use separate browsers for personal use and another for development. I do development in Chromium and my regular browsing in Safari.