14. Mai 2017

Client-side JavaScript PDF generation with jsPDF

A library to generate PDFs in client-side JavaScript.

// Default export is a4 paper, portrait, using milimeters for units
var doc = new jsPDF()

doc.text('Hello world!', 10, 10)
doc.save('a4.pdf')

// Landscape export, 2×4 inches
var doc = new jsPDF({
  orientation: 'landscape',
  unit: 'in',
  format: [4, 2]
})

doc.text('Hello world!', 1, 1)
doc.save('two-by-four.pdf')

// Default export is a4 paper, portrait, using milimeters for units

var doc = new jsPDF()

doc.text('Hello world!', 10, 10)

doc.save('a4.pdf')

// Landscape export, 2×4 inches

var doc = new jsPDF({

orientation: 'landscape',

unit: 'in',

format: [4, 2]

})

doc.text('Hello world!', 1, 1)

doc.save('two-by-four.pdf')

GitHub

14. Mai 2017

A simple javascript database – TaffyDB

Small file size, extremely fast queries
Powerful JavaScript centric data selection engine
Database inspired features such as count, update, and insert
Robust cross browser support
Easily extended with your own functions
Compatible with any DOM library (jQuery, YUI, Dojo, etc)
Compatible with Server Side JS

// Create DB and fill it with records
var friends = TAFFY([
	{"id":1,"gender":"M","first":"John","last":"Smith","city":"Seattle, WA","status":"Active"},
	{"id":2,"gender":"F","first":"Kelly","last":"Ruth","city":"Dallas, TX","status":"Active"},
	{"id":3,"gender":"M","first":"Jeff","last":"Stevenson","city":"Washington, D.C.","status":"Active"},
	{"id":4,"gender":"F","first":"Jennifer","last":"Gill","city":"Seattle, WA","status":"Active"}	
]);

// Create DB and fill it with records

var friends = TAFFY([

{"id":1,"gender":"M","first":"John","last":"Smith","city":"Seattle, WA","status":"Active"},

{"id":2,"gender":"F","first":"Kelly","last":"Ruth","city":"Dallas, TX","status":"Active"},

{"id":3,"gender":"M","first":"Jeff","last":"Stevenson","city":"Washington, D.C.","status":"Active"},

{"id":4,"gender":"F","first":"Jennifer","last":"Gill","city":"Seattle, WA","status":"Active"}

]);

// Kelly's record
var kelly = friends({id:2}).first();

// Kelly's last name
var kellyslastname = kelly.last;

// Get an array of record ids
var cities = friends().select("id");

// Get an array of distinct cities
var cities = friends().distinct("city");

// Apply a function to all the male friends
friends({gender:"M"}).each(function (r) {
   alert(r.name + "!");
});

// Kelly's record

var kelly = friends({id:2}).first();

// Kelly's last name

var kellyslastname = kelly.last;

// Get an array of record ids

var cities = friends().select("id");

// Get an array of distinct cities

var cities = friends().distinct("city");

// Apply a function to all the male friends

friends({gender:"M"}).each(function (r) {

alert(r.name + "!");

});

TaffyDB / GitHub

6. Mai 2017

Icons in pure css – CSS Icon

Icon set made with pure css code, no dependencies.

Github

5. April 2017

Browse tree-like data in columns, similar to OS X’s file manager – FinderJS

Data source: Array or Function (useful for asynchronous operations, e.g. calling an API).
Styling: Use any CSS/framework of choice (Flexbox). You can also define how items are rendered and change default classnames.
Keyboard navigation: use arrows keys to navigate.
Events: several events are emitted to allow for custom behavior.
Module formats: Provided as an npm module (CommonJS), a jQuery plugin, and exported as the global finder.

FinderJS

31. März 2017

Javascript Life Saver of the Week – uniqueID

Simple way to make sure you are assigning unique IDs to a series of elements.

var seedNum = 1;
function uniqueID(myKey, seedNum){
     var key = myKey + seedNum;
     if (document.getElementById(key) != null){
         return uniqueID(myKey, ++seedNum);
     }
     else{
         return key;
     }
 }

var seedNum = 1;

function uniqueID(myKey, seedNum){

var key = myKey + seedNum;

if (document.getElementById(key) != null){

return uniqueID(myKey, ++seedNum);

}

else{

return key;

}

USAGE

uniqueID('state-',seedNum);

1	uniqueID('state-',seedNum);

If you want to do IETF RFC-4122 compliant Universally Unique Identifiers (UUID), checkout Pure UUID.

Seems to be all about unique IDs this week ;)

Enjoy coding…

31. März 2017

PHP Life Saver of the Week – preg_replace_callback

I am currently building a custom slides / template builder for a project, with a lot of moving parts and dynamic logic.

As there are repeating patterns within the slides, each pattern and its logic needs to be neatly separated. As the slides can be reordered and dropzones can be changed, I need to make sure logic doesn’t break and IDs get updated.

Before reassembling all templates, I am making sure that IDs match the slide and dropzone using a preg_replace_callback

One of the patterns is a simple tab setup, each has its unique ID defined like vl-tab_U1_S1_D1.

The function below passes the found matches through to the anonymous callback function in preg_replace_callback and offers outside data to the function using use($foo). The $dropzone object holds the current unit, slide and dropzone of the pattern, which can be used to replace the current ID with the correct one.

$dropzone->region_content = preg_replace_callback('/vl-tab_[^"]++/',function($hit) use($dropzone){
	$oldID = explode("_",$hit[0]);
	$newID = array(
		"vl-tab", 
		"U".$oldID[1], 
		"S".$dropzone->slide,
		"D".$dropzone->dropzone
	);	
	return implode("_", $newID);
							
},$dropzone->region_content);

$dropzone->region_content = preg_replace_callback('/vl-tab_[^"]++/',function($hit) use($dropzone){

$oldID = explode("_",$hit[0]);

$newID = array(

"vl-tab",

"U".$oldID[1],

"S".$dropzone->slide,

"D".$dropzone->dropzone

);

return implode("_", $newID);

},$dropzone->region_content);

Really nice combo to make magic happen ;)

BTW here a nice website to testdrive and tweak your Regex : https://regex101.com/

Enjoy coding …

29. März 2017

Smart CSS viewer for Chrome – CSS Peeper

Inspect styles in a simple, well-organized & beautiful way with this Chrome extension. You can select any object to get more specific information about them. Also a nice way to browse color palettes of websites you visit.

CSSPeeper

24. März 2017

Datamuse … a word-finding query engine for developers

„The Datamuse API is a word-finding query engine for developers. You can use it in your apps to find words that match a given set of constraints and that are likely in a given context. You can specify a wide variety of constraints on meaning, spelling, sound, and vocabulary in your queries, in any combination.“

words with a meaning similar to ringing in the ears
/words?ml=ringing+in+the+ears

Datamuse API