js-misc

JavaScript with several miscellaneous stuff. The library provides for example:

• utilities to simplify dates usage
• utilities to work with intervals
• utilities to format and work with numbers

How to Install

The library can be used with bower, nodeJs (npm), requireJs or as individual JavaScript Import. The following paragraphs explain how to use the library in the different scenarios.

Using js-misc with bower

bower install --save js-misc

The library will be added to your bower-components. By default the js-misc.js is selected as single main file, which is the not minified version of the library (the minified/uglified version is js-misc.min.hs). If used within a browser, the different libraries are bound to the window instance as:

• window.Utility
• window.DateLibrary
• window.NumberLibrary
• window.IntervalCollection

Thus, they can be simple used by just using Utility.isEventSupported('click'); or var intervalCollection = new IntervalCollection();. Further examples on how to use the different libraries can be found here.

Using js-misc with nodeJs (npm)

To use the library within a node project, simple install it using npm:

npm install --save js-misc

The different libraries are combined in one single object, which is exported by the module, i.e., the different libraries are available like:

• .Utility
• .DateLibrary
• .NumberLibrary
• .IntervalCollection

For example:

var Misc = require('js-misc');

var Interval = Misc.IntervalCollection.Interval;
var intervalCollection = new Misc.IntervalCollection();

intervalCollection.insert(new Interval(6, 6, {id: 1}));
var overlaps = intervalCollection.overlap(new Interval(5, 8));

Further examples can be found here.

Using js-misc with requireJs

If you are building larger web-applications and you want to enjoy the advantage of requireJs, you need to include the sources (and not the optimized libraries). To do so, you may download the tarball or a zip-archive from GitHub and place it into your scripts folder. You can then require the needed library as following:

require([
    'net/meisen/general/Utility',
    'net/meisen/general/date/DateLibrary',
    'net/meisen/general/number/NumberLibrary',
    'net/meisen/general/interval/IntervalCollection',
    'net/meisen/general/interval/Interval'
], function (Utility,
             DateLibrary,
             NumberLibrary,
             IntervalCollection,
             Interval) {
    
    // do whatever needed
    
});

Using js-misc with JavaScript Import

If you simple want to use the library within your web-site, you can easily do so by downloading it, deploying it on your server and adding <script>...</script> tags:

<script src="/js/js-misc.min.js"></script>

The different libraries are bound to the window instance and thus are directly available for any other script:

<script src="/js/js-misc.min.js"></script>
<script type="text/javascript">
    var intervalCollection = new IntervalCollection();
    
    intervalCollection.insert(new Interval(6, 6, {id: 1}));
    var overlaps = intervalCollection.overlap(new Interval(5, 8));
</script>

If you'd like to have this library available through a CDN, please Star the project.

Usage Examples

Currently this library offers just a couple of functions, which I needed within my dissertation project. Nevertheless, in the future I plan to add more and more general functions, whenever I have the chance to make code available to the public and or have some time to write private code, useful code-snippets. Currently, one of the main functionalities available is the Interval stuff. Thus, I give a some examples on how to use this part of the library. Examples can be found also within the test folder, i.e., test and specs.

Note (nodeJs users only):

Using the module within nodeJs means that the libraries and data-types cannot be accessed directly (i.e., be just typing the libraries or data-types name). For the examples, I assume that the following code was used:

var Misc = require('js-misc');

var Utility = Misc.Utility;
var DateLibrary = Misc.DateLibrary;
var NumberLibrary = Misc.NumberLibrary;
var IntervalCollection = Misc.IntervalCollection;

Formatting Numbers

The NumberLibrary offers an easy way to format numbers using the symbols #, 0, ., and , as described, e.g., here.

console.log(NumberLibrary.format(3.54, '#'));
console.log(NumberLibrary.format(3.54, '00'));
console.log(NumberLibrary.format(2.657, '#000.00'));
console.log(NumberLibrary.format(15005, '###,###,###,###,##0.####'));
console.log(NumberLibrary.format(15005, '###,###,##0.00', ',', '.'));

Creates the output:

4
04
002.66
15,005
15.005,00

Handling Intervals

The IntervalLibrary offers some implementations to work with intervals, e.g., to find overlapping intervals within a collection, compare intervals within a collections, or find the position to add an interval.

// find overlapping intervals
var intervalCollection = new IntervalCollection();
intervalCollection.insert(new Interval(6, 6, {id: 1}));
intervalCollection.insert(new Interval(7, 8, {id: 2}));

var result = intervalCollection.overlap(new Interval(5, 6);
console.log('Found ' + result.length + ' overlapping intervals in collection');
if (result.length > 0) {
    console.log('The id of the first overlapping interval is: ' + result[0].get('id'));
}

// find the position to insert a value, so that the collection stays sorted
var intervalCollection = new IntervalCollection();

var list = [
    new IntervalCollection.Interval(1, 5), //  0
    new IntervalCollection.Interval(1, 6), //  1
    new IntervalCollection.Interval(1, 7), //  2
    new IntervalCollection.Interval(2, 3), //  3
    new IntervalCollection.Interval(2, 4), //  4
    new IntervalCollection.Interval(2, 4), //  5
    new IntervalCollection.Interval(2, 6), //  6
    new IntervalCollection.Interval(5, 7), //  7
    new IntervalCollection.Interval(5, 7), //  8
    new IntervalCollection.Interval(5, 8), //  9
    new IntervalCollection.Interval(6, 6)  // 10
];

intervalCollection.findPosition(list, new Interval(-2, 2)); // returns 0