MathJs

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• Source Code

MathJs is a small javascript library for performing mundane tasks repeatedly in a easy way. A few of the things that this library is capable of are operations like, rounding a decimal upto 2 decimal places, or trying to find the difference between two arrays.

Read on to find out more features about this library.

Download

You can download this library as an npm module by running the following command

npm install simplemathjs

Once downloaded, you can include in your html file like so

<script type="text/javascript" src="node_modules/dist/math.min.js"></script>

That's it, you can now use this library by referring to the MJ variable within your javascript

MJ.round(3.14159265, 2)
// 3.14

MJ.arrayDiff([1, 2, 3, 4], [1, 4, 2])
// [3]

There functionalities are segrated by primarily three sections

1. Array Functionalities
2. Numberic Functionalities
3. String Functionalities

Arrays

List of Functions that you can operate on Arrays

arrayFlatten

Given an array of arrays, it will flatten hierarchies of arrays and return a single array.

MJ.arrayFlatten([1, 2, [3, 4, [5, 6], [7]], [8, 9]])
// [1, 2, 3, 4, 5, 6, 7, 8, 9]

arrayUnique

Given a list of items in an array, it will returns an array of elements containing all the elements occurring only once, i.e. removes duplicates.

MJ.arrayUnique([1, 1, 'b', false, false, true, 'b', undefined, undefined])
// [1, "b", false, true, undefined]

arrayIntersection

Given two sets of arrays, returns the set of unique elements which are present in both

MJ.arrayIntersection([1, 2, 3, 2], [1, 5, 2, 1])
// [1, 2]

arrayDiff

Given two set of arrays, returns the set of elements present in the left, but not in the right.

MJ.arrayDiff([1, 2, 3, 4], [1, 4, 2])
// [3]
MJ.arrayDiff([1, 423, 64], [1, 64, 23, 521, 423])
// [] since there are no elements on the left which are NOT present on the right

arrayUnion

Given a set of arrays as arguments, returns a single array containing all the elements present in every argument, including duplicates.

NOTE: the arguments for the function always need to be an array

MJ.arrayUnion([1, 5, 5], [2, [2, false], 'abc'], [true, ['another', 5.15], undefined, null])
// [1, 5, 5, 2, [2, false], "abc", true, ['another', 5.15], undefined, null]
MJ.arrayUnion([1], [], [2])
// [1, 2]

arrayMean

Given an array of numbers,

MJ.arrayMean([1, 2, 3, 100, 101, 202])
// 68.16666666666667

MJ.arrayMean([false, 'abc'])
// NaN