Functions.js NPM

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functions.js

functions.js is a hub of various functions or methods which act differently according to their functionality.

Please feel free to contribute, read the contributing guide.
The code is written in ES6.

Install

The project is up on npm and can be used in a project by:

npm install --save functions.js

Usage

Below is an example on how to use the library into your projects.

const func = require('functions.js');

const algo = new func.algorithms();
const mathematics = new func.mathematics();
const strings = new func.strings();

console.log(strings.camelize('john doe'));
//returns 'johnDoe'

console.log(mathematics.factorialOneLine(5));
//returns 120

console.log(algo.selectionSort([5,10,3,1]));
//returns [1,3,5,10]

Client Side

The library can be loaded as a standalone script.

<script type="text/javascript" src="https://unpkg.com/functions.js/umd/FJS.min.js"></script>
<script type="text/javascript">
	const algo = new FJS.algorithms();
	console.log(algo.nthLargest([5,6,9,8,4,2,1]));
	//=> returns 9
</script>

Methods

Method Name	Category	Description	Return Type
`anagram(str1, str2)`	string	Both strings are anagrams	boolean
`average(arr)`	math	Calculates the average of an array	number
`binarySearch(arr, elem)`	algorithm	Search an element using binary search tehcnique	number(position)
`bubbleSort(arr)`	algorithm	Sort an array using bubble sort technique	array
`camelize(str)`	string	Camelize a string i.e CamelCase	string
`catalan(number)`	math	Catalan Number	number
`changeBase(number, original, final)`	math	Convert a base of a number to any base.	number
`chunk(arr, size)`	math	Split array into chunks of smaller arrays of the desired size.	array
`clamp(number, min, max)`	math	Clamp a number.	number
`collatz(number)`	algortihm	Collatz Algorithm.	number
`combination(number,rep)`	math	Calculates simple combination.	number
`concat(...arrs)`	algorithm	Concatenates into a single array.	arr
`cosineRule(sideOne, sideTwo, theta)`	math	Cosine Rule.	number
`countPrimeFactors(n)`	math	A function to count all prime factors of a given number.	number
`countVowels(str)`	string	Count the number of vowels in a string.	number
`degToRad(deg)`	math	Convert degrees to radians.	number
`differenceBetweenDates(date1, date2)`	math	Simple division function which returns an array of quotient & remainder.	array
`digitalRoot(number)`	math	Digital Root of a number	number
`division(dividend, divisor)`	math	Simple division function which returns an array of quotient & remainder.	array
`doublefactorial(n)`	math	Print semi-factorial or double factorial of number using the iterative approach.	number
`escape(str)`	string	Escape characters from string	string
`euclideanDistance(initial, final)`	math	Calculates the distance between two points in any plane. initial takes an array of initial points & final takes an array of final points.	number
`factorialRecursive(n)`	math	Print factorial of a number using recursive function approach.	number
`factorialIterative(n)`	math	Print factorial of a number using iterative approach.	number
`factorialOneLine(n)`	math	Print factorial of a number using a ternary operator.	number
`factCountTrailingZeroes(n)`	math	Print the count of trailing zeroes in n!.	number
`fibRecursion(n)`	math	Print nth fibonacci number using recursion.	number
`fibDynamic(n)`	math	Print nth fibonacci number using dynamic programming approach.	number
`filter(arr, elem)`	string	Filter out an element from an array	array
`filterFalsy(arr)`	string	Filter out falsy values from an array	array
`fisherYates(arr)`	math	Shuffle an array using the Fisher Yates Algorithm using a while loop.	array
`fizzBuzz(n)`	algorithm	FizzBuzz Algorithm: most famous asked question.	string
`flatten(arr, givenArr)`	algorithm	Flatten/Merge two arrays.	array
`geometricVariance(probability)`	math	Calculate geometric variance.	number
`gcd(numb1, numb2)`	math	Calculate the greatest common divisor among the two numbers using Euclideans algorithm.	number
`generateHexColor()`	string	Generate random hex color.	string
`generateRGBColor()`	string	Generate random RGB color.	string
`guid(len)`	string	Generate a Global Unique Identifier	string
`hammingDistance(number1, number2)`	math	Calculate hamming distance.	number
`hasAtleastOneUpperCaseLetter(str)`	string	String has atleast one upper-cased letter.	boolean
`hasAtleastOneLowerCaseLetter(str)`	string	String has atleast one lower-cased letter.	boolean
`hexToRgb(hex)`	string	Converts hex color to RGB.	array
`humanizeNumber(num)`	string	Humanize a number.	string
`insertionSort(arr)`	algorithm	Sort an array using the insertion sort technique.	array
`integerReversal(integer)`	mathematics	Reverse an integer.	number
`isASCII(str)`	string	String contains ASCII characters	boolean
`isBool(str)`	string	String contains true or false	boolean
`isDataURI(str)`	string	String is a data uri format.	boolean
`isDivisible(dividend, divisor)`	math	Check if the first number is divisible by second one.	boolean
`isEmoji(str)`	string	String is an emoji.	boolean
`isEmpty(str)`	string	String is empty.	boolean
`isEndWith(str, target)`	string	String ends with target.	boolean
`isEquals(str, elem)`	string	Compares the two strings entered.	boolean
`isEven(number)`	math	True if a number is even, false otherwise.	boolean
`isFunction(val)`	string	Value is a function.	boolean
`isHexaDecimal(str)`	string	String is hexadecimal.	boolean
`isHexColor(str)`	string	String is a hex color.	boolean
`isIPAddress(str)`	string	String is an IP address.	boolean
`isJSON(str)`	string	String is a JSON object.	boolean
`isLowerCase(str)`	string	String is all lower-cased.	boolean
`isMACAddress(str)`	string	String is a MAC Address.	boolean
`isMD5(str)`	string	String is a a MD5 type.	boolean
`initials(str)`	string	Get the initials of a persons name.	string
`isOdd(number)`	math	True if a number is odd, false otherwise.	boolean
`ISO8601WeekNumber(dateObj)`	string	Get ISO-8601 week number of a year.	number
`isPalindrome(str)`	string	String is a palindrome.	boolean
`isPrime(number)`	string	Number is a prime.	boolean
`isUpperCase(str)`	string	String is all upper-cased.	boolean
`isValidEmail(str)`	string	String is a valid email id.	boolean
`kebabCase(str)`	string	to Kebab Case.	string
`lcm(arr)`	math	Calculate LCM of an array of numbers	number
`leibniz(limit)`	math	Predict the value of PI	number
`linearSearch(arr, elem)`	algorithm	Search an element using linear search technique	number(position)
`lineFromPoints(initial, final)`	math	Create a line from x1, y1 & x2, y2 in XY plane.	string
`maxOrMin(arr, task)`	math	Get maximum or minimum of an array	number
`median(arr)`	math	Calculate median of a sorted number array	number
`modularExponential(base, power, mod)`	algorithm	Modular Exponential Algorithm	number
`nthRoot(number, n)`	math	Calculates the nth root of a positive number	number
`nthSGonalNumber(sides, number)`	math	Calculates the nth s-gonal number of 'sides' polygon	number
`nthLargest(arr, nth)`	algorithm	Find the nth largest number from an unsorted array	number
`permutation(num,rep)`	math	Calculates simple permutation.	number
`pythagorasDistance(arg1, arg2)`	math	Calculate the pythogorean distance if arg1 and arg2 are 2 sides of a right-angled triangle.	number
`radToDeg(rad)`	math	Convert radians to degrees	number
`remove(arr)`	algorithm	Remove an element from an array	arr
`removeDuplicate(arr)`	algorithm	Remove duplicates from an array	arr
`removeTags(str)`	string	Remove tags from an HTML statement	string
`reverse(arr)`	algorithm	Reverse an array	arr
`reverseInPlace(str)`	string	Reverse words of a sentence in place	string
`rgbToHex(red,green,blue)`	string	RGB to Hex format	string
`romanize(num)`	string	Romanize a number	string
`round(number)`	math	Round a number to two places	number
`secureEmail(str)`	string	Secures your email using asterisks	string
`securePassword(str)`	string	Secure password using astrisks	string
`segregate(arr)`	algorithm	Segregate 0's and 1's in an array	array
`selectionSort(arr)`	algorithm	Sort an array using the selection sort technique	arr
`sigmoid(number)`	math	Sigmoid Function	number
`sineRule(sideOne, angleOne, angleTwo)`	math	Sine Rule using two angles & one side	number
`slopeOfALine(arg)`	math	Calculates the slope of a line using points and angle of inclination. arg takes angle of inclination or an array of initial points and final points. Example arg = 60 degrees or x0,y0,x1,y1	number
`snakeCase(str)`	string	to Snake Case	string
`sortChar(str)`	string	Sort string characters in alphabetical order	string
`splitName(str)`	string	Return the first name and the last name of a person's name.	array
`stringHammingDistance(str1, str2)`	string	String Hamming Distance	number
`subtract(firstNum, secondNum)`	math	Subtract a number from another	number
`sumOfArray(arr)`	math	Addition of all the integers in an array	number
`thousandSeperator(num)`	string	Seperate thousands using commas	number
`toFloat(str)`	string	Parse string to float value	number
`toInt(str)`	string	Parse string to integer value	number
`toTitleCase(str)`	string	Convert string to titleCase	string
`truncate(str,pos)`	string	Truncate a string at provided position	string
`trailingAndLeading(arr)`	string	Remove leading and trailing zeroes from an array	array
`unescape(str)`	string	Unescape the string.	string
`uuid()`	string	Generate a UUID i.e universally unique identifier.	number
`zeroFill(number, len)`	string	Zerofill a number to the given length.	number

Documentation

You can find the documentation of the package over here

Test

Run the following command:

npm run test

About

The project is a continuation to a package previously owned by me named okay-string. I thought of renaming it to functions & learn more by actually practicing functions. That's how functions.js was created.😍

FAQ🙋

Here are some solutions to frequently asked questions:

Q. How to use ?

Take a look over here.

Q. Another lodash or underscore ?

These two libraries are industry standards & are widely used. They have a ton of great, useful functions to use in a project. There is a difference. functions.js was created to learn predefined methods and make something out of it by creating a new method. So i think there is no comparison between this & the other two libraries.