Array
Arrays are one of the mostly used data structures in JavaScript. utilict supports arrays of numbers, strings, binary variables and objects. Following operations are supported on array data type.
Minimum Array
Returns the k’th minimum element in the array. k is the 1-indexed variable with the default value as 1.
Usage
minArray([1, 3, 2, 6, 5, 8, 7, 0, 3]); // Returns 0
minArray([32, 67, 98, 23, 54, 61, 29, 74], 4); // Returns 54Arguments
list: Arary of numbers.k(optional): The minimum index, default value is1.
Returns
Returns k’th minimum element in the array.
Maximum Array
Returns the k’th maximum element in the array. k is the 1-indexed variable with the default value as 1.
Usage
maxArray([1, 3, 2, 6, 5, 8, 7, 0, 3]); // Returns 8
maxArray([32, 67, 98, 23, 54, 61, 29, 74], 4); // Returns 61Arguments
list: Arary of numbers.k(optional): The maximum index, default value is1.
Returns
Returns k’th maximum element in the array.
Array Product
Returns the product of all the numbers in the array.
Usage
arrayProduct([2, 3, 6, 34, 90, 1]); // Returns 110160
arrayProduct([90, 87, 0, -34, -900, -1245]); // Returns 0Returns
Returns the product of all the numbers in the array.
Mean
Returns the mean of the given array. utilict supports 4 types of mean, arithmetic, geometric, harmonic, rms. The default value is arithmetic.
Usage
mean([3, 5, 9, 5, 7, 2]); // Performs arithmetic mean, returns 5.17
mean([4, 10, 16, 24], "geometric"); // Returns 11.13
mean([10, 2, 4, 7], "harmonic"); // Returns 4.03
mean([2, 3, 5, 7, 11], "rms"); // Returns 6.45Arguments
list: Arary of numbers.type(optional): Mean type, supported types arearithmetic,geometric,harmonic,rms, Default type isarithmetic.
Returns
Returns the mean of the list.
Median
Returns the median of the given array. Median is the middle number in the sorted array. Sorting is performed internally by the utilict.
Usage
median([142, 140, 130, 150, 160, 135, 158, 132]); // Returns 141
median([4, 12, 14, 17, 22, 23, 23, 24, 25, 29, 40, 67, 77, 82, 92]); // Returns 24Returns
Returns the median of the list.
Mode
Returns the mode of the given list. Mode is the value that appears most frequently within that list. If multiple numbers have the same highest frequency, it will return an array of mode values.
Usage
mode([3, 3, 6, 9, 16, 16, 16, 27, 27, 37, 48]); // Returns 16
mode([3, 3, 3, 9, 16, 16, 16, 27, 37, 48]); // Returns [3, 16]Returns
Returns the mode of the list.
Root Mean Square
Calculates the RMS (Root Mean Square) of the list. RMS is the square root of the mean square.
Usage
rootMeanSquare([1, 2, 3, 4, 5]); // Returns 3.32
rootMeanSquare([4, 6, 8, 10]); // Returns 7.35Returns
Returns the Root Mean Square (RMS) of the list.
Variance
Variance is a measure of the spread of data within the list.
Usage
variance([46, 69, 32, 60, 52, 41]); // Returns 177.2
variance([4, 2, 5, 8, 6]); // Returns 5Returns
Returns the variance of the list.
Standard Deviation
Standard Deviation is the square root of variance.
Usage
standardDeviation([46, 69, 32, 60, 52, 41]); // Returns 13.31
standardDeviation([4, 2, 5, 8, 6]); // Returns 2.24Returns
Returns the standard deviation of the list.
Remove Duplicates
Removes duplicates from the list and return the same list.
Usage
removeDuplicates([1, 2, 3, 3, 2, 1, 4, 5, 1, 5, 8, 3]); // Returns [1, 2, 3, 4, 5, 8]
removeDuplicates([52, 56, 41, 98, 52, 41, 109, 254]); // Returns [52, 56, 41, 98, 109, 254]Returns
Same list with duplicates removed
Histogram
Returns the histogram map for each item occurrence in a given list.
Usage
histogram([3, 3, 3, 9, 16, 16, 16, 27, 37, 48]); // Returns {"3": 3, "9": 1, "16": 3, "27": 1, "37": 1, "48": 1}Returns
Histogram map for a given list.
Greatest Common Divisor (GCD)
Returns the Greatest Common Divisor (GCD) of the list.
Usage
gcd([8, 12, 16]); // Returns 4
gcd([13, 17, 48, 91]); // Returns 1
gcd([]); // Returns 0Returns
Returns Greatest Common Divisor (GCD) of the list.
Least Common Multiple (LCM)
Returns the Least Common Multiple (LCM) of the list.
Usage
lcm([12, 18, 24]); // Returns 72
lcm([10, 12, 15, 75]); // Returns 300
lcm([]); // Returns 0Returns
Returns Least Common Multiple (LCM) of the list.