# EXAMPLE - ARRAYSLICE and ARRAYMERGEELEMENTS Functions

This example illustrates how to generate an Array that is a slice of another Array, based on index numbers. The elements of this Array can then be merged into a String value.

Functions:

Item

Description

ARRAYSLICE Function

Returns an array containing a slice of the input array, as determined by starting and ending index parameters.

ARRAYMERGEELEMENTS Function

Merges the elements of an array in left to right order into a string. Values are optionally delimited by a provided delimiter.

Source:

The following set of arrays contain results, in order, of a series of races. From this list, the goal is to extract a list of the podium finishers for each race as a single string.

RaceId

RaceResults

1

["racer3","racer5","racer2","racer1","racer6"]

2

["racer6","racer4","racer2","racer1","racer3","racer5"]

3

["racer4","racer3","racer5","racer2","racer6","racer1"]

4

["racer1","racer2","racer3","racer5"]

5

["racer5","racer2","racer4","racer6","racer3"]

Transformation:

From the list of arrays, the first step is to gather the top-3 finishers from each race:

 Transformation Name New formula Single row formula ARRAYSLICE(RaceResults, 0, 3) 'arrPodium'

The above captures the first three values of the RaceResults arrays into a new set of arrays.

The next step is to merge this new set of arrays into a single string:

 Transformation Name New formula Single row formula ARRAYMERGEELEMENTS(arrPodium, ',') 'strPodium'

Results:

RaceId

RaceResults

arrPodium

strPodium

1

["racer3","racer5","racer2","racer1","racer6"]

["racer3","racer5","racer2"]

racer3,racer5,racer2

2

["racer6","racer4","racer2","racer1","racer3","racer5"]

["racer6","racer4","racer2"]

racer6,racer4,racer2

3

["racer4","racer3","racer5","racer2","racer6","racer1"]

["racer4","racer3","racer5"]

racer4,racer3,racer5

4

["racer1","racer2","racer3","racer5"]

["racer1","racer2","racer3"]

racer1,racer2,racer3

5

["racer5","racer2","racer4","racer6","racer3"]

["racer5","racer2","racer4"]

racer5,racer2,racer4