, )

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The arraycommonprefix( function finds the common prefix (if any) of all items in an array.

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Parameters

This function has two parameters:

text – the array to be examined.

separator – the separator character for this array.

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Description

This function returns the longest common prefix (if any) of all items in an array.

arraycommonprefix("San Francisco,San Jose,Santa Paula",",") ☞ San

One handy use for this function is to find the highest non-empty folder in an array returned by the filecatalog( function.

let catalog = filecatalog(somePath)
let nonEmptyFolder = arraycommonprefix(catalog,cr())

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See Also

• filecatalog( -- builds a text array listing the files in a folder, including any subfolders of that folder.
• Text Arrays -- A numbered collection of text values.

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History

Version	Status	Notes
10.1	New	New in this version.