wherecontains() Function

Function

wherecontains( values, array )

Receives one or more values and returns an array of indexes that indicate the position of the values within the array.

See also:

• where(): Use this function to return indexes of an array that evaluate to true, instead of items that match a user-defined value.
• index(): Use this function to return the values of an array at the indexes you gathered with the wherecontains() function.

Parameters

Returns

Integer Array

Usage considerations

When to use wherecontains()

This function is useful for finding which items in a CDT array have the same value for a field.

You can then use that array of indexes as the index argument for the index() function in order to pull the values for another field in that CDT array. This will give you all the values in the second field that have a matching value in the first field. An example is displayed below.

Argument types and formatting

The arguments passed to both the values and array parameters must be of the same type. For example, you can not search through a Decimal Array with a values argument of type Integer.

You can not search through an array of groups or documents with their Integer ID values. Either cast the group/document array to an Integer, or cast the ID values to type group or document.

Matching data types

The types of values and array must be the same or Appian will return an error. For example, wherecontains(1, {1.2}) will not evaluate since values is an integer and array is a list of decimals.

Understanding results

When there is no match, the function returns an empty array.

Examples

Find index of value in list

1
wherecontains(20, {10, 20, 30})

Returns {2}.

Find index of value in list when value is not found

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wherecontains(50, {10, 20, 30})

Returns {}.

Find indexes of multiple values in list

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wherecontains({2, 1}, {1, 2, 2, 3})

Returns {1, 2, 3}. Since 2 was found twice in the list, both indexes are returned along with the index of 1. The indexes returned are in order of the values found in the array.

Find indexes of values in variant list

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wherecontains({20, "b"}, {10, 20, "b"})

Returns {2, 3}

Find indexes of complex values in list

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wherecontains(topaginginfo(1, 1), {topaginginfo(1, 1), topaginginfo(1, 2)})

Returns {1}

Find index of null values in list of text

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wherecontains(null, {"a", "", "b"})

Returns {2}. Since "" is equivalent to a null text value, the second index is returned.

Empty list of values

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wherecontains(tointeger({}), {1, 2, 3})

Returns {}.

Use with the index() function

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index(pv!employees.firstName, wherecontains("Finance", pv!employees.department))

Returns the first names of all employees with their department field set to Finance or an empty array if none have it set to Finance.

Text values are case-sensitive.

Feature compatibility

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