Add-FnSelect

Add-FnSelect

SYNOPSIS

Adds the intrinsic function “Fn::Select” to a resource property

SYNTAX

Add-FnSelect [[-Index] <Object>] [-ListOfObjects] <Object> [<CommonParameters>]

DESCRIPTION

The intrinsic function Fn::Select returns a single object from a list of objects by index.

You can use Fn::Select to select an object from a CommaDelimitedList parameter. You might use a CommaDelimitedList parameter to combine the values of related parameters, which reduces the total number of parameters in your template.

** Important **
    Fn::Select does not check for null values or if the index is out of bounds of the array. Both conditions will result in a stack error, so you should be certain that the index you choose is valid, and that the list contains non-null values.

PARAMETERS

-Index

The index of the object to retrieve. This must be a value from zero to N-1, where N represents the number of elements in the array.

Type: Object
Parameter Sets: (All)
Aliases:

Required: False
Position: 1
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

-ListOfObjects

The list of objects to select from. This list must not be null, nor can it have null entries.

Type: Object
Parameter Sets: (All)
Aliases:

Required: True
Position: 2
Default value: None
Accept pipeline input: False
Accept wildcard characters: False

CommonParameters

This cmdlet supports the common parameters: -Debug, -ErrorAction, -ErrorVariable, -InformationAction, -InformationVariable, -OutVariable, -OutBuffer, -PipelineVariable, -Verbose, -WarningAction, and -WarningVariable. For more information, see about_CommonParameters (http://go.microsoft.com/fwlink/?LinkID=113216).

INPUTS

OUTPUTS

Vaporshell.Function.Select

NOTES

For the Fn::Select index value, you can use the Ref and Fn::FindInMap functions.

For the Fn::Select list of objects, you can use the following functions: Fn::FindInMap Fn::GetAtt Fn::GetAZs Fn::If Fn::Split Ref

http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-select.html