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Given these two variables:

var businessUnits = ['bu1', 'bu2']
var environments = ['dev', 'prd']

I want to create new array with these values:

['bu1-dev', 'bu1-prd', 'bu2-dev', 'bu2-prd']

How to achieve this in bicep?

Given these two variables:

var businessUnits = ['bu1', 'bu2']
var environments = ['dev', 'prd']

I want to create new array with these values:

['bu1-dev', 'bu1-prd', 'bu2-dev', 'bu2-prd']

How to achieve this in bicep?

• azure
• azure-resource-manager
• azure-bicep

Share Improve this question Follow edited Mar 26 at 19:20 Thomas 30k66 gold badges9898 silver badges141141 bronze badges Recognized by Microsoft Azure Collective asked Mar 26 at 18:05 joostmnljoostmnl 1

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1 Answer 1

Sorted by: Reset to default 0

You can use lambda functions map and reduce to merge/combine arrays.

See my original answer for more details: How to loop over multiple arrays for a resource

param businessUnits array = ['bu1', 'bu2']
param environments array = ['dev', 'prd']

output buEnvs array = reduce(
  businessUnits,
  [],
  (cur, next) => concat(cur, map(environments, environment => '${next}-${environment}'))
)

As per MARCH 2025 this won't work with variables in bicep current state as variables are not typed. If you upgrade to latest bicep version (>= v0.34.1) There is an experimental feature for typed variabes.

You would need to create bicepconfig.json config file (see documentation):

{
  "experimentalFeaturesEnabled": {
    "typedVariables": true
  }
}

Then you would be able to use the same approach with variables:

var businessUnits array = ['bu1', 'bu2']
var environments array = ['dev', 'prd']

output buEnvs array = reduce(
  businessUnits,
  [],
  (cur, next) => concat(cur, map(environments, environment => '${next}-${environment}'))
)

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