Examples of AWS CLI using JQ

aws-cli-jq.sh

# jq reference: https://stedolan.github.io/jq/manual

# Get a list of each Lambda function that starts with ^test and output that as an array
# i.e. take the contents of the .Functions[] list, select the ones that have a .FunctionName property that
#      starts with test, and record the .FunctionName value
aws lambda list-functions | jq '[ .Functions[] | select(.FunctionName | test("^test")) | .FunctionName ]'

# Create an array of new maps for Lambda functions
aws lambda list-functions | jq '[ .Functions[] | select(.FunctionName | test("^test")) | {name: .FunctionName, memory: .MemorySize} ]'

# Same as above, but with the function name as the key
aws lambda list-functions | jq '[ .Functions[] | select(.FunctionName | test("^test")) | {(.FunctionName): .MemorySize} ]'

# Sort the array by memory size. group_by(.memory) will give you a list of lists grouped by the memory value
aws lambda list-functions | jq '[ .Functions[] | select(.FunctionName | test("^test")) | {name: .FunctionName, memory: .MemorySize} ] | sort_by(.memory)'

# Maybe useful? Append a suffix to a value
aws lambda list-functions | jq '.Functions[] | select(.FunctionName | test("^test")) | .FunctionName |= . + "-mysuffix" | .FunctionName'