OrDefault

Accepts 2 arguments.

Or default allows you to use another value or selector as a backup when the expected value isn't present.

Examples

Simple field selection

$ echo '{"name":"Tom","email":"[e-mail]"}' | dasel -r json 'orDefault(phone,string(N/A))'           
"N/A"

Creating a new map with defaults

$ echo '[
  {
    "name": "Tom",
    "email": "[e-mail]"
  },
  {
    "name": "Jim",
    "phone": "[phone]"
  }
]' | go run cmd/dasel/main.go -r json 'all().mapOf(name,name,email,orDefault(email,string(N/A)),phone,orDefault(phone,string(N/A)))'           
{
  "email": "[e-mail]",
  "name": "Tom",
  "phone": "N/A"
}
{
  "email": "N/A",
  "name": "Jim",
  "phone": "[phone]"
}