default
To set a simple default value, use default:
default "foo" .Bar
In the above, if .Bar evaluates to a non-empty value, it will be used. But if
it is empty, foo will be returned instead.
The definition of "empty" depends on type:
- Numeric: 0
- String: ""
- Lists:
[] - Dicts:
{} - Boolean:
false - And always
nil(aka null)
For structs, there is no definition of empty, so a struct will never return the default.
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