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The definition of "empty" depends on type:Numeric: 0String: ""Lists: []Dicts: {}Boolean: falseAnd always nil (aka null)

The empty function returns true if the given value is considered empty

in Go template conditionals, emptiness is calculated for you. Thus, you rarely need if empty .Foo. Instead, just use if .Foo

Continuous Integration (or CI) is a practice where you continously test an application to detect errors as soon as possible.

Docker is a container technology, many CI tools execute jobs (the tasks of a pipeline) in container to have an isolated environment.

Docker in Docker (« DinD » in short) means executing Docker in a Docker container.

the overriding effect is compounded, with later blocks taking precedence over earlier blocks.

Terraform has special handling of any configuration file whose name ends in _override.tf or _override.tf.json. This special handling also applies to a file named literally override.tf or override.tf.json.Terraform initially skips these override files when loading configuration, and then afterwards processes each one in turn (in lexicographical order).

If the original block defines a default value and an override block changes the variable's type, Terraform attempts to convert the default value to the overridden type, producing an error if this conversion is not possible.

Modern IDEs provide developers with sophisticated features like code completion, refactoring, navigating to a symbol's definition, syntax highlighting, and error and warning markers.

an IDE needs a sophisticated understanding of the programming language that the program's source is written in.

Conventional compilers or interpreters for a specific programming language are typically unable to provide these language services, because they are written with the goal of either transforming the source code into object code or immediately executing the code.