Queries and Projections | CUE

Comprehensions allow us to select and process data via queries and projections.

Queries select which data items we want to process, and projections define the shape of each resulting item.

_data: {
	foo: {a: 1, b: "a foo", c: true}
	bar: {a: 100, b: "some bar", c: false}
	baz: {a: 1000, b: "this is baz", c: false}
	quux: {a: 10000, b: "quux?", c: true}
}

result: {
	for k, v in _data
	if v.a < 10 || v.c || v.b =~ "bar" {
		(k): {
			b: v.b
			a: 1 + v.a*2
		}
	}
}

$ cue eval file.cue
result: {
    foo: {
        b: "a foo"
        a: 3
    }
    bar: {
        b: "some bar"
        a: 201
    }
    quux: {
        b: "quux?"
        a: 20001
    }
}