Contents

subscript(_:)

Returns a column slice that includes elements that correspond to a collection of Booleans.

Declaration

subscript<C>(mask: C) -> DiscontiguousColumnSlice<WrappedElement> where C : Collection, C.Element == Bool { get }

Parameters

  • mask:

    A Boolean collection. The subscript returns a slice that includes the column elements that correspond to the true elements in mask.

Overview

You can create a Boolean column for this subscript by comparing a column to a value of the column elements’ type.

let followerColumn = artists["Followers", Int.self].filled(with: 0)
let popularArtists = artists[followerColumn > 10_000_000]