Function allTruthy

packages/vega-deck.gl/src/array.ts:11–13

(...args: T[][])

 * @param args array or arrays to concat into a single array.
 */
export function allTruthy<T>(...args: T[][]) {
    return args.reduce((p, c) => c ? p.concat(c) : p, []).filter(Boolean);
}

/**
 * Add an array to an existing array in place.