fnes_3_sne.js

const isAny = a => a !== undefined;
const some = map(isAny, find);

log( some(a => a > 2, [1, 2, 4, 5]) );
// true
log( some(a => a < 2, [1, 2, 4, 5]) );
// true
log( some(a => a > 10, [1, 2, 4, 5]) );
// false

const isUndefined = a => a === undefined;
const none = map(isUndefined, find);

log( none(a => a > 2, [1, 2, 4, 5]) );
// false
log( none(a => a < 2, [1, 2, 4, 5]) );
// false
log( none(a => a > 10, [1, 2, 4, 5]) );
// true

const not = a => !a;
const every = (f, coll) => isUndefined(find(map(not, f), coll));

log( every(a => a < 2, [1, 2, 4, 5]) );
// false
log( every(a => a > 10, [1, 2, 4, 5]) );
// false
log( every(a => a > 0, [1, 2, 4, 5]) );
// true