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alcedoatthis/flags.ts

Forked from honzabrecka/flags.ts
Last active May 10, 2017 10:06
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flags.ts
enum Flags {
A = 1 << 0,
B = 1 << 1,
C = 1 << 2,
}
// number means uint
const allowed = (flags: Flags[], flag: Flags): boolean =>
(flags.reduce((p, c) => p | c) & flag) === flag
const allowedFlags = [Flags.B | Flags.C]
console.log(allowed(allowedFlags, Flags.A))// -> false
console.log(allowed(allowedFlags, Flags.B))// -> true
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