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honzabrecka/flags.ts

Created May 9, 2017 12:52
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flags.ts
enum Flags {
A = 1,
B = 2,
C = 4
}
// number means uint
const allowed = (flags: number, flag: Flags): boolean => (flags & 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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