TypeScript tricks

file.ts

// Source #1: http://ideasintosoftware.com/typescript-advanced-tricks/
// Source #2: https://github.com/Microsoft/TypeScript/issues/12215#issuecomment-308052919

type Diff<T extends string, U extends string> = ({[P in T]: P } & {[P in U]: never } & { [x: string]: never })[T];  
type Omit<T, K extends keyof T> = {[P in Diff<keyof T, K>]: T[P]};  

// Example: type TCleanedUser = Omit<IUser, 'privateField1' | 'privateField2'>;