methods getImag.ts

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  import { IComplex } from '../internal/complex';
import imagImpl from '../internal/imagImpl';
import mask from '../internal/mask';
 
export default function getImag (z: IComplex): number {
  if (!(z._mask & mask.HAS_IMAG)) {
    z._imag = imagImpl(z._abs, z._arg);
    z._mask |= mask.HAS_IMAG;
  }
 
  return z._imag;
}