Function calcOffset

pkgs/tz/src/tzOffset/index.ts:52–61

(cacheStr: string, values: string[])

const offsetRe = /([+-]\d\d):?(\d\d)?/;

function calcOffset(cacheStr: string, values: string[]): number {
  const hours = +(values[0] || 0);
  const minutes = +(values[1] || 0);
  // Convert seconds to minutes by dividing by 60 to keep the function return in minutes.
  const seconds = +(values[2] || 0) / 60;
  return (offsetCache[cacheStr] =
    hours * 60 + minutes > 0
      ? hours * 60 + minutes + seconds
      : hours * 60 - minutes - seconds);
}