| /pack-rat/003_pack_rat/pack-rat/node_modules/moment/src/lib/moment/diff.js |
|---|
| @@ -0,0 +1,62 @@ |
|---|
| import absFloor from '../utils/abs-floor'; |
| import { cloneWithOffset } from '../units/offset'; |
| import { normalizeUnits } from '../units/aliases'; |
| |
| export function diff (input, units, asFloat) { |
| var that, |
| zoneDelta, |
| delta, output; |
| |
| if (!this.isValid()) { |
| return NaN; |
| } |
| |
| that = cloneWithOffset(input, this); |
| |
| if (!that.isValid()) { |
| return NaN; |
| } |
| |
| zoneDelta = (that.utcOffset() - this.utcOffset()) * 6e4; |
| |
| units = normalizeUnits(units); |
| |
| if (units === 'year' || units === 'month' || units === 'quarter') { |
| output = monthDiff(this, that); |
| if (units === 'quarter') { |
| output = output / 3; |
| } else if (units === 'year') { |
| output = output / 12; |
| } |
| } else { |
| delta = this - that; |
| output = units === 'second' ? delta / 1e3 : // 1000 |
| units === 'minute' ? delta / 6e4 : // 1000 * 60 |
| units === 'hour' ? delta / 36e5 : // 1000 * 60 * 60 |
| units === 'day' ? (delta - zoneDelta) / 864e5 : // 1000 * 60 * 60 * 24, negate dst |
| units === 'week' ? (delta - zoneDelta) / 6048e5 : // 1000 * 60 * 60 * 24 * 7, negate dst |
| delta; |
| } |
| return asFloat ? output : absFloor(output); |
| } |
| |
| function monthDiff (a, b) { |
| // difference in months |
| var wholeMonthDiff = ((b.year() - a.year()) * 12) + (b.month() - a.month()), |
| // b is in (anchor - 1 month, anchor + 1 month) |
| anchor = a.clone().add(wholeMonthDiff, 'months'), |
| anchor2, adjust; |
| |
| if (b - anchor < 0) { |
| anchor2 = a.clone().add(wholeMonthDiff - 1, 'months'); |
| // linear across the month |
| adjust = (b - anchor) / (anchor - anchor2); |
| } else { |
| anchor2 = a.clone().add(wholeMonthDiff + 1, 'months'); |
| // linear across the month |
| adjust = (b - anchor) / (anchor2 - anchor); |
| } |
| |
| //check for negative zero, return zero if negative zero |
| return -(wholeMonthDiff + adjust) || 0; |
| } |
