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						- import * as C from './constant';
 - 
 - var padStart = function padStart(string, length, pad) {
 -   var s = String(string);
 -   if (!s || s.length >= length) return string;
 -   return "" + Array(length + 1 - s.length).join(pad) + string;
 - };
 - 
 - var padZoneStr = function padZoneStr(instance) {
 -   var negMinutes = -instance.utcOffset();
 -   var minutes = Math.abs(negMinutes);
 -   var hourOffset = Math.floor(minutes / 60);
 -   var minuteOffset = minutes % 60;
 -   return "" + (negMinutes <= 0 ? '+' : '-') + padStart(hourOffset, 2, '0') + ":" + padStart(minuteOffset, 2, '0');
 - };
 - 
 - var monthDiff = function monthDiff(a, b) {
 -   // function from moment.js in order to keep the same result
 -   if (a.date() < b.date()) return -monthDiff(b, a);
 -   var wholeMonthDiff = (b.year() - a.year()) * 12 + (b.month() - a.month());
 -   var anchor = a.clone().add(wholeMonthDiff, C.M);
 -   var c = b - anchor < 0;
 -   var anchor2 = a.clone().add(wholeMonthDiff + (c ? -1 : 1), C.M);
 -   return +(-(wholeMonthDiff + (b - anchor) / (c ? anchor - anchor2 : anchor2 - anchor)) || 0);
 - };
 - 
 - var absFloor = function absFloor(n) {
 -   return n < 0 ? Math.ceil(n) || 0 : Math.floor(n);
 - };
 - 
 - var prettyUnit = function prettyUnit(u) {
 -   var special = {
 -     M: C.M,
 -     y: C.Y,
 -     w: C.W,
 -     d: C.D,
 -     D: C.DATE,
 -     h: C.H,
 -     m: C.MIN,
 -     s: C.S,
 -     ms: C.MS,
 -     Q: C.Q
 -   };
 -   return special[u] || String(u || '').toLowerCase().replace(/s$/, '');
 - };
 - 
 - var isUndefined = function isUndefined(s) {
 -   return s === undefined;
 - };
 - 
 - export default {
 -   s: padStart,
 -   z: padZoneStr,
 -   m: monthDiff,
 -   a: absFloor,
 -   p: prettyUnit,
 -   u: isUndefined
 - };
 
 
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