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timediff

By Daniel · January 9, 2009

Returns a string describing the given time interval (dt) in English. For example, timediff(1000*60*60*34) will give "one day, ten hours".

/* timediff(dt)
 *
 * Returns a string describing the given time interval (dt) in English.
 * dt should be given in milliseconds.
 *
 * For example, timediff(1000*60*60*34) will give "one day, ten hours".
 */

var dt, nYrs, nDays, nHrs, nMins, nSecs, nMils,
        tYrs, tDays, tHrs, tMins, tSecs, tMils;

dt = abs(argument0);
nYrs  = dt div 31536000000;
nDays = (dt div 86400000) mod 365;
nHrs  = (dt div 3600000) mod 24;
nMins = (dt div 60000) mod 60;
nSecs = (dt div 1000) mod 60;
nMils = dt mod 1000;

tYrs  = string(nYrs)  + ' year'        + (nYrs  != 1)*'s';
tDays = string(nDays) + ' day'         + (nDays != 1)*'s';
tHrs  = string(nHrs)  + ' hour'        + (nHrs  != 1)*'s';
tMins = string(nMins) + ' minute'      + (nMins != 1)*'s';
tSecs = string(nSecs) + ' second'      + (nSecs != 1)*'s';
tMils = string(nMils) + ' millisecond' + (nMils != 1)*'s';

if (nYrs > 0)
  return (tYrs  + (nDays > 0)*(', ' + tDays));
if (nDays > 0)
  return (tDays + (nHrs  > 0)*(', ' + tHrs));
if (nHrs > 0)
  return (tHrs  + (nMins > 0)*(', ' + tMins));
if (nMins > 0)
  return (tMins + (nSecs > 0)*(', ' + tSecs));
if (nSecs > 0)
  return (tSecs + (nMils > 0)*(', ' + tMils));
return (tMils);

Categories: Data processing, String handling

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