cal-jalaali.js

/**
 * Print a table to show all days of a specific month.
 * 
 * Example: Farvardin, 1397
 *          printMonthMatrix(1397, 1)
 * 
 *          J     P     Ch    Se    D     Y     S
 *          --------------------------------------
 *          3     2     1                             
 *          10    9     8     7     6     5     4     
 *          17    16    15    14    13    12    11    
 *          24    23    22    21    20    19    18    
 *          31    30    29    28    27    26    25    
 * 
 * @param {number} y Year
 * @param {number} m Month
 * @returns {boolean} true if everything goes fine.
 */
function printMonthMatrix(y, m) {
  // This function can only process the 2d array returned by `monthMatrix()`
  var matrix = monthMatrix(y, m);

  // Prepeare header.
  var line = "J     P     Ch    Se    D     Y     S\n"
           + "--------------------------------------\n";

  // Walk in each row, format each element and append them to the `line`. 
  // after this, the `line` becomes a long string which holds our entire table.
  for(var i = 0; i < matrix.length; i++) {
    // select this row.
    var m = matrix[i];

    // each elements of this row represent a day.
    for(var j = 0; j < m.length; j++) {

      // hide the days from past/future month.
      if (m[j] === 0) {
        line += "      ";         // 6 space
        continue;
      }

      // we need extra padding for days between 1 to 9
      if (m[j] < 10) {
        line += m[j] + "     ";  // 5 space
        continue;
      }

      // default format for days between 10 to 31
      line += m[j] + "    ";     // 4 space
    }
    line += "\n";
  }
  log(line);
  return true;
}