Nodejs Array Max Matrix max2d( si, ei, sj, ej, calc_maxm, update_array )

Method Source Code

Array.prototype.max2d = function ( si, ei, sj, ej, calc_maxm, update_array ) {
   var maxm = 0.0;
   for ( var ip = si; ip <= ei; ip++ ) {
      for ( iq = sj; iq <= ej; iq++ ) {
         if ( calc_maxm ) {
            this[ip][iq] = calc_maxm.call(this,this[ip][iq]);
         }//from   ww w . java 2 s.c  o m
         //this[ip][iq] = Math.log10( pic[ip][iq] + 1.0 );
         if ( this[ip][iq] > maxm ) {
            maxm = this[ip][iq];
         }
      }
   }

  if ( update_array ) {
     for ( var i = si; i <= ei; i++) {
         var na = [];
         var ca = this[i];
         for (var j = sj; j <= ej; j++ ) {
            na[j] = update_array.call(this, maxm, ca[j]);
            //ca[j] / maxm;
         }
         this[i] = na;
      }
  }
   
}

Related

1. matrix(rows, cols, initial)

   Array.prototype.matrix = function (rows, cols, initial) {
       var arr = [];
       for (var i = 0; i < rows; i++) {
           var columns = [];
           for (var j = 0; j < cols; j++) {
               columns[j] = initial;
           arr[i] = columns;
       return arr;
   var matrix = [].matrix(3, 3, 10);
   console.log(matrix);
   arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
   result = arr.reduceRight(function reduce(sum, value) {
       return "" + sum + value;
   });
   console.log(result);
   

2. maxChildren(childrenPos)

   Array.prototype.maxChildren = function(childrenPos) {
     if (childrenPos.length == 1) {
       return childrenPos[0];
     if (this[childrenPos[0]] >= this[childrenPos[1]]) {
       return childrenPos[0];
     } else {
       return childrenPos[1];