BigNumbers about nd4js HOT 3 CLOSED

const nd = require("nd4js"),
  BigNum = require('bignumber.js');

const A = nd.tabulate([3,3], (i,j) => BigNum(11+10*i+j));
console.log('A:\n' + A);

const B = nd.array(
  [[BigNum(1), BigNum(2), BigNum(3)],
   [BigNum(4), BigNum(5), BigNum(6)],
   [BigNum(7), BigNum(8), BigNum(9)]]
);
console.log('B:\n' + B);

console.log('2*A=\n' + A.mapElems(a => a.times(2)) );

console.log('A+B=\n' + nd.zip_elems([A,B], (a,b) => a.plus(b)) );

const default_add = nd.math.add,
      default_mul = nd.math.mul;
// override addition
nd.math.add = (x,y) => {
  if( x instanceof BigNum ||
      y instanceof BigNum ) {
    if( !(x instanceof BigNum) ) x = BigNum(x);
    return x.plus(y);
  }
  else
    return default_add(x,y);
}
// override multiplication
nd.math.mul = (x,y) => {
  if( x instanceof BigNum ||
      y instanceof BigNum ) {
    if( !(x instanceof BigNum) ) x = BigNum(x);
    return x.times(y);
  }
  else
    return default_mul(x,y);
}

console.log('AB=\n' + nd.la.matmul2(A,B));