mathjs/lib/error/DimensionError.js

Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser and offers an integrated solution to work with numbers, big numbers, complex numbers, units, and matrices.

/**
 * Create a range error with the message:
 *     'Dimension mismatch (<actual size> != <expected size>)'
 * @param {number | number[]} actual        The actual size
 * @param {number | number[]} expected      The expected size
 * @param {string} [relation='!=']          Optional relation between actual
 *                                          and expected size: '!=', '<', etc.
 * @extends RangeError
 */
function DimensionError(actual, expected, relation) {
  if (!(this instanceof DimensionError)) {
    throw new SyntaxError('Constructor must be called with the new operator');
  }

  this.actual   = actual;
  this.expected = expected;
  this.relation = relation;

  this.message = 'Dimension mismatch (' +
      (Array.isArray(actual) ? ('[' + actual.join(', ') + ']') : actual) +
      ' ' + (this.relation || '!=') + ' ' +
      (Array.isArray(expected) ? ('[' + expected.join(', ') + ']') : expected) +
      ')';

  this.stack = (new Error()).stack;
}

DimensionError.prototype = new RangeError();
DimensionError.prototype.constructor = RangeError;
DimensionError.prototype.name = 'DimensionError';

module.exports = DimensionError;