mathsteps-experimental-fork/dist/cjs/lib/simplifyExpression/rules/convertDecimalToFraction.js

Step by step math solutions. Experimental Fork

'use strict';

const config = require('../../config.js');
const index = require('../../node/index.js');
const ChangeTypes = require('../../types/changeType/ChangeTypes.js');

// Converts a decimal number to fraction
// e.g. 3.14 -> 314/100
function convertDecimalToFraction(node, simplifyCtx) {
  let rv = null;
  const isNumericalMode = simplifyCtx.expressionCtx
    ? simplifyCtx.expressionCtx.isNumerical()
    : false;
  if (!isNumericalMode
    && index.default.Type.isConstant(node)
    && config.default.isNumeric(node.value)
    && !config.default.isInteger(node.value)) {
    // Node is non-integer constant e.g. 3.14.
    const fractionValues = node.value.toFraction();
    const numeratorNode = index.default.Creator.constant(fractionValues[0]);
    const denominatorNode = index.default.Creator.constant(fractionValues[1]);
    const newNode = index.default.Creator.operator('/', [numeratorNode, denominatorNode]);
    rv = {
      changeType: ChangeTypes.ChangeTypes.KEMU_DECIMAL_TO_FRACTION,
      rootNode: newNode,
    };
  }
  return rv
}

module.exports = convertDecimalToFraction;