mathsteps-experimental-fork/dist/es/lib/kemuEquation/solveProviders/C_EQ_C.js

Step by step math solutions. Experimental Fork

import Node from '../../node/index.js';
import stepThrough from '../../simplifyExpression/index.js';

const NODE_TRUE = Node.Creator.symbol('true');
const NODE_FALSE = Node.Creator.symbol('false');

const C_EQ_C = {
  id: 'C_EQ_C',
  pattern: 'C=C',
  solveFunction: (equation) => {
    // Simplify both side before step.
    equation.simplifyLeft();
    equation.simplifyRight();
    // Fetch LR nodes.
    const leftNode = equation.left.node;
    const rightNode = equation.right.node;
    // Try to calculate L-R difference.
    const diffNode = stepThrough.newApi(Node.Creator.operator('-', [leftNode, rightNode]));
    if (Node.Type.isConstant(diffNode)) {
      // L - R gives a constant number.
      // We can check equality directly.
      if (Node.Type.isZero(diffNode)) {
        // L - R = 0
        // Solution is true.
        equation.applySolution([NODE_TRUE]);
      }
      else {
        // L - R != 0
        // Solution is false.
        equation.applySolution([NODE_FALSE]);
      }
    }
  },
};

export { C_EQ_C };