33 lines
738 B
JavaScript
33 lines
738 B
JavaScript
const math = require('mathjs');
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module.exports = {
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extractFromEquation: (equation)=>{
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equation = equation || '';
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const lowerCaseEquation = equation.toLowerCase();
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return math.parse(lowerCaseEquation);
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},
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extractVariableNames: (mathNode) => {
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let variableNames = new Set();
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function traverse(node) {
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if (node.type === 'SymbolNode') {
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variableNames.add(node.name);
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}
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for (const key in node.args) {
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traverse(node.args[key]);
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}
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if (node.content) {
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traverse(node.content);
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}
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}
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traverse(mathNode);
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return Array.from(variableNames);
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}
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} |