<pre class="shiki github-dark shaku"><code>/** * @param {object} obj * @param {string | string[]} path * @param {any} value */function set(obj, path, value) { if (!Array.isArray(path)) { path = path.replace(/\[(\d+)\]/g, '.$1').split`.` } while (path.length &gt; 1) { const prop = path.shift() obj[prop] = obj[prop] || (/^(0|[1-9]\d*)$/.test(path[0]) ? [] : {}) obj = obj[prop] } obj[path.shift()] = value}</code></pre>

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_.set(object, path, value) is a handy method to updating an object without checking the property existence. Can you create your own set()? const obj =…