<pre class="shiki github-dark shaku"><code>/** * @param {Function} func * @return {Function} */function once(func) { let called = false let result return function (...args) { if (!called) { result = func.call(this, ...args) called = true } return result }}</code></pre>

simple

_.once(func) is used to force a function to be called only once, later calls only returns the result of first call. Can you implement your own once()?…