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

My simple solution 0(1)

_.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()?…