Custom implementation of flat function in javascript
The flat() method of Array instances creates a new array with all sub-array elements concatenated into it recursively up to the specified depth.
const arr1 = [0, 1, 2, [3, 4]];
console.log(arr1.flat());
// expected output: Array [0, 1, 2, 3, 4]
Note : flattening the array can be done using inbuilt flat() , below code is a custom implementation of flat method
For more detailed understanding on inbuilt flat in javascript please click on below link
<a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat">https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/flat</a>
<pre class="shiki github-dark shaku"><code>function flat(arr, depth = 1) { let result=[] arr.forEach(item=&gt;{ Array.isArray(item) &amp;&amp; depth &gt; 0 ? result = result.concat(flat(item,depth-1)) : result.push(item) }) return result}</code></pre>

time complexity O(n)

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There is already Array.prototype.flat() in JavaScript (ES2019), which reduces the nesting of Array. Please implement your own. const arr = [1, [2], [3…

implement it by yourself

4. implement basic throttle()

2. implement curry() with placeholder support

3. implement Array.prototype.flat()