<pre class="shiki github-dark shaku"><code>// This is a JavaScript coding problem from BFE.dev /** * @param { (...args: any[]) =&gt; any } fn * @returns { (...args: any[]) =&gt; any } */function curry(fn) { return function curryInner(...args){ if(args.length &gt;= fn.length)return fn.apply(this,args); return curryInner.bind(this,...args); }}// function curry(fn) {// return function curryInner(...args){// if(args.length &gt;= fn.length)return fn(...args);// return (...args2)=&gt;curryInner(...args,...args2);// }// }const join = (a, b, c) =&gt; { return `${a}_${b}_${c}`}const curriedJoin = curry(join)console.log(curriedJoin(1, 2, 3))// '1_2_3'console.log(curriedJoin(1)(2, 3)) // '1_2_3'console.log(curriedJoin(1, 2)(3)) // '1_2_3'// ## 📖 Imagine You Have:// A **magic box** called `curry(fn)`.// You give this box a recipe (a function) — like a cake recipe that needs **3 things: flour, sugar, and eggs**.// Example:// ```javascript// function add(a, b, c) {// return a + b + c;// }// ```// This recipe (function) needs 3 numbers.<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// ## 📦 What The Magic Box Does:// When you give it **some of the things**, it says:// - **"Do I have everything to make the cake?"**// - If **yes**: it makes the cake and gives it to you.// - If **no**: it keeps what you gave it, and waits for you to give more things later.<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// ## 🐣 Step by Step Example // Let’s pretend:// ```javascript// function add(a, b, c) {// return a + b + c;// }// const curriedAdd = curry(add);// ```<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// Now, imagine calling:// ```javascript// curriedAdd(1)// ```// - The box looks: // 🧐 "I have **1 thing**… but I need **3**."// - So it says: // ✋ "Okay, I’ll remember this 1, and wait for more."<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// Then later:// ```javascript// curriedAdd(1)(2)// ```// - Now it has: // **1 and 2** → still not enough.// - It says: // ✋ "Okay, I’ll remember 1 and 2, and wait for one more."<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// Then:// ```javascript// curriedAdd(1)(2)(3)// ```// - Now it has: // **1, 2, 3** → just what the recipe needs!// - It makes the cake (adds them up) and gives you **6** 🎉<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// ## 🔄 How It Remembers:// Every time you give it a number:// - It makes a new tiny box with the numbers you’ve given so far inside.// - That tiny box can collect more numbers later.<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// ## 📊 In Code:// This is happening:// ```javascript// if (I have enough numbers)// run the recipe and give result// else// return a new box that remembers these numbers and can take more// ```<div class="shaku-underline shaku-underline-solid" style="left:3ch">---</div>// ## 🎨 Simple Analogy:// It’s like a bucket brigade passing water:// 1. 🪣 1 bucket → not enough // 2. 🪣🪣 2 buckets → not enough // 3. 🪣🪣🪣 3 buckets → enough! Put out the fire (call the function)</code></pre>

Implement Curry analogy for understand curry

Amazon

Flipkart

Yandex

xiaomi

Vimeo

Gojek

Currying is a useful technique used in JavaScript applications. Please implement a curry() function, which accepts a function and return a curried one…

lodash

2. implement curry() with placeholder support

1. implement curry()