JAVASCRIPT

splice and slice in javascript

// Currying :
//- Currying is an advanced technique of working with functions.
function sum(a) {
  return function (b) {
    return function (c) {
      return function (d) {
        console.log("sun is:::", a + b + c + d);
      };
    };
  };
}
sum(5)(7)(3)(20);

Slice and Splice -Javascript

function frankenSplice(arr1, arr2, n) {
  // It's alive. It's alive!
  let localArray = arr2.slice();
  for (let i = 0; i < arr1.length; i++) {
    localArray.splice(n, 0, arr1[i]);
    n++;
  }
  return localArray;
}

splice and slice in javascript

// Reduce in javascript advance
// output: { '22': 2, '24': 2, '26': 1 }
const user = [
  {name:"Abhishek",age:24},
  {name:"Dhruval",age:22},
  {name:"Anish",age:26},
  {name:"Aakash",age:22},
  {name:"Darshil",age:24},
]
const newUser = user.reduce((acc,cur)=>{
  if(acc[cur.age]){
    acc[cur.age] = acc[cur.age] +1 
  }
  else{
    acc[cur.age] = 1 
  }
  return acc;
},{})

console.log(newUser)

Slice and Splice -Javascript 2

function frankenSplice(arr1, arr2, n) {
  // It's alive. It's alive!
  let localArr = arr2.slice();
  localArr.splice(n, 0, ...arr1);
  return localArr;
}