a function that takes the string order and returns an object-CodePudding

Let's write a makeOrderList function that takes an order string and returns an object whose keys are the product names and whose values are the quantity.

in the order, the quantity always comes before the name of the product products are separated by a comma and one space if the product name consists of several words, write them in snake_case for an empty string, return an empty object

function makeOrderList(order) {}

Example:

const order = '1 coca cola, 5 chicken nuggets, 20 egg';
const list = makeOrderList(order);

/*
list === {
  coca_cola: 1,
  chicken_nuggets: 5,
  egg: 20,
}
*/

I tried to split it and join, but i recieved something strange

CodePudding user response：

You can use a regular expression like digits then spaces then anything but comma and .replace it with a callback function that populates the object:

const order = '1 coca cola, 5 chicken nuggets, 20 egg';
const result = {}

order.replace(/(\d )\s ([^,] )/g, (_, qty, name) => result[name] = Number(qty))

console.log(result)

CodePudding user response：

This can also be solved using string methods.

const order = '1 coca cola, 5 chicken nuggets, 20 egg';

const makeOrderList = (arg)=> arg.split(', ').reduce((acc, str)=>{
  const strArr = str.split(' ')
  const val = strArr.shift()
  acc[strArr.join('_')] = val
  return acc
},{})

console.log(makeOrderList(order))