10oct22ExtractNum.js

Given a random string consisting of numbers, letters, symbols, you need to sum up the numbers in the string.

Note:

    Consecutive integers should be treated as a single number. eg, 2015 should be treated as a single number 2015, NOT four numbers
    All the numbers should be treaded as positive integer. eg, 11-14 should be treated as two numbers 11 and 14. Same as 3.14, should be treated as two numbers 3 and 14
    If no number was given in the string, it should return 0

Example:

str = "In 2015, I want to know how much does iPhone 6+ cost?"

The numbers are 2015, 6

Sum is 2021.


function sumFromString(str){
//   string, has numbers
//   return sum of numbers
//   "In 2015, I want to know how much does iPhone 6+ cost?" should
//   return 2021
  //take the numbers out of string, add them
return (str.match(/\d+/g)|| []).map(Number).reduce((a,b)=> a+b, 0)
}

let sumFromString = (str) => str.split(/[^0-9]+/).reduce((a, b) => +a + +b, 0);