Sum-without-highest-and-lowest-number.js

// Sum all the numbers of a given array ( cq. list ), except the highest and the lowest element ( by value, not by index! ).

// The highest or lowest element respectively is a single element at each edge, even if there are more than one with the same value.

// Mind the input validation.

// Example

// { 6, 2, 1, 8, 10 } => 16
// { 1, 1, 11, 2, 3 } => 6
// Input validation

// If an empty value ( null, None, Nothing etc. ) is given instead of an array, or the given array is an empty list or a list with only 1 element, return 0.

function sumArray(array) {

    if (!Array.isArray(array) || array.length < 2){
      return 0
    }
    
    let newArr = array.sort((a,b)=>a-b);  
    
    newArr.shift();
    newArr.pop();
    
    return newArr.reduce((acc,c)=> acc + c , 0)
    
  }