SOURCE

var assert = (value, text) => {
  if(value === true) {
    console.log(text)
  } else{
    console.log('error')
  }
}

// const ninjas = ['Yagyu', 'kuma', 'Hattori', 'Fuma']
// delete ninjas[1]

// assert(ninjas.length === 4, 'length still report that there are 4 items')
// console.log(ninjas)

// assert(ninjas[0] === 'Yagyu', 'first item is Yagyu')
// assert(ninjas[1] === 'undefin')

const ninjas = ['Yagyu', 'kuma', 'Hattori', 'Fuma']
var removeItems = ninjas.splice(1,1)

assert(removeItems.length === 1, "one item was resolved ")
// assert(removeItems[0] === 'kuma')
console.log(removeItems)