SOURCE

let arrayLike={
  '0':'a',
  '1':'b',
  '2':'c',
  length:3
}

var arr1=[].slice.call(arrayLike)
                       
// console.log(arr1)

let arr2=Array.from(arrayLike)
// console.log(arr2)

let namesSet=new Set(['a','n'])

// console.log(namesSet);


let name1=Array.from(namesSet);

// console.log(name1)


let spans=document.querySelectorAll('span')

let names=Array.prototype.map.call(spans,s=>s.textContent);
// console.log(names)
let name2=Array.from(spans,s=>s.textContent)

// console.log(name2)

function typeOf(){
  return Array.from(arguments,value=>typeof value)
}
// console.log( typeOf(null,NaN,1,[]))

console.log([].copyWithin.call({length:5,3:1},0,3))

console.log([1,3,5,7].find(function(value,index,arr){
  return value>3
}))

<span name="111">111</span>
<span name="222">222</span>
<span>3333</span>