SOURCE

let arr = [1,2,3]
// console.log(arr.findIndex((item,i,arr)=>{return item == Math.max.apply(null,arr)}))

console.log(111,_.difference([1,2,3],[1,3]))

let arr2 = [{r:20,c:3},{r:1,c:6},{r:5,c:1}]

console.log(JSON.stringify(_.orderBy(arr2,'c','desc')))
console.log(JSON.stringify(arr2))

let arr3 = [{a:5,b:6},{a:5,c:6},{a:5,d:6}]
console.log(333,JSON.stringify(_.uniqBy(arr3,'a')))
let arr4 = [1,2,3]
console.log(_.uniq(arr4).length)

let arr5 = [{a:3,v:{prop:12}}]
console.log(arr5[0].a == 3 && arr5[0].v.v != null)
console.log( arr5[0].v.v)