for of object looping with Object.keys(result)

sum of loops array inside array

for of is iterable for ARRAYS and Stirngs not objects
objects cannot be looped

arr1 arr2 comibining values side by side

looping 2 ways for and for of (for of not works in Internent explorer)

for of is iterable for ARRAYS and Stirngs not objects
objects cannot be looped

characters looping uppercase

array inside array looping

Reference vs value - how JS stores variables

Section 5: Map, Set, WeakMap, WeakSet and how JS stores stuff

value and reference
variable can be stored by value or by reference

All datatypes in javascript are either primitives or objects

above pic uppercase
console 2 changed but 3rd not bz value of vairlble cant change

these are primitive value GARFIELD

primitives cant changed
get set methods in map

weakmap vs map