WDC 2.3 ES6 Data strutures

ES6 data structure

-object

{}

["key"] = test

is it data structure or inheritance?

-array

construct from "from" methid

Array.from()

push

slice

pop

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new data structure

- set

bucket of unique values

no duplicates

new Set()

.add();

.has()

.delete()

- maps (like dictionary) or relationship

new Maps)

.set(str,str)

- weakMap (map without memory leak)

similar to map

only obj that u can map

references as weakly held

e.g if using map which reference other obj. and we remove it. then there is memory leak

easy way to write not to not memory leak

-weakSet (no memory leak set)

-iterators

array.entries()

iterator.next()

for(var [index,value] of array.entries){}

keys() values() are iterators

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you can start using this by transfillers?