(ES6 and above and TS) Map object to array

const map = new Map();map.set('1', 'one');map.set('2'.'two');// Get the value array of the map objectArray.from(map).map(item => item[1]);// ['one', 'two']

Array.from returns a two-dimensional array after executing the map object. The elements of the array are the key-value arrays of the map, and the length is 2

Array.from(map); // [['1', 'one'], ['2', 'two']]

So if the same method can be used to obtain the key array of the map object in the following section

Array.from(map).map(item => item[0]); // ['1', '2']

Based on the values() function provided by the map object
values() returns a MapIterator object, you can call the values().next() method to get the value in turn, and you can only get it once at a time, this way you can directly get the value array of the map object

Array.from(map.values())// ['one', 'two']

The map object also provides the keys() method
The same code below can get the key array of the map object

Array.from(map.keys())// ['1', '2'] 

In addition, map objects also support the use of spread operators in arrays

More intuitive and concise expression

[...map.values()] // ['one', 'two']