map.set javascript
const map = new Map([
[1970, 'bell bottoms'],
[1980, 'leg warmers'],
[1990, 'flannel'],
])
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0
map.keys() // The keys() method returns the keys
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4.43
7
map.values() // The values() method returns the values:
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3.89
9
// Map
Map.prototype.forEach((value, key, map) = () => {}
// Array
Array.prototype.forEach((item, index, array) = () => {}
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