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73 lines
2.4 KiB
73 lines
2.4 KiB
5 years ago
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## Collections
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### Instructions
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Write a bunch of function to move from one type to another
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- `arrToSet` from `Array` to `Set`
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- `arrToStr` from `Array` to `String`
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- `setToArr` from `Set` to `Array`
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- `setToStr` from `Set` to `String`
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- `strToArr` from `String` to `Array`
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- `strToSet` from `String` to `Set`
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- `mapToObj` from `Map` to `Object`
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- `objToArr` from `Object` to `Array`
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- `objToMap` from `Object` to `Map`
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- `arrToObj` from `Array` to `Object`
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- `strToObj` from `String` to `Object`
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and finally write a function `superTypeOf` that unlike `typeof` return
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a different value for advanced types like `Map` and `Set`
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### Examples
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```js
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const str = 'hello'
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const arr = [ 1, 2, 1, 3 ]
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const obj = { x: 45, y: 75, radius: 24 }
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const set = new Set()
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const map = new Map()
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set.add(1)
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set.add(2)
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set.add(1)
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set.add(3)
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map.add('a', 1)
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map.add('b', 2)
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map.add(3, 'c')
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map.add(4, 'd')
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arrToSet(arr) // -> Set { 1, 2, 3 }
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arrToStr(arr) // -> '1213'
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setToArr(set) // -> [1, 2, 3]
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setToStr(set) // -> '123'
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strToArr(str) // -> ['h', 'e', 'l', 'l', 'o']
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strToSet(str) // -> Set { 'h', 'e', 'l', 'o' }
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mapToObj(map) // -> { a: 1, b: 2, '3': 'c', '4': 'd' }
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objToArr(obj) // -> [45, 75, 24]
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objToMap(obj) // -> Map { 'x' => 45, 'y' => 75, 'radius' => 24 }
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arrToObj(arr) // -> { '0': 1, '1': 2, '3': 1, '4': 3 }
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strToObj(str) // -> { '0': 'h', '1': 'e', '2': 'l', '3': 'l', '4': 'o' }
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superTypeOf(map) // -> 'Map'
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superTypeOf(set) // -> 'Set'
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superTypeOf(obj) // -> 'Object'
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superTypeOf(str) // -> 'String'
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superTypeOf(666) // -> 'Number'
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superTypeOf(NaN) // -> 'Number'
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superTypeOf(arr) // -> 'Array'
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superTypeOf(null) // -> 'null'
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superTypeOf(undefined) // -> 'undefined'
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superTypeOf(superTypeOf) // -> 'Function'
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```
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### Notions
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- [devdocs.io/javascript/operators/typeof](https://devdocs.io/javascript/operators/typeof)
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- [devdocs.io/javascript/operators/spread_syntax](https://devdocs.io/javascript/operators/spread_syntax)
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- [devdocs.io/javascript/global_objects/map](https://devdocs.io/javascript/global_objects/map)
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- [devdocs.io/javascript/global_objects/set](https://devdocs.io/javascript/global_objects/set)
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- [devdocs.io/javascript/global_objects/object/fromentries](https://devdocs.io/javascript/global_objects/object/fromentries)
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- [devdocs.io/javascript/global_objects/object/entries](https://devdocs.io/javascript/global_objects/object/entries)
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