Sophia Jones
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Sophia Jones
```js const encode = (str) => { let hash = {} for (const s of str) { hash[s] = hash[s] + 1 || 1 } let s = '' for...
```code： function deepClone(obj, map = new WeakMap()) { if (obj === null) return obj if (obj instanceof Date) return new Date(obj) if (obj instanceof RegExp) return new RegExp(obj) if (typeof...