function deepClone(obj = {}) {
if (typeof obj !== 'object' || typeof obj == null) {
return obj;
}
let result;
if (obj instanceof Array) {
result = [];
} else {
result = {};
}
for (let key in obj) {
if (obj.hasOwnProperty(key)) {
result[key] = deepClone(obj[key]);
}
}
return result
}
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