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142vip.cn
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,42 @@ | ||
| /** | ||
| * 深拷贝实现 | ||
| */ | ||
|
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| const obj = { | ||
| name: 'xxxx', | ||
| test: 'xxx', | ||
| // 浅拷贝中，这一层只能拷贝引用 | ||
| msg: { | ||
| name: 'xxx' | ||
| }, | ||
| color: ['pink', 'red'] | ||
| } | ||
|
|
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| const obj_test = { | ||
|
|
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| } | ||
|
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| // 利用函数递归来实现深拷贝 | ||
| function deepCopy(newObj, oldObj) { | ||
| for (const key in oldObj) { | ||
| // 判断我们的属性值属于那种数据类型 | ||
| const item = oldObj[key] | ||
| // 判断item是否为数组 | ||
| if (item instanceof Array) { | ||
| newObj[key] = [] | ||
| deepCopy(newObj[key], item) | ||
| // 注意 Array instanceof Object 数组是属于对象的 先过滤 | ||
| } else if (item instanceof Object) { | ||
| // 判断item是否为对象 | ||
| newObj[key] = {} | ||
| deepCopy(newObj[key], item) | ||
| } else { | ||
| // 判断是否为简单数据类型 | ||
| newObj[key] = item | ||
| } | ||
| } | ||
| } | ||
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| deepCopy(obj_test, obj) | ||
| // 输出对比 | ||
| console.log(obj_test, obj) |
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