Commit 566b387

zouxYuChengKai

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YuChengKai

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complement descriptions of deep clone

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Lines changed: 3 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -577,6 +577,7 @@ console.log(b.jobs.first) // FE`
`577`	`577`
`578`	`578`	`But this method also has its limits:`
`579`	`579`	* ignore `undefined`
	`580`	+* ignore `symbol`
`580`	`581`	`* unable to serialize function`
`581`	`582`	`* unable to resolve circular references in an object`
`582`	`583`	```js
`@@ -600,10 +601,11 @@ If an object is circularly referenced like the above example, you’ll find the`
`600`	`601`
`601`	`602`	`![](https://user-gold-cdn.xitu.io/2018/3/28/1626b1ec2d3f9e41?w=840&h=100&f=png&s=30123)`
`602`	`603`
`603`		-When dealing with functionor `undefined`, the object can also not be serialized properly.
	`604`	+When dealing with function, `undefined`or `symbol`, the object can also not be serialized properly.
`604`	`605`	```js
`605`	`606`	`let a = {`
`606`	`607`	`age: undefined,`
	`608`	`+ sex: Symbol('male'),`
`607`	`609`	`jobs: function() {},`
`608`	`610`	`name: 'yck'`
`609`	`611`	`}`

Lines changed: 3 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -615,6 +615,7 @@ console.log(b.jobs.first) // FE`
`615`	`615`	`但是该方法也是有局限性的:`
`616`	`616`
`617`	`617`	- 会忽略 `undefined`
	`618`	+- 会忽略 `symbol`
`618`	`619`	`- 不能序列化函数`
`619`	`620`	`- 不能解决循环引用的对象`
`620`	`621`
`@@ -639,11 +640,12 @@ console.log(newObj)`
`639`	`640`
`640`	`641`	`![](https://user-gold-cdn.xitu.io/2018/3/28/1626b1ec2d3f9e41?w=840&h=100&f=png&s=30123)`
`641`	`642`
`642`		-在遇到函数或者 `undefined` 的时候,该对象也不能正常的序列化
	`643`	+在遇到函数、 `undefined` 或者 `symbol` 的时候,该对象也不能正常的序列化
`643`	`644`
`644`	`645`	```js
`645`	`646`	`let a = {`
`646`	`647`	`age: undefined,`
	`648`	`+ sex: Symbol('male'),`
`647`	`649`	`jobs: function() {},`
`648`	`650`	`name: 'yck'`
`649`	`651`	`}`

Lines changed: 3 additions & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -577,6 +577,7 @@ console.log(b.jobs.first) // FE`
`577`	`577`
`578`	`578`	`But this method also has its limits:`
`579`	`579`	* ignore `undefined`
	`580`	+* ignore `symbol`
`580`	`581`	`* unable to serialize function`
`581`	`582`	`* unable to resolve circular references in an object`
`582`	`583`	```js
`@@ -600,10 +601,11 @@ If an object is circularly referenced like the above example, you’ll find the`
`600`	`601`
`601`	`602`	`![](https://user-gold-cdn.xitu.io/2018/3/28/1626b1ec2d3f9e41?w=840&h=100&f=png&s=30123)`
`602`	`603`
`603`		-When dealing with functionor `undefined`, the object can also not be serialized properly.
	`604`	+When dealing with function, `undefined`or `symbol`, the object can also not be serialized properly.
`604`	`605`	```js
`605`	`606`	`let a = {`
`606`	`607`	`age: undefined,`
	`608`	`+ sex: Symbol('male'),`
`607`	`609`	`jobs: function() {},`
`608`	`610`	`name: 'yck'`
`609`	`611`	`}`

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