问题描述:
为什么说js中Number是不可变量
这是《Javascript - The Definite Guide 6th》正文30页的原文.“ They can also be categorized as mutable and immutable types.A value of a mutable type can change.Objects and arrays are mutable:a JavaScript program can change the values of object properties and array elements.Numbers,booleans,null,and undefined are immutable—it doesn’t even make sense to talk about changing the value of a number,for example.”为什么说Number,boolean是不可变量?这里的可变与不可变是什么意思?
这是《Javascript - The Definite Guide 6th》正文30页的原文.“ They can also be categorized as mutable and immutable types.A value of a mutable type can change.Objects and arrays are mutable:a JavaScript program can change the values of object properties and array elements.Numbers,booleans,null,and undefined are immutable—it doesn’t even make sense to talk about changing the value of a number,for example.”为什么说Number,boolean是不可变量?这里的可变与不可变是什么意思?
问题解答:
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