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385. Mini Parser

题目

Given a nested list of integers represented as a string, implement a parser to deserialize it.

Each element is either an integer, or a list -- whose elements may also be integers or other lists.

Note: You may assume that the string is well-formed:

• String is non-empty.
• String does not contain white spaces.
• String contains only digits 0-9, [, - ,, ].

Example 1:

Given s = "324",

You should return a NestedInteger object which contains a single integer 324.

Example 2:

Given s = "[123,[456,[789]]]",

Return a NestedInteger object containing a nested list with 2 elements:

1. An integer containing value 123.
2. A nested list containing two elements:
    i.  An integer containing value 456.
    ii. A nested list with one element:
         a. An integer containing value 789.

题目大意

给定一个用字符串表示的整数的嵌套列表，实现一个解析它的语法分析器。列表中的每个元素只可能是整数或整数嵌套列表

提示：你可以假定这些字符串都是格式良好的：

• 字符串非空
• 字符串不包含空格
• 字符串只包含数字0-9, [, - ,, ]

解题思路

• 将一个嵌套的数据结构中的数字转换成 NestedInteger 数据结构。
• 这一题用栈一层一层的处理就行。有一些比较坑的特殊的边界数据见测试文件。这一题正确率比很多 Hard 题还要低的原因应该是没有理解好题目和边界测试数据没有考虑到。NestedInteger 这个数据结构笔者实现了一遍，见代码。

Documentation

Index

• type NestedInteger
  • func (n *NestedInteger) Add(elem NestedInteger)
  • func (n NestedInteger) GetInteger() int
  • func (n NestedInteger) GetList() []*NestedInteger
  • func (n NestedInteger) IsInteger() bool
  • func (n NestedInteger) Print()
  • func (n *NestedInteger) SetInteger(value int)

Types

type NestedInteger

type NestedInteger struct {
	Num  int
	List []*NestedInteger
}

NestedInteger define

func (*NestedInteger) Add

func (n *NestedInteger) Add(elem NestedInteger)

Add define

func (NestedInteger) GetInteger

func (n NestedInteger) GetInteger() int

GetInteger define

func (NestedInteger) GetList

func (n NestedInteger) GetList() []*NestedInteger

GetList define

func (NestedInteger) IsInteger

func (n NestedInteger) IsInteger() bool

IsInteger define

func (NestedInteger) Print

func (n NestedInteger) Print()

Print define

func (*NestedInteger) SetInteger

func (n *NestedInteger) SetInteger(value int)

SetInteger define