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resolve comments which is create enum for states and char types extract state machine outside function

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reniz-shah 2024-08-07 17:52:07 +05:30
parent 13d5527a5e
commit 2d5eebf842
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29
strings/string_is_valid_number.py
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@ -4,6 +4,35 @@ Topic: Deterministic Finite Automaton (DFA)
Given a string s, return whether s is a valid number or not
Leetcode link: https://leetcode.com/problems/valid-number/description/
"""
from enum import Enum
from typing import Dict
class CharType(Enum):
NUMERIC = 'NUMERIC'
SIGN = 'SIGN'
EXPONENT = 'EXPONENT'
DECIMAL = 'DECIMAL'
class State(Enum):
INITIAL = 'INITIAL'
SIGNED = 'SIGNED'
WHOLE = 'WHOLE'
FRACTIONAL = 'FRACTIONAL'
FRACTION = 'FRACTION'
EXPONENTIAL = 'EXPONENTIAL'
EXP_SIGN = 'EXP_SIGN'
EXP_NUMBER = 'EXP_NUMBER'
state_machine : Dict[State, Dict[CharType, State]] = {
State.INITIAL: {CharType.NUMERIC: State.WHOLE, CharType.SIGN: State.SIGNED, CharType.DECIMAL: State.FRACTIONAL},
State.SIGNED: {CharType.NUMERIC: State.WHOLE, CharType.DECIMAL: State.FRACTIONAL},
State.WHOLE: {CharType.NUMERIC: State.WHOLE, CharType.DECIMAL: State.FRACTION, CharType.EXPONENT: State.EXPONENTIAL},
State.FRACTIONAL: {CharType.NUMERIC: State.FRACTION},
State.FRACTION: {CharType.NUMERIC: State.FRACTION, CharType.EXPONENT: State.EXPONENTIAL},
State.EXPONENTIAL: {CharType.NUMERIC: State.EXP_NUMBER, CharType.SIGN: State.EXP_SIGN},
State.EXP_SIGN: {CharType.NUMERIC: State.EXP_NUMBER},
State.EXP_NUMBER: {CharType.NUMERIC: State.EXP_NUMBER},
}
from enum import Enum