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解决警告: DeprecationWarning: invalid escape sequence \D
使用正则匹配时,虽然正则没报错,但发出了一个警告: 根据这篇文章《Python正则表达式报错:invalid escape sequence '\d' (无效的转义字符'\d')》,原因是Python3将字符串解释为Unicode字符串,因为正则中的\D或者\*就被视为转义的Unicode字符,解决 ...
分类:其他好文   时间:2020-04-18 14:11:59    阅读次数:711
MySql中序列的应用和总结
Mysql中的序列主要用于主键,主键是递增的字段,不可重复。Mysql与Oracle不同的是,它不支持原生态的sequence,需要用表和函数的组合来实现类似序列的功能。###1.首先创建序列的主表/*NavicatPremiumDataTransferSourceServer:MySql_192.168.10.7SourceServerType:MySQLSourceServerVersion:
分类:数据库   时间:2020-04-18 09:20:14    阅读次数:83
迁移postgres时序列错误脚本修复
迁移postgres数据库的时候,有时候会出现序列与数据库值不匹配的现象.参考了https://stackoverflow.com/questions/244243/how-to-reset-postgres-primary-key-sequence-when-it-falls-out-of-syn ...
分类:其他好文   时间:2020-04-15 01:00:23    阅读次数:91
1140 Look-and-say Sequence
Look-and-say sequence is a sequence of integers as the following: D, D1, D111, D113, D11231, D112213111, ... where D is in [0, 9] except 1. The (n+1)s ...
分类:其他好文   时间:2020-04-15 00:24:16    阅读次数:63
orecle 自增长id
--1.创建表create table Student( ID integer not null primary key, Name varchar2(40) not null, Sex integer, Address varchar2(100)) --2.创建序列 CREATE SEQUENCE ...
分类:其他好文   时间:2020-04-14 16:47:11    阅读次数:60
HDU 1560 DNA sequence(IDA*)
DNA sequence Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 6042 Accepted Submission(s): 2735 P ...
分类:其他好文   时间:2020-04-13 10:35:32    阅读次数:80
ASN.1分析Alipay证书
2020 4 基于BouncyCastle的ASN.1分析工具设计与实现 Week2 任务步骤 下载ASN.1的查看工具Asn1View.exe 访问 "支付宝" ,获取站点证书 导出证书 ,在Asn1View.exe中打开 标识符 | 分隔符 : :|: : Integer | 0x02 | Bi ...
分类:其他好文   时间:2020-04-12 22:26:19    阅读次数:278
413. Arithmetic Slices
Problem : A sequence of number is called arithmetic if it consists of at least three elements and if the difference between any two consecutive elemen ...
分类:其他好文   时间:2020-04-12 13:58:48    阅读次数:67
leetcode 300 最长上升子序列
地址:https://leetcode cn.com/problems/longest increasing subsequence/ 大意:给定一个数组,找到最长上升子序列 ` ` ...
分类:其他好文   时间:2020-04-12 07:52:21    阅读次数:78
Problem - 997A - Codeforces
题目: You've got a string a1,a2,…,ana1,a2,…,an, consisting of zeros and ones. Let's call a sequence of consecutive elements ai,ai?+?1,…,?ajai,ai?+?1,…,? ...
分类:其他好文   时间:2020-04-11 20:50:12    阅读次数:58
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