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错误:You can't specify target table 'xxx' for update in FROM clause的解决
问题: 今天在MySQL数据库删除重复数据的时候遇到了一个问题。如下脚本:DELETE FROM tempA WHERE tid IN (SELECT MAX(tid) AS tid FROM tempA GROUP BY name,age) 会出现报错信息: You can't spec...
分类:其他好文   时间:2015-11-09 17:18:37    阅读次数:275
light oj 1297 Largest Box
1297 - Largest Box PDF (English) Statistics Forum Time Limit: 2 second(s)Memory Limit: 32 MBIn the following figure you can see a rectangular card. .....
分类:其他好文   时间:2015-11-09 15:27:19    阅读次数:311
Paint House II 解答
QuestionThere are a row ofnhouses, each house can be painted with one of thekcolors. The cost of painting each house with a certain color is different...
分类:其他好文   时间:2015-11-09 07:10:41    阅读次数:288
Paint House 解答
QuestionThere are a row ofnhouses, each house can be painted with one of the three colors: red, blue or green. The cost of painting each house with a ...
分类:其他好文   时间:2015-11-09 07:05:49    阅读次数:238
[Angualr 2] Watch for changes
You can watch for form / control changes by using .valueChanges.observe({...}): this.sku.valueChanges.observer({ next: (value)=>{ ...
分类:其他好文   时间:2015-11-09 07:04:20    阅读次数:378
Time Conversion
Problem StatementYou are given time in AM/PM format. Can you convert this into a 24-hour format?InputInput consists of time in the AM/PM format i.e. h...
分类:其他好文   时间:2015-11-08 14:28:38    阅读次数:202
C++之 const
In the C, C++, and D programming languages, const is a type qualifier, a keyword applied to a data type that indicates that the data is constant (does not vary). While this can be used to declare...
分类:编程语言   时间:2015-11-07 17:44:33    阅读次数:177
Centos 用ntpdate将时间修改为北京时间
用ntpdate从时间服务器更新时间1 [root@localhost ~]# ntpdate time.nist.gov 2 7 Nov 13:49:41 ntpdate[3032]: no servers can be used, exiting3 [root@localhost ~]# nt....
分类:其他好文   时间:2015-11-07 14:46:03    阅读次数:495
swift 2.0 语法 字符串
//: Playground - noun: a place where people can playimport UIKit/*:字符串* OC中的字符串是一个对象, Swift中的字符串是一个结构体* OC中的字符串以\0结尾, Swift中的字符串不是以\0结尾* Swift中的字符串比OC...
分类:编程语言   时间:2015-11-06 20:59:30    阅读次数:293
使用centos引导内核错误:kernel: pnp 00:0b: can't evaluate _CRS: 8
CentOS系统在开机过程中,一直遇到黑屏提示:“kernel: pnp 00:0b: can't evaluate _CRS: 8”,不理会它仍能启动系统并正常工作,未知何故。经查,这是内核引导的错误,需要修改内核参数,才能避免开机出现这个错误:pnpacpi=off 禁用ACPI的即插即用功能,...
分类:其他好文   时间:2015-11-06 20:55:07    阅读次数:269
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