我有一个表,其中包含一个Time存储时间戳值的列,一个存储a Name的列和一个存储a 的列Status.
我正在尝试查找一个查询来更新给定时间戳之前的所有条目,如下所示:
UPDATE `Table`
SET Status=1
WHERE Name='personname' AND 'Time'<'2012-12-23 18:00:00'
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查询有效但没有任何变化.
当试图显示WHERE零件的结果时,没有结果.
我究竟做错了什么?
我试图找到一个正则表达式,它将一个单词组合在两个相同的符号后面跟着'ter'并将它分成两个符号.示例:"Letter"一词应分为"Let"和"ter".我正在使用python,这是我到目前为止所获得的:
match = re.search(r'(\w*)((\w)\1(er$))', str)
print match.group(1) #should print 'Let'
print match.group(2) #should print 'ter'
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问题是(\ w)\ 1没有引用正确的组,因为它是组内的一个组.这是怎么解决的?
提前致谢.
我需要通过Cabal安装Yesod和dependancies,不幸的是我无法更新cabal.壳牌产量:
...$ sudo cabal install cabal-install
Resolving dependencies...
Configuring cabal-install-1.18.0.2...
/tmp/24453.c:1:12:
warning: control reaches end of non-void function [-Wreturn-type]
int foo() {}
^
1 warning generated.
Building cabal-install-1.18.0.2...
Preprocessing executable 'cabal' for cabal-install-1.18.0.2...
<command line>: cannot satisfy -package-id HTTP-4000.2.8-cdf033f9d7051824f52cd5101df67509
(use -v for more information)
Failed to install cabal-install-1.18.0.2
cabal: Error: some packages failed to install:
cabal-install-1.18.0.2 failed during the building phase. The exception was:
ExitFailure 1
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任何人都知道如何解决它?对我来说没有任何意义.
我有一个像这样的pandas dataFrame:
content
date
2013-12-18 12:30:00 1
2013-12-19 10:50:00 1
2013-12-24 11:00:00 0
2014-01-02 11:30:00 1
2014-01-03 11:50:00 0
2013-12-17 16:40:00 10
2013-12-18 10:00:00 0
2013-12-11 10:00:00 0
2013-12-18 11:45:00 0
2013-12-11 14:40:00 4
2010-05-25 13:05:00 0
2013-11-18 14:10:00 0
2013-11-27 11:50:00 3
2013-11-13 10:40:00 0
2013-11-20 10:40:00 1
2008-11-04 14:49:00 1
2013-11-18 10:05:00 0
2013-08-27 11:00:00 0
2013-09-18 16:00:00 0
2013-09-27 11:40:00 0
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日期是索引.我使用以下方法将值减少到几个月:
dataFrame = dataFrame.groupby([lambda x: x.year, lambda x: x.month]).agg([sum])
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哪个输出:
content
sum
2006 3 66
4 …Run Code Online (Sandbox Code Playgroud) 我想在使用 Redux Toolkit 时使用这样的联合类型来表示切片的状态:
type AppState = { loading: true } | { loading: false; data: number };
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似乎在减速器文件中使用 Immerjs 阻止我在两个 Union 选项之间切换,例如:
import { createSlice, PayloadAction } from "@reduxjs/toolkit";
const initialState: AppState = { loading: true };
export const sampleSlice = createSlice({
name: "sample",
initialState,
reducers: {
setup: (state) => {
return { loading: false, data: 5 };
},
},
});
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这给了我以下打字稿错误:
Type '(state: WritableDraft<{ loading: true; }>) => { loading: false; data: number; }' is not assignable to …Run Code Online (Sandbox Code Playgroud) python ×2
cabal ×1
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