大约有 48,000 项符合查询结果(耗时:0.0304秒) [XML]

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How do I write a bash script to restart a process if it dies?

I have a python script that'll be checking a queue and performing an action on each item: 8 Answers ...
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How to apply a function to two columns of Pandas dataframe

Suppose I have a df which has columns of 'ID', 'col_1', 'col_2' . And I define a function : 12 Answers ...
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SQL Server : Columns to Rows

...icatorname, indicatorvalue); Finally, if you have 150 columns to unpivot and you don't want to hard-code the entire query, then you could generate the sql statement using dynamic SQL: DECLARE @colsUnpivot AS NVARCHAR(MAX), @query AS NVARCHAR(MAX) select @colsUnpivot = stuff((select ','+qu...
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How can I check if a program exists from a Bash script?

... validate that a program exists, in a way that will either return an error and exit, or continue with the script? 37 Answer...
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Environment variables for java installation

...A_TOOL_OPTIONS with value -Dfile.encoding="UTF-8". This ensures that Java (and tools such as Maven) will run with a Charset.defaultCharset() of UTF-8 (instead of the default Windows-1252). This has saved a lot of headaches when wirking with my own code and that of others, which unfortunately often a...
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PostgreSQL: Difference between text and varchar (character varying)

What's the difference between the text data type and the character varying ( varchar ) data types? 9 Answers ...
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Saving and loading objects and using pickle

I´m trying to save and load objects using pickle module. First I declare my objects: 7 Answers ...
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Determine version of Entity Framework I am using?

I believe there are two versions 1 and 2? And version 2 is referred to as Entity Framework 4.0? 10 Answers ...
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Running MSBuild fails to read SDKToolsPath

...ed to properly build my .Net 2.0 based website, when compiling with VS2008 and it's associated tools. I've recently upgraded all the project/solution files to VS2010, and now my build fails with the following error: ...
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SortedList, SortedDictionary and Dictionary

...at SortedList<TKey, TValue> SortedDictionary<TKey, TValue> and Dictionary<TKey, TValue> implement the same interfaces. ...