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“Cloning” row or column vectors
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Here's an elegant, Pythonic way to do it:
>>> array([[1,2,3],]*3)
array([[1, 2, 3],
[1, 2, 3],
[1, 2, 3]])
>>> array([[1,2,3],]*3).transpose()
array([[1, 1, 1],
[2, 2, 2],
[3, 3, 3]])
the problem with [16] seems to be that the transpose ha...
What is stability in sorting algorithms and why is it important?
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10 Answers
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Errors: “INSERT EXEC statement cannot be nested.” and “Cannot use the ROLLBACK statement within an I
I have three stored procedures Sp1 , Sp2 and Sp3 .
12 Answers
12
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How do I get the list of keys in a Dictionary?
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313
List<string> keyList = new List<string>(this.yourDictionary.Keys);
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Can I embed a custom font in an iPhone application?
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What is this weird colon-member (“ : ”) syntax in the constructor?
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How do I know which version of Javascript I'm using?
I'm just reading this documentation about Javascript 1.2, but I'm wondering which version of Javascript is being used in the most popular browsers.
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App Inventor 2 SQLite 拓展：超流行兼容主流SQL语法的迷你本地数据库引擎...
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SQLite 拓展
1.3版本更新（2025/09/24）
1.2版本更新（2025/09/15）
中文网测试案例
打开数据库
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创建数据表
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