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Insert into a MySQL table or update if exists
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Use INSERT ... ON DUPLICATE KEY UPDATE
QUERY:
INSERT INTO table (id, name, age) VALUES(1, "A", 19) ON DUPLICATE KEY UPDATE
name="A", age=19
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ASP.NET Web Site or ASP.NET Web Application?
...e solution is very fast, and you can always click on the Web Site node and select Build, if you’ve made changes.
In an MVC Web Application project you have extra commands and dialogs for common tasks, like ‘Add View’, ‘Go To View’, ‘Add Controller’, etc. These are not available in an ...
pandas: How do I split text in a column into multiple rows?
...tblocks').tolist()) #group by all but one column
['Seatblocks'] #select the column to be split
.apply(split_series,sep=' ') # split 'Seatblocks' in each group
.reset_index(drop=True,level=-1).reset_index()) #remove extra index created
print(df2)
CustNum CustomerN...
vs
...out the BOM. A free editor that can is Notepad++. On the program menu bar, select "Encoding > Encode in UTF-8 without BOM". You can also open files and re-save them in UTF-8 using "Encoding > Convert to UTF-8 without BOM".
More on the Byte Order Mark (BOM) at Wikipedia.
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What is the id( ) function used for?
I read the Python 2 docs and noticed the id() function:
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How to get unique device hardware id in Android? [duplicate]
How to get the unique device ID in Android which cannot be changed when performing a phone reset or OS update?
3 Answers
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How can I generate a unique ID in Python? [duplicate]
I need to generate a unique ID based on a random value.
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C# vs C - Big performance difference
...rdingly, it must call a CRT function that implements sqrt() and checks the selected floating point options to adjust the result. That's slow.
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Deep Learning（深度学习）学习笔记整理系列之（一） - 大数据 & AI - 清泛...
...sten Wiesel 发现了一种被称为“方向选择性细胞（Orientation Selective Cell）”的神经元细胞。当瞳孔发现了眼前的物体的边缘，而且这个边缘指向某个方向时，这种神经元细胞就会活跃。
这个发现激发了人们对于神经系统的进...
Deep Learning（深度学习）学习笔记整理系列之（一） - 大数据 & AI - 清泛...
...sten Wiesel 发现了一种被称为“方向选择性细胞（Orientation Selective Cell）”的神经元细胞。当瞳孔发现了眼前的物体的边缘，而且这个边缘指向某个方向时，这种神经元细胞就会活跃。
这个发现激发了人们对于神经系统的进...