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Insert, on duplicate update in PostgreSQL?
...ing syntax (similar to MySQL)
INSERT INTO the_table (id, column_1, column_2)
VALUES (1, 'A', 'X'), (2, 'B', 'Y'), (3, 'C', 'Z')
ON CONFLICT (id) DO UPDATE
SET column_1 = excluded.column_1,
column_2 = excluded.column_2;
Searching postgresql's email group archives for "upsert" leads to...
How to instantiate a File object in JavaScript?
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211
According to the W3C File API specification, the File constructor requires 2 (or 3) parameters...
How to access and test an internal (non-exports) function in a node.js module?
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251
The rewire module is definitely the answer.
Here's my code for accessing an unexported functio...
How can I open a cmd window in a specific location?
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Why is the time complexity of both DFS and BFS O( V + E )
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273
Your sum
v1 + (incident edges) + v2 + (incident edges) + .... + vn + (incident edges)
can b...
Remove the legend on a matplotlib figure
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243
As of matplotlib v1.4.0rc4, a remove method has been added to the legend object.
Usage:
ax.g...
How to “EXPIRE” the “HSET” child key in redis?
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SuprSupr
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ASP.NET MVC 5 - Identity. How to get current ApplicationUser
...rs, but going forward the user database tables change (3 times in the past 2 years) but the API is consistent. For example the users table is now called AspNetUsers in Identity Framework, and the names of several primary key fields kept changing, so the code in several answers will no longer work as...
How to import multiple .csv files at once?
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274
Something like the following should result in each data frame as a separate element in a singl...