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Strings as Primary Keys in SQL Database [closed]
I am not very familiar with databases and the theories behind how they work. Is it any slower from a performance standpoint (inserting/updating/querying) to use Strings for Primary Keys than integers?
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Why should weights of Neural Networks be initialized to random numbers? [closed]
I am trying to build a neural network from scratch.
Across all AI literature there is a consensus that weights should be initialized to random numbers in order for the network to converge faster.
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Annotating text on individual facet in ggplot2
I want to annotate some text on last facet of the plot with the following code:
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What is the session's “secret” option?
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Subqueries vs joins
I refactored a slow section of an application we inherited from another company to use an inner join instead of a subquery like:
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Throwing cats out of windows
Imagine you're in a tall building with a cat. The cat can survive a fall out of a low story window, but will die if thrown from a high floor. How can you figure out the longest drop that the cat can survive, using the least number of attempts?
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Right query to get the current number of connections in a PostgreSQL DB
Which of the following two is more accurate?
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What is the best way to get all the divisors of a number?
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Python Script execute commands in Terminal
I read this somewhere a while ago but cant seem to find it. I am trying to find a command that will execute commands in the terminal and then output the result.
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MongoDB数据导出导入工具:mongoexport,mongoimport - 大数据 & AI - 清泛...
...件导出数据。mongoexport具体用法如下所示:
[root@localhost mongodb]# ./bin/mongoexport --help
Export MongoDB data to CSV, TSV or JSON files.
options:
--help produce help message
-v [ --verbose ] be more verbose (include multiple times for more...
