大约有 9,000 项符合查询结果（耗时：0.0163秒） [XML]
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?
...
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.
...
Annotating text on individual facet in ggplot2
I want to annotate some text on last facet of the plot with the following code:
6 Answers
...
What is the session's “secret” option?
...
Active
Oldest
Votes
...
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:
...
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?
...
Right query to get the current number of connections in a PostgreSQL DB
Which of the following two is more accurate?
6 Answers
6
...
What is the best way to get all the divisors of a number?
...
Active
Oldest
Votes
...
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.
...
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...