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分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...一个很难的问题。 让我们用最经典的Use Case：“A帐号向B帐号汇钱”来说明一下，熟悉RDBMS事务的都知道从帐号A到帐号B需要6个操作：
从A帐号中把余额读出来。
对A帐号做减法操作。
把结果写回A帐号中。
从B帐号中把余额读...
How to generate a random number between a and b in Ruby?
To generate a random number between 3 and 10, for example, I use: rand(8) + 3
8 Answers
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Suppress/ print without b' prefix for bytes in Python 3
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Smart Manoj
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answered May 25 '13 at 9:14
sdaausdaau
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逆向工程——二进制炸弹(CSAPP Project) - 操作系统(内核) - 清泛网 - 专注...
...向工程——二进制炸弹(CSAPP Project)实验文件：http: files cnblogs com remlostime bomb zip题中给出了一个二进制文件（可执行文件），共6个关卡，每关要输入一个密码才能过 实验文件：bomb.zip
题中给出了一个二进制文件（可执行文...
Is the Scala 2.8 collections library a case of “the longest suicide note in history”? [closed]
I have just started to look at the Scala collections library re-implementation which is coming in the imminent 2.8 release. Those familiar with the library from 2.7 will notice that the library, from a usage perspective, has changed little. For example...
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Better way to shuffle two numpy arrays in unison
I have two numpy arrays of different shapes, but with the same length (leading dimension). I want to shuffle each of them, such that corresponding elements continue to correspond -- i.e. shuffle them in unison with respect to their leading indices.
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How to flatten nested objects with linq expression
I am trying to flatten nested objects like this:
4 Answers
4
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Default function arguments in Rust
Is it possible in Rust to create a function with a default argument?
6 Answers
6
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What exactly does git's “rebase --preserve-merges” do (and why?)
Git's documentation for the rebase command is quite brief:
2 Answers
2
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Selecting with complex criteria from pandas.DataFrame
...pd.DataFrame({'A': [randint(1, 9) for x in range(10)],
'B': [randint(1, 9)*10 for x in range(10)],
'C': [randint(1, 9)*100 for x in range(10)]})
>>> df
A B C
0 9 40 300
1 9 70 700
2 5 70 900
3 8 80 900
4 7 50 200
5 9 30 900
6 ...