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Modular multiplicative inverse function in Python
... is someone who has implemented some number theory capabilities in Python: http://www.math.umbc.edu/~campbell/Computers/Python/numbthy.html
Here is an example done at the prompt:
m = 1000000007
x = 1234567
y = pow(x,m-2,m)
y
989145189L
x*y
1221166008548163L
x*y % m
1L
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How to wait for async method to complete?
...ce about async void holds. Other nice explanations for why can be found at http://www.tonicodes.net/blog/why-you-should-almost-never-write-void-asynchronous-methods/ and https://jaylee.org/archive/2012/07/08/c-sharp-async-tips-and-tricks-part-2-async-void.html
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How to move columns in a MySQL table?
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Create a new object from type parameter in generic class
I'm trying to create a new object of a type parameter in my generic class.
In my class View , I have 2 lists of objects of generic type passed as type parameters, but when I try to make new TGridView() , TypeScript says:
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How to replace a hash key with another key
...as standard method for it:
hash.transform_keys{ |key| key.to_s.upcase }
http://api.rubyonrails.org/classes/Hash.html#method-i-transform_keys
UPD: ruby 2.5 method
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How do I convert between big-endian and little-endian values in C++?
How do I convert between big-endian and little-endian values in C++?
31 Answers
31
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How to get the first non-null value in Java?
Is there a Java equivalent of SQL's COALESCE function? That is, is there any way to return the first non-null value of several variables?
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OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
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2.2 easy_pool_t :内存池，和nginx的内存池实现几乎一样，见http://www.alidata.org/archives/1390 它不是一个全局的内存池，libeasy中可以有很多个，比如对于每个新的连接产生一个easy_pool_t
2.3 easy_buf_t : 用于管理连接的输入输出缓冲区
#d...
How to send a JSON object over Request with Android?
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Android doesn't have special code for sending and receiving HTTP, you can use standard Java code. I'd recommend using the Apache HTTP client, which comes with Android. Here's a snippet of code I used to send an HTTP POST.
I don't understand what sending the object in a variable named...
What is the difference between List (of T) and Collection(of T)?
I've seen them used in a lot of the same ways, and I am worried I'm about to go down a path in design that is irreversible if I don't understand this better. Also, I am using .NET.
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