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Very large matrices using Python and NumPy
...L-like GROUP BY aggregation at 1,000,000 rows/second. Not bad for a Python-based solution!
Accessing the data as a NumPy recarray again is as simple as:
data = table[row_from:row_to]
The HDF library takes care of reading in the relevant chunks of data and converting to NumPy.
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Read binary file as string in Ruby
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You can probably encode the tar file in Base64. Base 64 will give you a pure ASCII representation of the file that you can store in a plain text file. Then you can retrieve the tar file by decoding the text back.
You do something like:
require 'base64'
file_cont...
Firebase Storage How to store and Retrieve images [closed]
How to store and view images on firebase?
6 Answers
6
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Encrypting & Decrypting a String in C# [duplicate]
...votes, I've updated it to fix silly bugs and to generally improve the code based upon comments and feedback. See the end of the post for a list of specific improvements.
As other people have said, Cryptography is not simple so it's best to avoid "rolling your own" encryption algorithm.
You can, h...
重构理论及实践——用工厂模式重构c++后台代码 - C/C++ - 清泛网 - 专注C/C...
...到本例，从可维护性的角度，消息cmd和processor factory是硬编码耦合的，当前情况下没什么问题，但脑洞开一点，业务规模增加到足够大时，框架和消息可能由两拨人来维护，此时是不是用注册回调的观察者模式，可以使业务的人...
Different floating point result with optimization enabled - compiler bug?
...finite precision, or if you were working with a device that used a decimal-based rather than binary-based floating point representation. But, you aren't. Most computers use the binary IEEE floating point standard.
As Maxim Yegorushkin already noted in his answer, part of the problem is that intern...
Missing include “bits/c++config.h” when cross compiling 64 bit program on 32 bit in Ubuntu
...it version of Ubuntu 10.10 and trying to cross compile to a 64 bit target. Based on my research, I have installed the g++-multilib package.
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Get data from file input in JQuery
I actually have a file input and I would like to retrieve the Base64 data of the file.
7 Answers
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Swift Beta performance: sorting arrays
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static const uint64_t NANOS_PER_SEC = 1000ULL * NANOS_PER_MSEC;
mach_timebase_info_data_t timebase_info;
uint64_t abs_to_nanos(uint64_t abs) {
if ( timebase_info.denom == 0 ) {
(void)mach_timebase_info(&timebase_info);
}
return abs * timebase_info.numer / timebase_info.de...
64-bit version of Boost for 64-bit windows
... for help, clarification, or responding to other answers.Making statements based on opinion; back them up with references or personal experience.To learn more, see our tips on writing great answers.
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