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从源代码剖析Mahout推荐引擎 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
从源代码剖析Mahout推荐引擎前言Mahout框架中cf.taste包实现了推荐算法引擎，它提供了一套完整的推荐算法工具集，同时规范了数据结构，并标准化了程序开发过程。应用推...前言
Mahout框架中cf.taste包实现了推荐算法引擎，它提供...
error C2664: “find_char”: 不能将参数 1 从“const char [14]”转换为“...
error C2664: “find_char”: 不能将参数 1 从“const char [14]”转换为“std::string &出错代码：#include <iostream>#include <string>using std::cout;using std::endl;using std::string; const引用形参举例 非const...出错代码：
#include <iostream>
#include <string>
using...
(grep) Regex to match non-ASCII characters?
...t work in a UTF8 terminal? This works for me in pry in a UTF8 terminal: 27.chr =~ /[^[:print:]]/
– akostadinov
Nov 10 '14 at 18:58
...
C++虚继承的概念 - C/C++ - 清泛网 - 专注C/C++及内核技术
C++虚继承的概念C++中虚拟继承的概念为了解决从不同途径继承来的同名的数据成员在内存中有不同的拷贝造成数据不一致问题，将共同基类设置为虚基类。这时从...C++中虚拟继承的概念
为了解决从不同途径继承来的同名的数据...
Convert integer into its character equivalent, where 0 => a, 1 => b, etc
...
Assuming you want lower case letters:
var chr = String.fromCharCode(97 + n); // where n is 0, 1, 2 ...
97 is the ASCII code for lower case 'a'. If you want uppercase letters, replace 97 with 65 (uppercase 'A'). Note that if n > 25, you will get out of the range ...
Count number of occurences for each unique value
...myData)) ) # confirm structure
Named int [1:2] 25 75
- attr(*, "names")= chr [1:2] "1" "2"
This may be useful if you need to feed the counts of unique values into another function, and is shorter and more idiomatic than the t(as.data.frame(table(dummyData))[,2] posted in a comment to Chase's ans...
error C2662: “Screen::move”: 不能将“this”指针从“const Screen”转...
error C2662: “Screen::move”: 不能将“this”指针从“const Screen”转换为“ Screen &” 转换丢失限定符出错代码： 成员函数定义Screen& Screen::move(index r,index c){ index row = r * width; cursor = row + c;...出错代码：
//成员函数定义
Screen& Scr...
Two-way encryption: I need to store passwords that can be retrieved
... $padAmount = $length;
}
return $data . str_repeat(chr($padAmount), $padAmount);
}
protected function unpad($data) {
$length = mcrypt_get_block_size($this->cipher, $this->mode);
$last = ord($data[strlen($data) - 1]);
if ($last > $leng...
How to avoid variable substitution in Oracle SQL Developer with 'trinidad & tobago'
...
My question was how this could be done without using chr(38).
– Janek Bogucki
Oct 12 '18 at 17:29
...
error C2440: “return”: 无法从“const Screen”转换为“Screen &” - C/...
error C2440: “return”: 无法从“const Screen”转换为“Screen &”转换丢失限定符。出错代码（例子来自c++ primer 4th）：Screen& Screen::display(std::ostream& os) const{ os << contents...转换丢失限定符。
出错代码（例子来自c++ primer 4th）：
Screen...