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source of historical stock data [closed]
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they have a ActiveX API which you can call with c++ code or C# or whatever in windows to get to your data.
– lukebuehler
Jun 23 '13 at 17:05
1
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STL中map容器使用自定义key类型报错详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...用自定义key类型报错详解引言STL的map容器中，key的类型是不是随意的呢？实践编写测试代码定义一个结构体来试试：[cpp]view plaincopystructa{char*pName;intm_a;} 引言
STL的map容器中，key的类型是不是随意的呢？
实践
编写测试代码
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Most efficient way to remove special characters from string
...ogram() {
_lookup = new bool[65536];
for (char c = '0'; c <= '9'; c++) _lookup[c] = true;
for (char c = 'A'; c <= 'Z'; c++) _lookup[c] = true;
for (char c = 'a'; c <= 'z'; c++) _lookup[c] = true;
_lookup['.'] = true;
_lookup['_'] = true;
}
public static string RemoveSpeci...
Is Java really slow?
...re memory access, and some operations are more complex than with ASCII (C, C++). At the time, it was the right decision for portability, but it carries a small performance cost. UTF-8 looks like a better choice now.
Array access is a bit slower compared to C, due to bounds checks. The penalty used t...
Order of member constructor and destructor calls
Oh C++ gurus, I seek thy wisdom. Speak standardese to me and tell my if C++ guarantees that the following program:
4 Answer...
SQLite with encryption/password protection
...know of:
SEE - The official implementation.
wxSQLite - A wxWidgets style C++ wrapper that also implements SQLite's encryption.
SQLCipher - Uses openSSL's libcrypto to implement.
SQLiteCrypt - Custom implementation, modified API.
botansqlite3 - botansqlite3 is an encryption codec for SQLite3 that c...
msvcr110d.dll!_CrtIsValidHeapPointer(const void * pUserData) 行 2036 ...
...，也就不会出现问题了。
可能原因2：delete释放了常字符串。如 char *p = "abc"; delete p;
可能原因3：
CString m_strTest;
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GetPrivateProfileString(INI_SECTION, "test", "", m_strTest.GetBuffer(), MAX_PATH, INI_FILE);
以上代码对话框资源释放的时...
Creating an R dataframe row-by-row
...s on in the meantime puts you square into lighthouse territory.
In the C++ STL, push_back() is a way of life. It doesn't try to be functional, but it does try to accommodate common programming idioms efficiently.
With some cleverness behind the scenes, you can sometimes arrange to have one ...
Can “this” ever be null in Java?
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I don't know deeply about Java, but in C++ the this of an instance method could be NULL. So I am not quite convinced this is a sufficient reason in Java.
– kennytm
Sep 24 '10 at 17:32
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VC DDE（Dynamic Data Exchange）与EXCEL连接 - C/C++ - 清泛网 - 专注C/C++及内核技术
...平台，有技术平台，一切目标为了高效的做好产品。
该C++控制台程序案例如下：
// smdata.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include "windows.h"
#include <string.h>
#include "ddeml.h"
#include "stdio.h"
HDDEDATA ...