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Why does a base64 encoded string have an = sign at the end
...e of 3 characters number, because Base64 encoding takes each three bytes (8bits) and represents them as four printable characters in the ASCII standard.
Details :
(a) If you want to encode
ABCDEFG <=> [ABC] [DEF] [G
Base64 will deal(producing 4 characters) with the first block and the sec...
MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术
.../使选项卡的按钮在下面
if(m_tabsheet.m_hWnd)
m_tabsheet.ShowWindow(SW_MAXIMIZE);//显示选项卡
//加入标签，标签名由各个子对话框的标题栏决定
m_tabsheet.AddPage(&m_skatch);
//用Create来创建一个属性页
m_tabsheet.Create(this, WS_CHILD | WS_VISIBLE, WS_...
size_t vs. uintptr_t
...any pointer type
Not necessarily! Hark back to the days of segmented 16-bit architectures for example: an array might be limited to a single segment (so a 16-bit size_t would do) BUT you could have multiple segments (so a 32-bit intptr_t type would be needed to pick the segment as well as the off...
Difference between size_t and unsigned int?
...he size of int is specified by the data model. For example LLP64 uses a 32-bit int and ILP64 uses a 64-bit int.
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What new capabilities do user-defined literals add to C++?
...o using user-defined literals instead of a constructor call:
#include <bitset>
#include <iostream>
template<char... Bits>
struct checkbits
{
static const bool valid = false;
};
template<char High, char... Bits>
struct checkbits<High, Bits...>
{
stat...
Get Folder Size from Windows Command Line
...ze% Bytes
However, this has several problems because cmd is limited to 32-bit signed integer arithmetic. So it will get sizes above 2 GiB wrong1. Furthermore it will likely count symlinks and junctions multiple times so it's at best an upper bound, not the true size (you'll have that problem with a...
How do I use JDK 7 on Mac OSX?
...e. I hope it helps.
I Downloaded the latest OpenJDK 1.7 universal (32/64 bits) JDK
from Mac OS/X branch from http://www.oracle.com/technetwork/java/javase/downloads/jdk7-downloads-1880260.html
copied the jdk to /Library/Java/JavaVirtualMachines/ next to the
default 1.6.0 one
In Eclipse > Prefe...
How to convert an IPv4 address into a integer in C#?
...
32-bit unsigned integers are IPv4 addresses. Meanwhile, the IPAddress.Address property, while deprecated, is an Int64 that returns the unsigned 32-bit value of the IPv4 address (the catch is, it's in network byte order, so you n...
How should I validate an e-mail address?
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I'm a bit confused why you start this answer with "Don't use a reg-ex" and then proceed to provide a reg-ex.
– howettl
Aug 1 '13 at 19:21
...
How to get the list of all printers in computer
...
Try this:
foreach (string printer in System.Drawing.Printing.PrinterSettings.InstalledPrinters)
{
MessageBox.Show(printer);
}
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