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Targeting both 32bit and 64bit with Visual Studio in same solution/project
... as it pulls off the basic trick involved (create a common MSI, as well as 32-bit and 64-bit specific MSIs, and use an .EXE setup launcher to extract the right version and do the required fixups at runtime) very, very well.
You can probably achieve the same results using other tools or the Window...
Why do x86-64 instructions on 32-bit registers zero the upper part of the full 64-bit register?
...feated if it wasn't done that way.
This way you can write fast code using 32-bit values in 64-bit mode without having to explicitly break dependencies all the time. Without this behaviour, every single 32-bit instruction in 64-bit mode would have to wait on something that happened before, even thou...
Why is Java's boolean primitive size not defined?
...
Short answer: yes, boolean values are manipulated as 32-bit entities, but arrays of booleans use 1 byte per element.
Longer answer: the JVM uses a 32-bit stack cell, used to hold local variables, method arguments, and expression values. Primitives that are smaller than 1 cell ...
How does Python manage int and long?
...the maximum size in bytes a Python int can be.
This will be gigabytes in 32 bits, and exabytes in 64 bits.
Such a large int would have a value similar to 8 to the power of sys.maxsize.
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i...
SQLite UPSERT / UPDATE OR INSERT
...ostgreSQL syntax.
INSERT INTO players (user_name, age)
VALUES('steven', 32)
ON CONFLICT(user_name)
DO UPDATE SET age=excluded.age;
Note: For those having to use a version of SQLite earlier than 3.24.0, please reference this answer below (posted by me, @MarqueIV).
However if you do...
Trying to login to RDP using AS3
... dataBuffer.writeUnsignedInt(0x61637544);
//dataBuffer.setLittleEndian32(0x61637544); // "Duca" ?!
be.writeShort((length - 14) | 0x8000); // remaining length
dataBuffer.writeBytes(be);
be.clear();
dataBuffer.writeShort(SEC_TAG_CLI_INFO);
dataBuffer.writeShort(212); // length...
How do I convert between big-endian and little-endian values in C++?
...bit numbers:
unsigned short _byteswap_ushort(unsigned short value);
For 32 bit numbers:
unsigned long _byteswap_ulong(unsigned long value);
For 64 bit numbers:
unsigned __int64 _byteswap_uint64(unsigned __int64 value);
8 bit numbers (chars) don't need to be converted.
Also these are only d...
How to use hex color values
...ers.count) != 6) {
return UIColor.gray
}
var rgbValue:UInt32 = 0
Scanner(string: cString).scanHexInt32(&rgbValue)
return UIColor(
red: CGFloat((rgbValue & 0xFF0000) >> 16) / 255.0,
green: CGFloat((rgbValue & 0x00FF00) >> 8) / 255.0,
...
Efficient Algorithm for Bit Reversal (from MSB->LSB to LSB->MSB) in C
...e (just don't look at me when they're not as fast :)
Options
Low Memory (32-bit int, 32-bit machine)(from here):
unsigned int
reverse(register unsigned int x)
{
x = (((x & 0xaaaaaaaa) >> 1) | ((x & 0x55555555) << 1));
x = (((x & 0xcccccccc) >> 2) | ((x & ...
Why is (object)0 == (object)0 different from ((object)0).Equals((object)0)?
...thod Object.Equals. This is a virtual method which will filter down to Int32.Equals and this checks for a boxed integer. Both integer values are 0 hence they are equal
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