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What is “2's Complement”?
...they had in unsigned binary numbers.
Working out our -15, it is -128 + 64 + 32 + 16 + 1 Try it on your calculator. it's -15.
Of the three main ways that I've seen negative numbers represented in computers, 2's complement wins hands down for convenience in general use. It has an oddity, thoug...
Why does Date.parse give incorrect results?
...
The Input Side
All implementations store their date values internally as 64-bit numbers that represent the number of milliseconds (ms) since 1970-01-01 UTC (GMT is the same thing as UTC). This date is the ECMAScript epoch that is also used by other languages such as Java and POSIX systems such as ...
Is there any advantage of using map over unordered_map in case of trivial keys?
...time_hash_map program to time them. For example, with gcc 4.4.2 on an x86_64 Linux system
$ ./time_hash_map
TR1 UNORDERED_MAP (4 byte objects, 10000000 iterations):
map_grow 126.1 ns (27427396 hashes, 40000000 copies) 290.9 MB
map_predict/grow 67.4 ns (10000000 hashes, 400000...
What's the difference between including files with JSP include directive, JSP include action and usi
...od of the generated servlet, the method can grow very large. If it exceeds 64 KB, your JSP compilation will likely fail.
<jsp:include> - The JSP Action tag on the other hand instructs the container to pause the execution of this page, go run the included page, and merge the output from that ...
Difference between objectForKey and valueForKey?
...
64
When you do valueForKey: you need to give it an NSString, whereas objectForKey: can take any NS...
What is the difference between NTFS Junction Points and Symbolic Links?
...nefits I list above.
Taken from here (a good introductory read)
From SS64 page on MKLink
Comments about Terminology
Junctions are Reparse Points (may be described as symbolic links)
NTFS Junctions and NTFS Symbolic links are really doing the same thing in the same way (reparse points), as...
Xcode doesn't show the line that causes a crash
...g:] + 945
9 UIKit 0x000000010ee2b7da __64-[UIViewController viewDidMoveToWindow:shouldAppearOrDisappear:]_block_invoke + 42
10 UIKit 0x000000010ee29ac4 -[UIViewController _executeAfterAppearanceBlock] + 86
11 UIKit ...
RSS Feeds in ASP.NET MVC
...
64
Here is what I recommend:
Create a class called RssResult that
inherits off the abstract base...
How do I create a nice-looking DMG for Mac OS X using command-line tools?
... -srcfolder "${source}" -volname "${title}" -fs HFS+ \
-fsargs "-c c=64,a=16,e=16" -format UDRW -size ${size}k pack.temp.dmg
Mount the disk image, and store the device name (you might want to use sleep for a few seconds after this operation):
device=$(hdiutil attach -readwrite -noverify -noa...
What is the best way to solve an Objective-C namespace collision?
...g the modern or legacy runtimes, are you fat or single architecture, 32 or 64 bit, what OS releases are you targeting, are you dynamically linking, statically linking, or do you have a choice, and is it potentially okay to do something that might require maintenance for new software updates.
If you...