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Why prefer two's complement over sign-and-magnitude for signed numbers?
... the most significant term negative.
Taking an 8-bit value a7 a6 a5 a4 a3 a2 a1 a0
The usual unsigned binary interpretation is:
27*a7 + 26*a6 + 25*a5 + 24*a4 + 23*a3 + 22*a2 + 21*a1 + 20*a0
11111111 = 128 + 64 + 32 + 16 + 8 + 4 + 2 + 1 = 255
The two's complement interpretation is:
-27*a7 + 26*a6 ...
Design Patterns: Factory vs Factory method vs Abstract Factory
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AbstractProductA, A1 and A2 both implementing the AbstractProductA
AbstractProductB, B1 and B2 both implementing the AbstractProductB
interface Factory {
AbstractProductA getProductA(); //Factory Method - generate A1/A2
}
Using Factory Method,...
How do you check whether a number is divisible by another number (Python)?
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a = 1400
a1 = 5
a2 = 3
b= str(a/a1)
b1 = str(a/a2)
c =b[(len(b)-2):len(b)]
c1 =b[(len(b1)-2):len(b1)]
if c == ".0":
print("yeah for 5!")
if c1 == ".0":
print("yeah for 3!")
...
JavaScript + Unicode regexes
...8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0561-\u0587\u05D0-\u05EA\u05F0-\u05F2\u0620-\u064A\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE\u06EF\u06FA-...
How to make git mark a deleted and a new file as a file move?
...? let's go back a bit
Saved working directory and index state WIP on dir: f7a8685 update
HEAD is now at f7a8685 update
$ git status
On branch workit
Untracked files:
(use "git add <file>..." to include in what will be committed)
.idea/
nothing added to commit but untracked files presen...
Java: Check if enum contains a given string?
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You can use Enum.valueOf()
enum Choices{A1, A2, B1, B2};
public class MainClass {
public static void main(String args[]) {
Choices day;
try {
day = Choices.valueOf("A1");
//yes
} catch (IllegalArgumentException ex) {
//nope
}
}...
How to check whether mod_rewrite is enable on server?
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from the command line, type
sudo a2enmod rewrite
if the rewrite mode is already enabled, it will tell you so!
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Sorting arraylist in alphabetical order (case insensitive)
...lution. Somehow, the A10 goes after A1. Basically, it sorted like A1, A10, A2, A3, etc. Why did it happen and how can I sort list correctly?
– Dante
Oct 5 '14 at 16:39
2
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LINQ Aggregate algorithm explained
... to get min or max items like var biggestAccount = Accounts.Aggregate((a1, a2) => a1.Amount >= a2.Amount ? a1 : a2);
– Franck
Mar 24 '17 at 18:02
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What are some uses of decltype(auto)?
...ltype(auto) x6d = { 1, 2 }; // error, { 1, 2 } is not an expression
auto *x7a = &i; // decltype(x7a) is int*
decltype(auto)*x7d = &i; // error, declared type is not plain decltype(auto)
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