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Best way to represent a fraction in Java?
...null)
throw new IllegalArgumentException("Null argument");
//n1/d1 + n2/d2 = (n1*d2 + d1*n2)/(d1*d2)
return new BigFraction(numerator.multiply(f.denominator).add(denominator.multiply(f.numerator)),
denominator.multiply(f.denominator));
}
/**
* Retur...
Detect if Visual C++ Redistributable for Visual Studio 2012 is installed
..., but working in 100% of all systems, and even extendable to the numerous .net frameworks.
The complexity comes from the fact that there are (and were) many VC runtimes revisions which could lead to the case that although VC10 runtimes were installed, their build number was not recent enough so you...
Moving decimal places over in a double
...he second has a fixed round error.
for(int i=0;i<200;i++) {
double d1 = (double) i / 100;
double d2 = i * 0.01;
if (d1 != d2)
System.out.println(d1 + " != "+d2);
}
prints
0.35 != 0.35000000000000003
0.41 != 0.41000000000000003
0.47 != 0.47000000000000003
0.57 != 0.57000000...
Split a vector into chunks in R
...3 3 8 11 6 6 1 8 4
> max <- 20
> x <- seq_along(d)
> d1 <- split(d, ceiling(x/max))
> d1
$`1`
[1] 3 1 11 4 1 2 3 2 4 10 10 2 7 4 6 6 2 1 1 2
$`2`
[1] 3 8 3 10 7 4 3 4 4 1 1 7 2 4 6 0 5 7 4 6
$`3`
[1] 8 4 7 12 4 6 8 4 2 7 ...
How do you use the “WITH” clause in MySQL?
...ATE VIEW D AS (SELECT YEAR, SUM(SALES) AS S FROM T1 GROUP BY YEAR);
SELECT D1.YEAR, (CASE WHEN D1.S>D2.S THEN 'INCREASE' ELSE 'DECREASE' END) AS TREND
FROM
D AS D1,
D AS D2
WHERE D1.YEAR = D2.YEAR-1;
DROP VIEW D;
2) Recursive queries can be done with a stored procedure that makes the call sim...
Convert MySql DateTime stamp into JavaScript's Date format
...HH:MM:SS" or even the short form (only date) "YYYY-MM-DD" you can do:
var d1 = Date.createFromMysql("2011-02-20");
var d2 = Date.createFromMysql("2011-02-20 17:16:00");
alert("d1 year = " + d1.getFullYear());
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...
An error occurred while signing: SignTool.exe not found
...ou still find the same issue, please check if you installed the Microsoft .NET Framework 4.5 Developer Preview on the system. The Microsoft .NET Framework 4.5 Developer Preview is a prerelease version of the .NET Framework, and should not be used in production scenarios. It is an in-place update to ...
Location Services not working in iOS 8
...nswered Sep 30 '14 at 10:24
neo D1neo D1
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Linux反编译全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...的例子程序你可以到这来下载:
http://www.crackmes.de/users/veneta/crackmes/linux_crackme_v2 。古人云“工欲善其事，必先利其器”，本文中所用到的工具及操作平台罗列如下:
操作平台: gentoo 2004.3 # kernel 2.6.9
逆向工具:
反汇编 -- obj...
Generating v5 UUID. What is name and namespace?
... the 20-byte hash from SHA1:
SHA1 Digest: 74738ff5 5367 e958 9aee 98fffdcd1876 94028007
UUID (v5): 74738ff5-5367-5958-9aee-98fffdcd1876
^_low nibble is set to 5, to indicate type 5
^_first two bits set to 1 and 0, respectively
(No...