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如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...参数），最后选择在交叉验证中表现最好的。jmp0xf 译自Edwin Chen
How do you know what machine learning algorithm to choose for your classification problem? Of course, if you really care about accuracy, your best bet is to test out a couple different ones (making sure to try dif...
\d is less efficient than [0-9]
... not [0-9].
You can generate a list of all such characters using the following code:
var sb = new StringBuilder();
for(UInt16 i = 0; i < UInt16.MaxValue; i++)
{
string str = Convert.ToChar(i).ToString();
if (Regex.IsMatch(str, @"\d"))
sb.Append(str);
}
Console.WriteLine(sb.ToStr...
Does Python have a ternary conditional operator?
...ays evaluates everything, whereas the if/else construct only evaluates the winning expression.
– SilverbackNet
Feb 4 '11 at 2:25
120
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module unsafe for SAFESEH image C++
... with zlib see this (CTRL + F safeseh) tannerhelland.com/5076/compile-zlib-winapi-wapi-stdcall
– codekiddy
Nov 30 '15 at 22:21
...
Eclipse - no Java (JRE) / (JDK) … no virtual machine
...used in production.
June 2012, jmbertucci comments:
I'm running Windows 7 64-bit and I had the 32-bit JRE installed.
I downloaded Eclipse 64-bit which looks for a 64-bit JRE.
Because I didn't have the 64-bit JRE it threw the error, which makes sense.
I went to the Java manual in...
stash@{1} is ambiguous?
...
On Windows, PowerShell will eat brackets too. You can escape them with a backtick (git stash drop stash@`{1`})
– Xavier Poinas
May 15 '12 at 6:52
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Solutions for INSERT OR UPDATE on SQL Server
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@CashCow, the last wins, this is what INSERT or UPDATE is supposed to do: the first one inserts, the second updates the record. Adding a lock allow this to happen in a very short time-frame, preventing an error.
– Jean Vin...
How to delay the .keyup() handler until the user stops typing?
...earch field. Right now it searches for every keyup. So if someone types “Windows”, it will make a search with AJAX for every keyup: “W”, “Wi”, “Win”, “Wind”, “Windo”, “Window”, “Windows”.
...
jquery data selector
...Filter is probably just as fast (each is almost certainly slower) but this wins on readability.
– Don
Jun 30 '15 at 19:08
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Best way to serialize an NSData into a hexadeximal string
...:) You are right on the lengthy, I was just trying to hit everywhere I can win microseconds! It divide the loop iterations by 2. But I admit it lacks elegance. Bye
– Moose
Nov 15 '17 at 19:10
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