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C# 4.0: Can I use a TimeSpan as an optional parameter with a default value?
...following types: bool, byte, char, double, float, int, long, sbyte, short, string, uint, ulong, ushort.
The type object.
The type System.Type.
An enum type.
(provided it has public accessibility and the types in which it is nested (if any) also have public accessibility)
Single-dimensional...
How to use find command to find all files with extensions from list?
...rdless of filename (or extension).
If /path/to or a filename contains the string image, then the above may return bogus hits. In that case, I'd suggest
cd /path/to
find . -type f -print0 | xargs -0 file --mime-type | grep -i image/
...
How do I create a class instance from a string name in ruby?
...
Very simple in Rails: use String#constantize
class_name = "MyClass"
instance = class_name.constantize.new
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fastest (low latency) method for Inter Process Communication between Java and C/C++
... The following code takes exactly 0.1 microsecond, while doing a primitive string concatenation only:
int j=123456789;
String ret = "my-record-key-" + j + "-in-db";
P.P.P.S - hope this is not too much off-topic, but finally I tried replacing Thread.sleep(0) with incrementing a static volatile in...
Where is Python's sys.path initialized from?
...on is executing is added to sys.path.
On Windows, this is always the empty string, which tells python to
use the full path where the script is located instead.
The contents of PYTHONPATH environment variable, if set, is added to sys.path, unless you're
on Windows and applocal is set to true in pyven...
object==null or null==object?
...e value would be 0 and the article's promise would not hold. The fact that Strings are objects and ints are primitives is irrelevant of the fact that a programmer may forget to init a variable. In this question we simply solve the null String comparison thing.
– cherouvim
...
Pass a PHP array to a JavaScript function [duplicate]
...y); ?>, ...)
In cases where you need to parse out an object from JSON-string (like in an AJAX request), the safe way is to use JSON.parse(..) like the below:
var s = "<JSON-String>";
var obj = JSON.parse(s);
sha...
Sending email in .NET through Gmail
...ame");
var toAddress = new MailAddress("to@example.com", "To Name");
const string fromPassword = "fromPassword";
const string subject = "Subject";
const string body = "Body";
var smtp = new SmtpClient
{
Host = "smtp.gmail.com",
Port = 587,
EnableSsl = true,
DeliveryMethod = SmtpDeli...
App Inventor 2开发计步器与定位器 - App Inventor 2 中文网 - 清泛IT论坛，有思想、有深度
...以参考我摘录的官方的一个说明：http://blog.sina.com.cn/s/blog_66fa66650102w7is.html以及我在实施地图调用过程中的一些记录说明：http://blog.sina.com.cn/s/blog_66fa66650102wwfl.html（3）调用高德地图：
高德地图的uri参考地址：http://lbs.amap.com/api/u...
What are the advantages of using nullptr?
...pecified by C standard useless in many C++ expressions. For example:
std::string * str = NULL; //Case 1
void (A::*ptrFunc) () = &A::doSomething;
if (ptrFunc == NULL) {} //Case 2
If NULL was defined as (void *)0, neither of above expressions would work.
Case 1: Will not com...