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What is the worst gotcha in C# or .NET? [closed]
I was recently working with a DateTime object, and wrote something like this:
61 Answers
...
Add a column with a default value to an existing table in SQL Server
... (0)--Optional Default-Constraint.
WITH VALUES --Add if Column is Nullable and you want the Default Value for Existing Records.
Notes:
Optional Constraint Name:
If you leave out CONSTRAINT D_SomeTable_SomeCol then SQL Server will autogenerate
a Default-Contraint with a funny Name like: DF__...
Hashing a dictionary?
...thon 3.3 returns different results between sessions). make_hashable() will convert the object into nested tuples and make_hash_sha256() will also convert the repr() to a base64 encoded SHA256 hash.
import hashlib
import base64
def make_hash_sha256(o):
hasher = hashlib.sha256()
hasher.updat...
Set style for TextView programmatically
... content:
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="This is a template"
style="@style/my_style" />
th...
Nullable type issue with ?: Conditional Operator
...nch of times already. The compiler is telling you that it doesn't know how convert null into a DateTime.
The solution is simple:
DateTime? foo;
foo = true ? (DateTime?)null : new DateTime(0);
Note that Nullable<DateTime> can be written DateTime? which will save you a bunch of typing.
...
When should you not use virtual destructors?
... is not a good answer. "There is no need" is different from "should not", and "no intention" is different from "made impossible".
– Windows programmer
Nov 19 '08 at 4:59
5
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libcurl的使用总结 - C/C++ - 清泛网 - 专注C/C++及内核技术
..._init()初始化libcurl
2. 调用 curl_easy_init()函数得到 easy interface型指针
3. 调用curl_easy_setopt设置传输选项
4. 根据curl_easy_setopt设置的传输选项，实现回调函数以完成用户特定任务
5. 调用curl_easy_perform（）函数完成...
Implement C# Generic Timeout
...CallWithTimeout. This will cancel the long running thread by aborting it, and swallowing the ThreadAbortException:
Usage:
class Program
{
static void Main(string[] args)
{
//try the five second method with a 6 second timeout
CallWithTimeout(FiveSecondMethod, 6000);
...
How to get the current directory in a C program?
...is program is written for UNIX computers. I've been looking at opendir() and telldir() , but telldir() returns a off_t (long int) , so it really doesn't help me.
...
What is the combinatory logic equivalent of intuitionistic type theory?
...tution), it'll be handy to represent intermediate stages in the process of converting terms with binding to their combinatory form.
Here's normalization:
norm :: Unty a -> Unty a
norm (f :. a) = norm f $. a
norm c = c
($.) :: Unty a -> Unty a -> Unty a -- requires first a...