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What is array to pointer decay?
... decay doesn't happen.
If you're passing an array by value, what you're really doing is copying a pointer - a pointer to the array's first element is copied to the parameter (whose type should also be a pointer the array element's type). This works due to array's decaying nature; once decayed, size...
Get all inherited classes of an abstract class [duplicate]
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This is such a common problem, especially in GUI applications, that I'm surprised there isn't a BCL class to do this out of the box. Here's how I do it.
public static class ReflectiveEnumerator
{
static ReflectiveEnumerator() { }
public static IEnumera...
How can I get column names from a table in SQL Server?
I want to query the name of all columns of a table. I found how to do this in:
20 Answers
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Which comment style should I use in batch files?
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dbenhamdbenham
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记录一些Mac OS X技巧 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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sudo launchctl unload -w /System/Library/LaunchDaemons/com.apple.dynamic_pager.plist
禁用以后，磁盘上还保留着这些交换文件，它们已经没用了，也可以删掉：
sudo rm /private/var/vm/swapfile*
如果要重新启用虚拟内存的话，可以执行这条命令：
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How can I calculate the time between 2 Dates in typescript
...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
what does the __file__ variable mean/do?
I usually just hard-wire these with the actual path. But there is a reason for these statements that determine path at runtime, and I would really like to understand the os.path module so that I can start using it.
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Converting NSString to NSDate (and back again)
...String = @"01-02-2010";
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateFormat:@"dd-MM-yyyy"];
NSDate *dateFromString = [dateFormatter dateFromString:dateString];
NSDate convert to NSString:
NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[d...
Do while loop in SQL Server 2008
...not inverted. On the other hand it is also more verbose.
If it wasn't for all of the disdain around the use of GOTO, these might even be idiomatic solutions for those few times when these particular (evil) looping constructs are necessary in T-SQL code for the sake of clarity.
Use these at your ow...
Creating an index on a table variable
...ds of adding constraint based indexes discussed below SQL Server 2014 also allows non unique indexes to be specified directly with inline syntax on table variable declarations.
Example syntax for that is below.
/*SQL Server 2014+ compatible inline index syntax*/
DECLARE @T TABLE (
C1 INT INDEX IX...