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Can't subtract offset-naive and offset-aware datetimes
...L. When I pull data from the table, I then want to subtract the time right now so I can get it's age.
10 Answers
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Most efficient way to concatenate strings?
...many concatenations. It isn't trivial to find out for any given situation. If performance is of issue, profiling is your friend (check ANTS).
– Abel
Nov 4 '09 at 13:22
32
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Indenting #defines
.... Use which ever style (space before "#" or space between "#" and the identifier) you prefer.
http://www.delorie.com/gnu/docs/gcc/cpp_48.html
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How do you convert a JavaScript date to UTC?
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Simple and stupid
var date = new Date();
var now_utc = Date.UTC(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(),
date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds());
return new Date(now_utc);
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How do you implement a private setter when using an interface?
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In interface you can define only getter for your property
interface IFoo
{
string Name { get; }
}
However, in your class you can extend it to have a private setter -
class Foo : IFoo
{
public string Name
{
get;
private set;
}
}
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Possible reasons for timeout when trying to access EC2 instance
...ed.)
Update: Ok, not a security group issue. But does the problem persist if you launch up another instance from the same AMI and try to access that? Maybe this particular EC2 instance just randomly failed somehow – it is only matter of time that something like that happens. (Recommended reading...
How to get the instance id from within an ec2 instance?
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Run:
wget -q -O - http://169.254.169.254/latest/meta-data/instance-id
If you need programatic access to the instance ID from within a script,
die() { status=$1; shift; echo "FATAL: $*"; exit $status; }
EC2_INSTANCE_ID="`wget -q -O - http://169.254.169.254/latest/meta-data/instance-id || die \"...
Get record counts for all tables in MySQL database
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or, if you want for each table: SELECT table_name, TABLE_ROWS FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '{your_db}';
– TheSoftwareJedi
Nov 13 '08 at 2:03
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How to write lists inside a markdown table?
... @TreborRude No, because Markdown is not HTML actually. But if you use a library (e.g. marked), you probably have this feature (to combine HTML with markdown).
– Ionică Bizău
Aug 5 '14 at 12:59
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MFC 的SetWindowPos 用法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...NT uFlags // window-positioning flags
);
参数解释:
hWnd
Identifies the window. 窗口句柄
hWndInsertAfter 窗口叠层位置
Identifies the window to precede the positioned window in the Z order. This parameter must be a window handle or one of the following values:
Value Meanin...