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Why cast an unused function parameter value to void?
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@Benoit what does casting to void actually do? Is its only function to show the compiler that you're intentionally ignoring something or does (void) actually do something and when the compiler sees it, it'll just count it as having done someth...
How to negate a method reference predicate
... method reference. See @vlasec's answer below that shows how by explicitly casting the method reference to a Predicate and then converting it using the negate function. That is one way among a few other not too troublesome ways to do it.
The opposite of this:
Stream<String> s = ...;
int empt...
How can I get the actual stored procedure line number from an error message?
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@ErrorMessage = ERROR_MESSAGE() + ' occurred at Line_Number: ' + CAST(ERROR_LINE() AS VARCHAR(50)),
@ErrorSeverity = ERROR_SEVERITY(),
@ErrorState = ERROR_STATE();
RAISERROR (@ErrorMessage, -- Message text.
@ErrorSeverity, -- Severity.
@ErrorState -- State.
);
END...
How to reshape data from long to wide format
...age also does this simply, with gather()/spread() being the terms for melt/cast.
Edit: Now, in 2019, tidyr v 1.0 has launched and set spread and gather on a deprecation path, preferring instead pivot_wider and pivot_longer, which you can find described in this answer. Read on if you want a brief gli...
How do I convert a decimal to an int in C#?
...an also use Decimal.ToInt32. Again, see MSDN. Finally, you can do a direct cast as in
decimal value = 3.14m;
int n = (int) value;
which uses the explicit cast operator. See MSDN.
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SQL order string as number
... to a number if you only store numbers anyway.
If you can't do that then cast your column value to an integer explicitly with
select col from yourtable
order by cast(col as unsigned)
or implicitly for instance with a mathematical operation which forces a conversion to number
select col from y...
LR性能指标解释 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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4.JMap。监控java程序是否有内存泄漏，需要配合eclipse插件或者MemoryAnalyzer来使用。
5.JProfiler。全面监控每个节点的CPU使用率、内存使用率、响应时间累计值、线程执行情况等，需要在JVM参数中进行配置。
6.Nmon。全面监控linux...
How to get C# Enum description from value? [duplicate]
...The default underlying data type for an enum in C# is an int, you can just cast it.
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How to check that an object is empty in PHP?
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You can cast to an array and then check if it is empty or not
$arr = (array)$obj;
if (!$arr) {
// do stuff
}
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How to cast Object to its actual type?
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Nevermind, found as for typecasting and type(of: ClassName) function to check instance type.
– Nagendra Rao
Apr 22 '17 at 20:34
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