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SQL variable to hold list of integers
...e TabA.ID in (select id from @listOfIDs)
or
declare @listOfIDs varchar(1000);
SET @listOfIDs = ',1,2,3,'; --in this solution need put coma on begin and end
select *
from TabA
where charindex(',' + CAST(TabA.ID as nvarchar(20)) + ',', @listOfIDs) > 0
...
How costly is .NET reflection?
...y Things, Jeff Richter shows that calling a method by reflection is about 1000 times slower than calling it normally.
Jeff's tip: if you need to call the method multiple times, use reflection once to find it, then assign it to a delegate, and then call the delegate.
...
In Scala how do I remove duplicates from a list?
... :: result else result)
.reverse
Performance results on a list of 100,000,000 random Ints from 0-99:
distinct : 0.6655373s
distinctOnSorted: 0.2848134s
Performance with MutableList or ListBuffer
While it would seem that a more mutable / non-functional programming approach might be faste...
C# Float expression: strange behavior when casting the result float to int
...
Look at the IL:
IL_0000: ldc.i4.s 3D // speed1 = 61
IL_0002: stloc.0
IL_0003: ldc.r4 00 00 78 42 // tmp = 62.0f
IL_0008: stloc.1
IL_0009: ldloc.1
IL_000A: conv.i4
IL_000B: stloc.2
The compiler reduces compile-t...
Java String - See if a string contains only numbers and not letters
...c class StringIsNumberBenchmark {
private static final long CYCLES = 1_000_000L;
private static final String[] STRINGS = {"12345678901","98765432177","58745896328","35741596328", "123456789a1", "1a345678901", "1234567890 "};
private static final Pattern PATTERN = Pattern.compile("\\d+");...
Random Number Between 2 Double Numbers
... LogDate = criteriaDate,
BOEActual = GetRandomDouble(random, 100, 1000),
BOEForecast = GetRandomDouble(random, 100, 1000)
});
}
double GetRandomDouble(Random random, double min, double max)
{
return min + (random.NextDouble() * (max - min));
}
Doing this way you have the ...
Paging with Oracle
...at 1 and increments for each row. So in this snippet of code, if you have 1000 rows, the sort order is applied and then each row is assigned a rownum. The outer select(s) use those row numbers to locate the 'page' you are looking for based on your pagesize.
– Brian Schmitt
...
Will using 'var' affect performance?
...t ([0] string string1,
[1] string string2)
IL_0000: nop
IL_0001: ldc.i4.s 9
IL_0003: newarr [mscorlib]System.Char
IL_0008: newobj instance void [mscorlib]System.String::.ctor(char[])
IL_000d: stloc.0
IL_000...
Is std::vector so much slower than plain arrays?
...
You are doing 1 000 000 000 array accesses. The time difference is 0.333 seconds. Or a difference of 0.000000000333 per array access. Assuming a 2.33 GHz Processor like mine that's 0.7 instruction pipeline stages per array accesses. So the v...
:not(:empty) CSS selector is not working?
...olute;
top: calc(50% - 5px);
font-size: 22px;
left: 0;
color: #000;
transition: all 0.3s;
}
.floating-label-input input:focus ~ label, .floating-label-input input:focus ~ label, .floating-label-input input:valid ~ label {
top: 0;
font-size: 15px;
color: #33bb55;
}
.floati...