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getting the screen density programmatically in android?
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Ωmega
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answered Jul 2 '10 at 14:26
joshperryjoshperry
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What is the meaning of the prefix N in T-SQL statements and when should I use it?
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edited May 23 '17 at 12:10
Community♦
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answered Apr 5 '12 at 8:20
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JPA: How to have one-to-many relation of the same Entity type
...f the relationship is the same. The general case is detailed in Section 2.10.2 of the JPA 2.0 spec.
Here's a worked example. First, the entity class A:
@Entity
public class A implements Serializable {
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long id;
@ManyToOne
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Double vs. BigDecimal?
...as a certain precision. Working with doubles of various magnitudes (say d1=1000.0 and d2=0.001) could result in the 0.001 being dropped alltogether when summing as the difference in magnitude is so large. With BigDecimal this would not happen.
The disadvantage of BigDecimal is that it's slower, and...
Why exactly is eval evil?
...roblems and generates faster code, sometimes MUCH MUCH MUCH (that's factor 1000 ;-) )faster code
code that's constructed and needs to be evaluated can't be compiled as early as possible.
eval of arbitrary user input opens up security problems
some use of evaluation with EVAL can happen at the wro...
jquery data selector
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101
I've created a new data selector that should enable you to do nested querying and AND conditio...
What is the difference between float and double?
...are calculated:
double has 52 mantissa bits + 1 hidden bit: log(253)÷log(10) = 15.95 digits
float has 23 mantissa bits + 1 hidden bit: log(224)÷log(10) = 7.22 digits
This precision loss could lead to greater truncation errors being accumulated when repeated calculations are done, e.g.
float a = ...
How can I know when an EditText loses focus?
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Sandeep YohansSandeep Yohans
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RuntimeError on windows trying python multiprocessing
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edited Jul 17 '18 at 10:12
answered Aug 13 '13 at 9:10
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How to use QueryPerformanceCounter?
...; "QueryPerformanceFrequency failed!\n";
PCFreq = double(li.QuadPart)/1000.0;
QueryPerformanceCounter(&li);
CounterStart = li.QuadPart;
}
double GetCounter()
{
LARGE_INTEGER li;
QueryPerformanceCounter(&li);
return double(li.QuadPart-CounterStart)/PCFreq;
}
int mai...