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Optimal number of threads per core
... what I've found:
Note that all threads work on one array but different ranges (two threads do not access the same index), so the results may differ if they've worked on different arrays.
The 1.86 machine is a macbook air with an SSD. The other mac is an iMac with a normal HDD (I think it's 7200...
What is the significance of load factor in HashMap?
...uld add a bit about how the hashCode is stripped down to a number with the range of 1-{count bucket}, and so it is not per-se the number of buckets, but that end-result of the hash algorithm covers a larger range. HashCode is not the full hash algorithm, it is just small enough to be easily re-proce...
Randomize a List
...in(string[] args)
{
var numbers = new List<int>(Enumerable.Range(1, 75));
numbers.Shuffle();
Console.WriteLine("The winning numbers are: {0}", string.Join(", ", numbers.GetRange(0, 5)));
}
}
public static class ThreadSafeRandom
{
[ThreadStatic] private s...
Is an index needed for a primary key in SQLite?
...d with a specific rowid, or for all records with rowids within a specified range is around twice as fast as a similar search made by specifying any other PRIMARY KEY or indexed value.
With one exception noted below, if a rowid table has a primary key that consists of a single column and the declared...
Is there a way to ignore a single FindBugs warning?
...he annotation directly above the offending code
@SuppressWarnings("OUT_OF_RANGE_ARRAY_INDEX")
See here for more info: findbugs Spring Annotation
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Programmatically Lighten or Darken a hex color (or rgb, and blend colors)
...in the form: {r: XXX, g: XXX, b: XXX, a: X.XXX}. Where .r, .g, and .b have range 0 to 255. And when there is no alpha: .a is -1. Otherwise: .a has range 0.000 to 1.000.
For RGB output, it outputs rgba() over rgb() when a color with an alpha channel was passed into c0 (from) and/or c1 (to).
Minor Err...
Is the NOLOCK (Sql Server hint) bad practice?
...pdate then moves onto updating the covering index. UPDATE reaches an index range locked by the SELECT and becomes blocked. SPID 1) still seeking through the covering index, finds a range locked by the UPDATE and becomes blocked. DEADLOCK. Nothing can solve that deadlock (except catching SQL Server e...
JavaScript % (modulo) gives a negative result for negative numbers
...e to change the behaviour of the remainder operator, it would break a good range of programs using it. That's never going to happen.
– Aegis
Feb 2 '16 at 23:16
11
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Should you ever use protected member variables?
... cannot allow any method in your class to rely on its value being within a range, because a subclass can always place it out of range.
For example, if I have a class that defines width and height of a renderable object, and I make those variables protected, I then can make no assumptions over (for ...
Join strings with a delimiter only if strings are not null or empty
....
For those who are interested in an efficient solution working in a wide range of browsers (including IE 5.5 - 8) and which doesn't require jQuery, see below:
var join = function (separator /*, strings */) {
// Do not use:
// var args = Array.prototype.slice.call(arguments, 1);
/...