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In SQL, what's the difference between count(column) and count(*)?
... The answer posted by @Alan states "count(*) is computed by looking at the indexes on the table in question rather than the actual data rows" which, if true, invalidates your comment. I appreciate that @Alan may be wrong but I'm interested in the source of your information in order to find out which...
When should I use the HashSet type?
...id Clear();
bool Contains(T item);
void CopyTo(T[] array, int arrayIndex);
bool Remove(T item);
// Properties
int Count { get; }
bool IsReadOnly { get; }
}
A List<T> implements IList<T>, which extends the ICollection<T>
public interface IList<T> : IC...
How to style SVG with external CSS?
... want them to have different fill colors, this won't work, but if you want all your paths to be the same, this should work.
In your html file, you want something like this:
<style>
.fill-red { fill: red; }
.fill-blue { fill: blue; }
</style>
<a href="//www.example.com/">
&...
Convert light frequency to RGB?
..._MAX)
return new byte[3];
len -= LEN_MIN;
var index = (int)Math.Floor(len / LEN_STEP);
var offset = len - LEN_STEP * index;
var x = Interpolate(X, index, offset);
var y = Interpolate(Y, index, offset);
var z = Interpolate(Z, index, offset...
Creating a blurring overlay view
...e blur as the background of the view: view.insertSubview(blurEffectView, atIndex: 0)
– Michael Voccola
Apr 6 '15 at 22:52
2
...
How do I remove diacritics (accents) from a string in .NET?
...string> entry in foreign_characters)
{
if(entry.Key.IndexOf (c) != -1)
{
return entry.Value[0];
}
}
return c;
}
public static string RemoveDiacritics(this string s)
{
//StringBuilder sb = new StringB...
Writing a git post-receive hook to deal with a specific branch
...oks pushes to Assembla.
What i need is to push only one branch (master, ideally) when someone pushes changes to that branch on our server, and ignore pushes to other branches. Is it possible to select the branch from a bare repo and push only that branch to Assembla?
...
Adding a column to a data.frame
..." section of the relevant help text, [[.data.frame.
Data frames can be indexed in several modes. When [ and [[ are used with a single vector index (x[i] or x[[i]]), they index the data frame as if it were a list.
my.dataframe["new.col"] <- a.vector
my.dataframe[["new.col"]] <- a.vector
...
Possible to access the index in a Hash each loop?
I'm probably missing something obvious, but is there a way to access the index/count of the iteration inside a hash each loop?
...
How do I output the difference between two specific revisions in Subversion?
...
If you want pretty output, install colordiff and add ` | colordiff` to the end of the above command to pipe everything through it.
– William Turrell
Sep 28 '16 at 19:25
...