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How to convert SecureString to System.String?
...rtainly use the unsafe keyword and a char*, just call bstr.ToPointer() and cast.
– Ben Voigt
Jun 21 '16 at 16:23
@BenV...
how to show progress bar(circle) in an activity having a listview before loading the listview with d
...ists. SO, in the AsyncTask's onPreExecute() I use something like this:
// CAST THE LINEARLAYOUT HOLDING THE MAIN PROGRESS (SPINNER)
LinearLayout linlaHeaderProgress = (LinearLayout) findViewById(R.id.linlaHeaderProgress);
@Override
protected void onPreExecute() {
// SHOW THE SPINNER WHILE ...
Is there a more elegant way of adding an item to a Dictionary safely?
... throw) and the indexer otherwise. (It's a bit like the difference between casting and using as for reference conversions.)
If you're using C# 3 and you have a distinct set of keys, you can make this even neater:
var currentViews = new Dictionary<string, object>()
{
{ "Customers", "view2...
Null coalescing in powershell
...e unwanted whitespace round it:
$name = ([string]$row.td[0]).Trim()
The cast to string protects against the element being null and prevents any risk of Trim() failing.
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Preserving order with LINQ
... You can map a source element by index to a result element
AsEnumerable
Cast
Concat
Select
ToArray
ToList
Preserves Order. Elements are filtered or added, but not re-ordered.
Distinct
Except
Intersect
OfType
Prepend (new in .net 4.7.1)
Skip
SkipWhile
Take
TakeWhile
Where
Zip (new in .net 4)
...
Difference between case object and object
... difference:
scala> foo.asInstanceOf[Serializable]
java.lang.ClassCastException: foo$ cannot be cast to scala.Serializable
... 43 elided
scala> foocase.asInstanceOf[Serializable]
res1: Serializable = foocase
toString difference:
scala> foo
res2: foo.type = foo$@7bf0b...
Do I have to guard against SQL injection if I used a dropdown?
... is also "involving any variable data". There are a few cases like PHP int casting maybe but it seems better to just use prepared statements. Telling (unexperienced) people that a minor performance "boost" is more important than security is way off. The answer is "incomplete" but it sends a strong m...
How to easily map c++ enums to strings
...(temp.str()); \
os << enumName << "::" << strings[static_cast<int>(value)]; \
return os;}
To use it in your code, simply do:
AWESOME_MAKE_ENUM(Animal,
DOG,
CAT,
HORSE
);
auto dog = Animal::DOG;
std::cout<<dog;
...
In C/C++ what's the simplest way to reverse the order of bits in a byte?
...e caveat (as stated on the linked page) is that it needs to be assigned or cast into an uint8_t or there will be garbage in the upper bits.
– Arkku
Apr 8 '10 at 20:20
...
Check for column name in a SqlDataReader object
...is a working sample for Jasmin's idea:
var cols = r.GetSchemaTable().Rows.Cast<DataRow>().Select
(row => row["ColumnName"] as string).ToList();
if (cols.Contains("the column name"))
{
}
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