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ActiveRecord: size vs count
... can find the number of records using both Model.size and Model.count . If you're dealing with more complex queries is there any advantage to using one method over the other? How are they different?
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Fastest way to check if a file exist using standard C++/C++11/C?
I would like to find the fastest way to check if a file exist in standard C++11, C++, or C. I have thousands of files and before doing something on them I need to check if all of them exist. What can I write instead of /* SOMETHING */ in the following function?
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Redirect Windows cmd stdout and stderr to a single file
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If there is a Handle, there cannot be a space between the Handle (i.e. 2) and the redirect operator (i.e. >). Therefore 2> 2.txt works (or 2> &1) 2 > 2.txt does not; 2 > &1 does not.
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Using Excel OleDb to get sheet names IN SHEET ORDER
... dt = objConn.GetOleDbSchemaTable(OleDbSchemaGuid.Tables, null);
if(dt == null)
{
return null;
}
String[] excelSheets = new String[dt.Rows.Count];
int i = 0;
// Add the sheet name to the string array.
foreach(DataRow row in dt.Ro...
What is a Question Mark “?” and Colon “:” Operator Used for? [duplicate]
...ind more information on their use? I've read that they are similar to an 'if' 'else' statement.
7 Answers
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Concurrent HashSet in .NET Framework?
... you the same advantages than a HashSet<T> except key and value are different objects.
Source: Social MSDN
ConcurrentBag
If you don't mind about the duplicate entries, you can use the class ConcurrentBag<T> in the same namespace of the previous class.
private ConcurrentBag<string&...
What is the Scala annotation to ensure a tail recursive function is optimized?
...unction. Do you just put it in front of the declaration? Does it also work if Scala is used in scripting mode (for instance using :load <file> under REPL)?
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When should I use GC.SuppressFinalize()?
...= false;
protected virtual void Dispose(bool disposing)
{
if (!disposed)
{
if (disposing)
{
// called via myClass.Dispose().
// OK to use any private object references
}
// Release unmanaged res...
Twitter Bootstrap Tabs: Go to Specific Tab on Page Reload or Hyperlink
... few minor issues, one of which is I do not know how go directly to a specific tab from an external link. For example:
24 ...
Kotlin Ternary Conditional Operator
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In Kotlin, if statements are expressions. So the following code is equivalent:
if (a) b else c
The distinction between expression and statement is important here. In Java/C#/JavaScript, if forms a statement, meaning that it does not ...