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When should one use a spinlock instead of mutex?
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The Theory
In theory, when a thread tries to lock a mutex and it does not succeed, because the mutex is already locked, it will go to sleep, immediately allowing another thread to run. It will continue to sleep until being woken up, which will be the case once the mutex is being unl...
Hide all but $(this) via :not in jQuery selector
...ean $("table tr") (with a space instead of a dot).
The way you have it, it selects every table which has a class of tr (eg, <table class="tr">), which is probably not what you want.
For more information, see the documentation.
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How to check if a model has a certain column/attribute?
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For bonus points use Hash#select: number_hash.select { |key, value| Number.column_names.include? key }
– hgmnz
Nov 10 '09 at 18:31
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Unique (non-repeating) random numbers in O(1)?
... max
At each iteration, a random number r is selected between 0 and max, array[r] and array[max] are swapped, the new array[max] is returned, and max is decremented:
max = 10, r = 3
+--------------------+
v v
+--+--+--+--+--+--+...
Check if a string contains a substring in SQL Server 2005, using a stored procedure
...orce it within this test if you need it one way or the other. E.g. compare select CHARINDEX('ME' collate Latin1_General_CS_AS,'Home') and select CHARINDEX('ME' collate Latin1_General_CI_AS,'Home'). (In collations, CS stands for Case Sensitive and I'm sure you can work out CI).
–...
How to reuse existing C# class definitions in TypeScript projects
...code you can use my extension csharp2ts which does exactly that.
You just select the pasted C# code and run the Convert C# to TypeScript command from the command palette
A conversion example:
public class Person
{
/// <summary>
/// Primary key
/// </summary>
public int...
java: (String[])List.toArray() gives ClassCastException
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Please! Format your code! Select all of it at press "ctrl + k", or add " ` " before the first letter of code and at the last one another one. You can also select "{}" in the help at the top when writing the answer!
– M.K
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Commit changes to a different branch than the currently checked out branch with subversion
... It must not be the root of the repository, less to duplicate in that way;
Select TortoiseSVN -> "Branch/tag...";
Set To URL: "svn://host/repository/FooBar/branches/FooBarBranchName";
Make sure [*] Working copy is selected. This will ensure the changes are commited;
Log message: "Experimenting wi...
Application Skeleton to support multiple screens
...clipse, it's easy to create multiple emulators (from the Eclipse menu bar, select Window > AVD Manager > New) configured with values for real devices:
Name the emulator for the real device it's emulating
Specify Resolution, don't use Built-in generic sizes
Set the device density to match the ...
Calculate the number of business days between two dates?
...I changed the last loop for a Linq statement: businessDays -= bankHolidays.Select(bankHoliday => bankHoliday.Date).Count(bh => firstDay <= bh && bh <= lastDay);
– JoanComasFdz
Nov 23 '12 at 8:40
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