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Redis: possible to expire an element in an array or sorted set?
...sorted sets, and use a timestamp as the score. It's then trivial to delete items by score range, which could be done periodically, or only on every write, with reads always ignoring the out of range elements, by reading only a range of scores.
More here: https://groups.google.com/forum/#!topic/redi...
In .NET, which loop runs faster, 'for' or 'foreach'?
... Enumerable.Select has an overload that lets you obtain the index of the item, so even the need for an index does not mandate using for. See msdn.microsoft.com/en-us/library/bb534869.aspx
– TrueWill
Dec 22 '09 at 18:16
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How to Remove ReadOnly Attribute on File Using PowerShell?
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You can use Set-ItemProperty:
Set-ItemProperty file.txt -name IsReadOnly -value $false
or shorter:
sp file.txt IsReadOnly $false
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LINQ Ring: Any() vs Contains() for Huge Collections
...ELECT Id
FROM Projects
INNER JOIN (VALUES (1), (2), (3), (4), (5)) AS Data(Item) ON Projects.UserId = Data.Item
while Any() on the other hand always iterate through the O(n).
Hope this will work....
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capturing self strongly in this block is likely to lead to a retain cycle
...= self; // that's enough
self.loadingDidFinishHandler = ^(NSArray *receivedItems, NSError *error){
if (!error) {
[self_ showAlertWithError:error];
} else {
self_.items = [NSArray arrayWithArray:receivedItems];
[self_.tableView reloadData];
}
};
And one very importa...
return query based on date
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You probably want to make a range query, for example, all items created after a given date:
db.gpsdatas.find({"createdAt" : { $gte : new ISODate("2012-01-12T20:15:31Z") }});
I'm using $gte (greater than or equals), because this is often used for date-only queries, where the time ...
How to unzip a file using the command line? [closed]
...ject( "Shell.Application" )
Set objSource = objShell.NameSpace(strZipFile).Items()
Set objTarget = objShell.NameSpace(outFolder)
intOptions = 256
objTarget.CopyHere objSource, intOptions
WScript.Echo ( "Extracted." )
' This bit is for testing purposes
REM Dim MyVar
REM MyVar = MsgBox ( strZipFile...
Servlet returns “HTTP Status 404 The requested resource (/servlet) is not available”
....). Usually the error message is fine Googlable. In case you have no clue, best is to restart from scratch and do not touch any IDE/project configuration defaults. In case you're using Eclipse, you can find instructions in How do I import the javax.servlet API in my Eclipse project?
Testing the ser...
How to add multiple objects to ManyToMany relationship at once in Django ?
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Use: object.m2mfield.add(*items) as described in the documentation:
add() accepts an arbitrary number of arguments, not a list of them.
add(obj1, obj2, obj3, ...)
To expand that list into arguments, use *
add(*[obj1, obj2, obj3])
Addendum:
Dja...
How do I write a “tab” in Python?
... 24
Example for Lists
Here is another example where we are printing the items of list and we want to sperate the items by a TAB.
DataPoints = [0,12,24]
print (str(DataPoints[0]) + "\t" + str(DataPoints[1]) + "\t" + str(DataPoints[2]))
Returns
0 12 24
Raw Strings
Note that raw string...