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Delete files older than 15 days using PowerShell
...l be deleted), remove the switch to actually delete the files:
$old = 15
$now = Get-Date
Get-ChildItem $path -Recurse |
Where-Object {-not $_.PSIsContainer -and $now.Subtract($_.CreationTime).Days -gt $old } |
Remove-Item -WhatIf
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Why can't variable names start with numbers?
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It's a convention now, but it started out as a technical requirement.
In the old days, parsers of languages such as FORTRAN or BASIC did not require the uses of spaces. So, basically, the following are identical:
10 V1=100
20 PRINT V1
and
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Can't install PIL after Mac OS X 10.9
... tool, in Mountain Lion this was an option on the xcode Download page, but now you have to register with your apple id and download from: https://developer.apple.com/downloads/
Look for Command Line Tools (OS X Mavericks) for Xcode
2) Install everything needed for python (using brew), I believe yo...
Make body have 100% of the browser height
... thanks, this seem to remove the white bar on short pages, but now on pages which height exceeds the browser window height I get a 20px white bar at the bottom :|
– bodyofheat
Jul 11 '11 at 19:01
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What is copy-on-write?
I would like to know what copy-on-write is and what it is used for? The term 'copy-on-write array' is mentioned several times in the Sun JDK tutorials but I didn't understand what it meant.
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MySQL SELECT only not null values
...uld use IS NOT NULL. (The comparison operators = and <> both give UNKNOWN with NULL on either side of the expression.)
SELECT *
FROM table
WHERE YourColumn IS NOT NULL;
Just for completeness I'll mention that in MySQL you can also negate the null safe equality operator but this is not sta...
Class method differences in Python: bound, unbound and static
...f a class, cf. this question) to not create bound methods for method_two.
Now, you can invoke static method both on an instance or on the class directly:
>>> a_test = Test()
>>> a_test.method_one()
Called method_one
>>> a_test.method_two()
Called method_two
>>> ...
Traits in PHP – any real world examples/best practices? [closed]
Traits have been one of the biggest additions for PHP 5.4. I know the syntax and understand the idea behind traits, like horizontal code re-use for common stuff like logging, security, caching etc.
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Click button copy to clipboard using jQuery
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Edit as of 2016
As of 2016, you can now copy text to the clipboard in most browsers because most browsers have the ability to programmatically copy a selection of text to the clipboard using document.execCommand("copy") that works off a selection.
As with some...
C#: Printing all properties of an object [duplicate]
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The ObjectDumper class has been known to do that. I've never confirmed, but I've always suspected that the immediate window uses that.
EDIT: I just realized, that the code for ObjectDumper is actually on your machine. Go to:
C:/Program Files/Microsoft Visual...