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Automatic creation date for Django model form objects?

What's the best way to set a creation date for an object automatically, and also a field that will record when the object was last updated? ...
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How to track down a “double free or corruption” error

... If you're using glibc, you can set the MALLOC_CHECK_ environment variable to 2, this will cause glibc to use an error tolerant version of malloc, which will cause your program to abort at the point where the double free is done. You can set this from gdb ...
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Best way to strip punctuation from a string

... own C code. If speed isn't a worry, another option though is: exclude = set(string.punctuation) s = ''.join(ch for ch in s if ch not in exclude) This is faster than s.replace with each char, but won't perform as well as non-pure python approaches such as regexes or string.translate, as you can ...
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A html space is showing as %2520 instead of %20

... figure out why I was getting it when sending a jQuery ajax request. I was setting the data attribute in an ajax GET request with the encodeURIComponent function on the value, but jQuery already does it by default, hence why i was getting %2520. Really helpful thanks. – Asher ...
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Loop through each row of a range in Excel

... Dim a As Range, b As Range Set a = Selection For Each b In a.Rows MsgBox b.Address Next share | improve this answer | fo...
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Differences between Agda and Idris

.... Agda has universe polymorphism, Idris has cumulativity (and you can have Set : Set in both if you find this too restrictive and don't mind that your proofs might be unsound). share | improve this ...
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How do DATETIME values work in SQLite?

...ecord. The SQLite docs say, however, "SQLite does not have a storage class set aside for storing dates and/or times" and it's "capable of storing dates and times as TEXT, REAL, or INTEGER values". ...
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Android icon vs logo

...e the ActionBar "Home" Icon to be something other than the app icon? setDisplayUseLogoEnabled() Enables the use of an alternative image (a "logo") in the Action Bar, instead of the default application icon. A logo is often a wider, more detailed image that represents the application....
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Assign width to half available screen width declaratively

...ther widget to take up the other half. The trick is using a LinearLayout, setting layout_width="fill_parent" on both widgets, and setting layout_weight to the same value on both widgets as well. If there are two widgets, both with the same weight, the LinearLayout will split the width between the ...
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Adding and removing style attribute from div with jquery

... You could do any of the following Set each style property individually: $("#voltaic_holder").css("position", "relative"); Set multiple style properties at once: $("#voltaic_holder").css({"position":"relative", "top":"-75px"}); Remove a specific style: ...