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How to know if an object has an attribute in Python

...n is that, if the property is likely to be there most of the time, simply call it and either let the exception propagate, or trap it with a try/except block. This will likely be faster than hasattr. If the property is likely to not be there most of the time, or you're not sure, using hasattr will pr...
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How do you get the logical xor of two variables in Python?

...e not comparing apples to oranges, is "if xor( isApple(x), isApple(y) )" really clearer than "if isApple(x) != isApple(y)" ? Not to me! – AmigoNico May 21 '12 at 18:27 109 ...
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phonegap open link in browser

... As suggested in a similar question, use JavaScript to call window.open with the target argument set to _system, as per the InAppBrowser documentation: <a href="#" onclick="window.open('http://www.kidzout.com', '_system'); return false;">www.kidzout.com</a> This sho...
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What does FETCH_HEAD in Git mean?

...it like doing git fetch without arguments (or git remote update), updating all your remote branches, then running git merge origin/<branch>, but using FETCH_HEAD internally instead to refer to whatever single ref was fetched, instead of needing to name things. ...
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Stop Mongoose from creating _id property for sub-document array items

If you have subdocument arrays, Mongoose automatically creates ids for each one. Example: 6 Answers ...
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Inserting multiple rows in mysql

... When loading a table from a text file, use LOAD DATA INFILE. This is usually 20 times faster than using INSERT statements. Optimizing INSERT Statements You can find more tips on how to speed up your insert statements on the link above. ...
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Authorize a non-admin developer in Xcode / Mac OS

... Finally, I was able to get rid of it using DevToolsSecurity -enable on Terminal. Thanks to @joar_at_work! FYI: I'm on Xcode 4.3, and pressed the disable button when it launched for the first time, don't ask why, just assume my ...
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mongodb group values by multiple fields

... $slice just off the basic aggregation result. For "large" results, run parallel queries instead for each grouping ( a demonstration listing is at the end of the answer ), or wait for SERVER-9377 to resolve, which would allow a "limit" to the number of items to $push to an array. db.books.aggregate(...
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Is it alright to use target=“_blank” in HTML5?

I recall reading somewhere that in HTML5 it was no longer okay to use target="_blank" in HTML5, but I can't find it now. ...
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CSS styling in Django forms

...ling, if you need an unique identifier its better to use id. Second its usually the template side's responsobilty to do exaclty this, Esspecially if you are going to access this class via frontend methods (js, css). I didn't say your answer is wrong. In my opinion its just bad practice (esspecially ...