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CSS styling in Django forms
..."class":css})
Put this in your app's templatetags/ folder and you can now do
{{field|addcss:"form-control"}}
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Mapping over values in a python dictionary
... that's because rather than look up all key-value pairs in one go, you are now using number-of-keys times my_dictionary.__getitem__ calls.
– Martijn Pieters♦
Oct 15 '14 at 15:21
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Flask-SQLalchemy update a row's information
...esd_at = db.Column(db.DateTime) I just run obj.used_at = datetime.datetime.now() db.session.commit() But not value set to the field.
– Rukeith
Oct 30 '18 at 3:51
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Installing libv8 gem on OS X 10.9+
...f libv8 in the project I'm working on. I'll be downgrading to OSX 10.8 for now!
– tanookiben
Oct 25 '13 at 19:41
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How does Apple know you are using private API?
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There are 3 ways I know. These are just some speculation, since I do not work in the Apple review team.
1. otool -L
This will list all libraries the app has linked to. Something clearly you should not use, like IOKit and WebKit can be detected...
Eclipse: Enable autocomplete / content assist
...s the following:
abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ._
Now any time that you type any of these characters, Eclipse will trigger autocomplete suggestions based on the context.
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How do you reference a capture group with regex find and replace in Visual Studio 2012, 2013, 2015,
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To be more general, VS2012 now uses the standard .Net regex engine.
– SLaks
Jun 19 '13 at 14:33
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Best way to give a variable a default value (simulate Perl ||, ||= )
... = $bar ?: $baz;
Which assigns $bar if it's not an empty value (I don't know how this would be different in PHP from Perl), otherwise $baz, and is the same as this in Perl and older versions of PHP:
$foo = $bar ? $bar : $baz;
But PHP does not have a compound assignment operator for this (that i...
json.dumps vs flask.jsonify
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jsonify() handles lists now. See this commit.
– Jeff Widman
Jan 25 '16 at 19:14
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What is the most effective way for float and double comparison?
...the order of operations can produce different results, it is important to know how "equal" you want the numbers to be.
Comparing floating point numbers by Bruce Dawson is a good place to start when looking at floating point comparison.
The following definitions are from The art of computer progr...