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What are the mathematical/computational principles behind this game?
My kids have this fun game called Spot It! The game constraints (as best I can describe) are:
9 Answers
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Django Forms: if not valid, show form with error message
...ee. I return the same form that I got in. The error messages have automatically been added to it by the is_valid() function.
– user984003
Feb 1 '13 at 13:57
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What is the difference between a generative and a discriminative algorithm?
...|x) - which you should read as "the probability of y given x".
Here's a really simple example. Suppose you have the following data in the form (x,y):
(1,0), (1,0), (2,0), (2, 1)
p(x,y) is
y=0 y=1
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x=1 | 1/2 0
x=2 | 1/4 1/4
p(y|x) is
y=0 y=1
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What is the difference between `after_create` and `after_save` and when to use which?
... readers should note that, according to the docs, ActiveRecord's update_all does not invoke any callbacks, including after_*
– user2426679
Jan 10 at 19:34
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What's the state of the art in email validation for Rails?
... answered Aug 24 '10 at 9:56
HallelujahHallelujah
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GLib compile error (ffi.h), but libffi is installed
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If you have a Debian-based Linux OS with apt-get:
sudo apt-get install libffi-dev
With a Redhat-base OS:
yum install libffi-devel
With Alpine Linux:
apk add libffi-dev
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Why is IntelliJ 13 IDEA so slow after upgrading from version 12?
While using IntelliJ 13 ultimate edition for a week, it just seems really slow.
20 Answers
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Match multiline text using regular expression
...erwise they only match at the start/end of the entire string).
Pattern.DOTALL or (?s) tells Java to allow the dot to match newline characters, too.
Second, in your case, the regex fails because you're using the matches() method which expects the regex to match the entire string - which of course d...
How to pass object with NSNotificationCenter
...when you do the addObserver(). The receiveTestNotification should only be called when observing a specific notification.
– Johan Karlsson
Feb 17 '16 at 15:06
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How do I adjust the anchor point of a CALayer, when Auto Layout is being used?
... is applied.]
Autolayout vs. View Transforms
Autolayout does not play at all well with view transforms. The reason, as far as I can discern, is that you're not supposed to mess with the frame of a view that has a transform (other than the default identity transform) - but that is exactly what auto...