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Animate change of view controllers without using navigation controller stack, subviews or modal cont
...different view must occur with views at least a level below the first view added to the window (e.g. window.rootViewController.view.anotherView).
I've implemented a simple container class I called TransitionController. You can find it at https://gist.github.com/1394947.
As an aside, I prefer the i...
Getters \ setters for dummies
I've been trying to get my head around getters and setters and its not sinking in. I've read JavaScript Getters and Setters and Defining Getters and Setters and just not getting it.
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Gradle to execute Java class (without modifying build.gradle)
There is simple Eclipse plugin to run Gradle, that just uses command line way to launch gradle.
4 Answers
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Efficiently updating database using SQLAlchemy ORM
...me to flush the changes to the database, update the rows one by one.
Instead you should do this:
session.execute(update(stuff_table, values={stuff_table.c.foo: stuff_table.c.foo + 1}))
session.commit()
This will execute as one query as you would expect, and because at least the default session c...
Why doesn't Python have a sign function?
...other value. And of course that's basically what copysign does.
So, instead of:
s = sign(a)
b = b * s
You can just do:
b = copysign(b, a)
And yes, I'm surprised you've been using Python for 7 years and think cmp could be so easily removed and replaced by sign! Have you never implemented a c...
gunicorn autoreload on source change
...s old question you need to know that ever since version 19.0 gunicorn has had the --reload option.
So now no third party tools are needed.
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How to implement an STL-style iterator and avoid common pitfalls?
I made a collection for which I want to provide an STL-style, random-access iterator. I was searching around for an example implementation of an iterator but I didn't find any. I know about the need for const overloads of [] and * operators. What are the requirements for an iterator to be "STL-s...
Can I arrange repositories into folders on Github?
I am new to git and what I am doing now is to upload all my recent projects as repositories to github. There are a lot of different projects like webdesign, wordpress themes and different types of applications. And some of these also belong to bigger projects because they were about testing some stu...
How to extract the decision rules from scikit-learn decision-tree?
... good idea. What if it's a real decision node with a threshold of -2? Instead, you should look at tree.feature or tree.children_*.
The line features = [feature_names[i] for i in tree_.feature] crashes with my version of sklearn, because some values of tree.tree_.feature are -2 (specifically for leaf...
IN vs OR in the SQL WHERE Clause
...1.7385 seconds)
So in this case the method using OR is about 30% slower. Adding more terms makes the difference larger. Results may vary on other databases and on other data.
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