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Algorithm to generate all possible permutations of a list?
....wikipedia.org/wiki/Permutation#/media/File:Permutations_RGB.svg - https://commons.wikimedia.org/wiki/File:Permutations_RGB.svg)
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How to plot two histograms together in R?
... you've been reading on ggplot then maybe the only thing you're missing is combining your two data frames into one long one.
So, let's start with something like what you have, two separate sets of data and combine them.
carrots <- data.frame(length = rnorm(100000, 6, 2))
cukes <- data.frame(...
Can someone copyright a SQL query? [closed]
...ort a list of students from our student management system and send it to a company that handles our online exams.
72 Answer...
Update ViewPager dynamically?
...r destroys a fragment after it's been displayed the first time.
I don't recommend the setTag() and findViewWithTag() workaround provided in the post you linked. As you've discovered, using setTag() and findViewWithTag() doesn't work with fragments, so it's not a good match.
The right solution is t...
Django migration strategy for renaming a model and relationship fields
...go 2.0 if you change your model name, the ./manage.py makemigrations myapp command will ask you if you renamed your model. E.g.: Did you rename the myapp.Foo model to Bar? [y/N] If you answer 'y' your migration will contain the migration.RenameModel('Foo', 'Bar') Same counts for the renamed fields ...
How to have stored properties in Swift, the same way I had on Objective-C?
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Why is there no multiple inheritance in Java, but implementing multiple interfaces is allowed?
...ss, you have to override this method in the class itself, see: docs.oracle.com/javase/tutorial/java/IandI/…
– bobbel
May 14 '14 at 12:29
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How can I check for “undefined” in JavaScript? [duplicate]
...guaranteed to return a string:
if (typeof myVar !== 'undefined')
Direct comparisons against undefined are troublesome as undefined can be overwritten.
window.undefined = "foo";
"foo" == undefined // true
As @CMS pointed out, this has been patched in ECMAScript 5th ed., and undefined is non-wr...
What is the standard Python docstring format? [closed]
...rmation about the main formats in this blog post.
Note that the reST is recommended by the PEP 287
There follows the main used formats for docstrings.
- Epytext
Historically a javadoc like style was prevalent, so it was taken as a base for Epydoc (with the called Epytext format) to generate docu...
What exactly do “u” and “r” string flags do, and what are raw string literals?
...ich a backslash, \, is taken as meaning "just a backslash" (except when it comes right before a quote that would otherwise terminate the literal) -- no "escape sequences" to represent newlines, tabs, backspaces, form-feeds, and so on. In normal string literals, each backslash must be doubled up to ...