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How can I know which parts in the code are never used?
..., the dead code is necessarily within the unreached code... and so you can start from here.
If you are extremely interested in the subject, and have the time and inclination to actually work out a tool by yourself, I would suggest using the Clang libraries to build such a tool.
Use the Clang lib...
How do I find Waldo with Mathematica?
... many ideas. The other speculative answer suggests a general method (as a starting point) that has been used in the past for similar problems, and there's a good amount of literature on it. Just trying to explain what happened.
– Szabolcs
Jan 12 '12 at 10:49
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How do I check if there are duplicates in a flat list?
...list, with the first dupe occurring anywhere in a 1m element list from the start to the middle. It was surprising how little overhead the sort step added. Your mileage may vary, but here are my specific timed results:
Finding FIRST duplicate, single dupe places "n" elements in to 1m element array...
How do Python functions handle the types of the parameters that you pass in?
...is one of the greatest features in Python ever. I can't wait for people to start harnessing the power of it. Sorry for the long answer, but this is what happens when I get excited.
An example of Python code which heavily uses type hinting can be found here.
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Explain which gitignore rule is ignoring my file
...ead, I realised it would not be too much work to do it properly, so I have started work on a patch and hope to have it finished in the next day or two. I will update this answer when it is ready.
UPDATE: Wow, that was a lot harder than I expected. The innards of git's exclude handling are quite c...
How to navigate through a vector using iterators? (C++)
...gs
int n = 3; // nth element to be found.
int i = 0; // counter.
// now start at from the beginning
// and keep iterating over the element till you find
// nth element...or reach the end of vector.
for(it = myvector.begin(); it != myvector.end(); it++,i++ ) {
// found nth element..print an...
Why is list initialization (using curly braces) better than the alternatives?
...s to it. How can you know if you don't encounter such classes? What if you start without std::initializer_list<Foo> constructor, but it is going to be added to the Foo class at some point to extend its interface? Then users of Foo class are screwed up.
– doc
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How can I use Autolayout to set constraints on my UIScrollview?
...all of the scrollable content has a set width and is pinned on all sides.
Start a new project
It can be just a single view application.
Storyboard
In this example we will make a horizontal scroll view. Select the View Controller and then choose Freeform in the Size Inspector. Make the width 1,000 a...
Apply multiple functions to multiple groupby columns
..., I got it to work with df['A'].ix[g.index][df['C'] < 0].sum(). This is starting to get pretty messy, though--I think for readability manual looping may be preferable, plus I'm not sure there's a way to give it my preferred name in the agg argument (instead of <lambda>). I'll hold out hope ...
Read an Excel file directly from a R script
... best (in a few simple situations).
I myself have been using xlsx since I started using R, for inertia if nothing else, and I recently noticed there doesn't seem to be any objective information about which package works better.
Any benchmarking exercise is fraught with difficulties as some package...