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iOS Detection of Screenshot?
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This does not work to prevent a screenshot from being taken. It can only let the app know that one was taken.. From the UIApplication Class Reference: UIApplicationUserDidTakeScreenshotNotification Posted when the user presses the Home and Lock buttons to take a scre...
HTML: Include, or exclude, optional closing tags?
...not contain block-level elements, and <P> is a block level element. From (w3.org/TR/REC-html40/struct/text.html#edef-P) "The P element represents a paragraph. It cannot contain block-level elements (including P itself)."
– Ian Boyd
Jun 9 '10 at 20:25
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Understanding dispatch_async
...to run tasks in the background.
For instance, if I am downloading a file from the internet and I want to update the user on the progress of the download, I will run the download in the priority default queue and update the UI in the main queue asynchronously.
dispatch_async(dispatch_get_global_qu...
What is the difference between origin and upstream on GitHub?
...your fork: your own repo on GitHub, clone of the original repo of GitHub
From the GitHub page:
When a repo is cloned, it has a default remote called origin that points to your fork on GitHub, not the original repo it was forked from.
To keep track of the original repo, you need to add anothe...
What is the difference between syntax and semantics in programming languages?
...rinted on each one. The rightmost wheel rotates the fastest; when it wraps from 9 back to zero, the wheel to its immediate left advances by one. When this wheel advances from 9 to 0, the one to its left advances, and so on.
– Jeff N
Jul 29 '13 at 19:20
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What is the pythonic way to avoid default parameters that are empty lists?
...he right tool depends on the case — a varargs function is very different from one that takes an (optional) list argument. Situations where you'd have to choose between them come up less often than you'd think. Varargs is great when the arg count changes, but is fixed when the code is WRITTEN. Like...
How to remove leading and trailing zeros in a string? Python
... is also a general solution that strips both leading and trailing elements from an iterable:
Code
import more_itertools as mit
iterables = ["231512-n\n"," 12091231000-n00000","alphanum0000", "00alphanum"]
pred = lambda x: x in {"0", "\n", " "}
list("".join(mit.strip(i, pred)) for i in iterables...
How to install 2 Anacondas (Python 2 and 3) on Mac OS
...PATH, so that when you type python at the terminal it will load the Python from that environment.
If you don't want all of Anaconda, you can replace anaconda in the command above with whatever packages you want. You can use conda to install packages in that environment later, either by using the -...
How to search through all Git and Mercurial commits in the repository for a certain string?
...reflogs
Instead of walking the commit ancestry chain, walk reflog entries from
the most recent one to older ones.
So you could do this to find a particular string in a commit message that is dangling:
git log -g --grep=search_for_this
Alternatively, if you want to search the changes for a pa...
Html.RenderPartial() syntax with Razor
...a method that returns such a string with just a @ prefix to distinguish it from plain HTML you have on the page.
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