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Is there a practical use for weak references? [duplicate]
...d retain Soft References when it can.
There is another kind of reference called a Phantom Reference. This is used in the GC clean up process and refers to an object which isn't accessible to "normal" code because its in the process of being cleaned up.
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Maintain the aspect ratio of a div with CSS
... an example where the .stretchy-wrap.onethird padding-bottom of 25% is actually 25% of the parent width. Can someone explain this?
– Misterparker
Feb 8 '13 at 15:53
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How do I embed a single file from a GitHub gist with the new gist interface?
...tHub Gist interface has one embed snippet for the entire gist which embeds all files in the gist. The old interface had embed code for each file in the gist. Anyone know if there's a trick to embed a single file?
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How to convert a selection to lowercase or uppercase in Sublime Text
...eral strings selected in a file in Sublime Text and I want to convert them all to lowercase.
5 Answers
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Does JSON syntax allow duplicate keys in an object?
...o according to the specification I would safely assume that means they are allowed.
That most implementations of JSON libraries do not accept duplicate keys does not conflict with the standard, because of the first quote.
Here are two examples related to the C++ standard library. When deserializin...
pinpointing “conditional jump or move depends on uninitialized value(s)” valgrind message
... use of uninitialised data in a way that might affect your program's externally-visible behaviour.
From the Valgrind FAQ:
As for eager reporting of copies of uninitialised memory values, this has been suggested multiple times. Unfortunately, almost all programs legitimately copy uninitialised ...
Android Fragments: When to use hide/show or add/remove/replace?
...n detached from the window so it's no longer visible. So you could technically still interact with the fragment and reattach its UI later you need to. If you replace the fragment, the you are actually pulling it out of the container and it will go through all of the teardown events in the lifecycl...
Test a weekly cron job [closed]
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This really shouldn't have been upvoted and accepted, beyond running the script it does nothing to tell you whether the script will actually work when run from cron. Use the excellent crontest script in one of the other answers to t...
How to unzip a list of tuples into individual lists? [duplicate]
...l))
[(1, 3, 8), (2, 4, 9)]
The zip() function pairs up the elements from all inputs, starting with the first values, then the second, etc. By using *l you apply all tuples in l as separate arguments to the zip() function, so zip() pairs up 1 with 3 with 8 first, then 2 with 4 and 9. Those happen t...
Parsing JSON with Unix tools
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There are a number of tools specifically designed for the purpose of manipulating JSON from the command line, and will be a lot easier and more reliable than doing it with Awk, such as jq:
curl -s 'https://api.github.com/users/lambda' | jq -r '.name'
You can...