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What's the difference between “Architectures” and “Valid Architectures” in Xcode Build Settings?
What's the meaning of them and can I set them in different values?
2 Answers
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difference between offsetHeight and clientHeight
In the javascript dom - what is the difference between offsetHeight and clientHeight of an element?
2 Answers
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Get time difference between two dates in seconds
...he explanation
You need to call the getTime() method for the Date objects, and then simply subtract them and divide by 1000 (since it's originally in milliseconds). As an extra, when you're calling the getDate() method, you're in fact getting the day of the month as an integer between 1 and 31 (not ...
Why doesn't Java support unsigned ints?
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This is from an interview with Gosling and others, about simplicity:
Gosling: For me as a language designer, which I don't really count myself as these days, what "simple" really ended up meaning was could I expect J. Random Developer to hold the spec in his h...
Are lists thread-safe?
...t is often suggested to use queues with multiple threads, instead of lists and .pop() . Is this because lists are not thread-safe, or for some other reason?
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How do I clone a GitHub wiki?
...thub.com:myusername/foobar.git would be the path to clone your repository
and
git clone git@github.com:myusername/foobar.wiki.git would be the path to clone its wiki.
Note: You must have at least one page to be able to clone the wiki repo. (via @tobiasz-cudnik)
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Rails: around_* callbacks
...api.rubyonrails.org/classes/ActiveRecord/Callbacks.html , but don't understand when the around_* callbacks are triggered in relation to before_* and after_* .
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Example for sync.WaitGroup correct?
...rrect? It gives the expected result, but I am unsure about the wg.Add(4) and the position of wg.Done() . Does it make sense to add the four goroutines at once with wg.Add() ?
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Is there a way to follow redirects with command line cURL?
...f the commenters.
For me, the obstacle was that the page required a login and then gave me a new URL through javascript. Here is what I had to do:
curl -c cookiejar -g -O -J -L -F "j_username=yourusename" -F "j_password=yourpassword" <URL>
Note that j_username and j_password is the name of...
Iterate a list with indexes in Python
...ve seen the function (or method) that takes a list, like this [3, 7, 19] and makes it into iterable list of tuples, like so: [(0,3), (1,7), (2,19)] to use it instead of:
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