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How to set a Django model field's default value to a function call / callable (e.g., a date relative

... 143 The question is misguided. When creating a model field in Django, you are not defining a func...
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Upload failed You need to use a different version code for your APK because you already have one wit

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On design patterns: When should I use the singleton?

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Which is more efficient, a for-each loop, or an iterator?

...All iterators have as a fundamental requirement that next() should be an O(1) operation, making the loop O(n). To verify that the iterator is used underwater by the new for loop syntax, compare the generated bytecodes from the following two Java snippets. First the for loop: List<Integer> a...
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Why sizeof int is wrong, while sizeof(int) is right?

... 101 The following could be ambiguous: sizeof int * + 1 Is that (sizeof (int*)) + 1, or (sizeof(...
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FragmentPagerAdapter Exists Only In Android.Support.V4.App (and not Android.App)

... There is one that is in android.support.v13.app.FragmentPagerAdapter, which should do what you want it to do. It's a FragmentPagerAdapter for non-support fragments. Android Studio Installation Please add follow Gradle dependencies dependencies { compile 'com....
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What is the difference between async.waterfall and async.series

... 169 It appears that async.waterfall allows each function to pass its results on to the next functi...
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Least common multiple for 3 or more numbers

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How can I filter a date of a DateTimeField in Django?

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Rails: fields_for with index?

...years ago, for a modern approach see: https://stackoverflow.com/a/22640703/105403 This would actually be a better approach, following Rails documentation more closely: <% @questions.each.with_index do |question,index| %> <% f.fields_for :questions, question do |fq| %> # he...