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Differences in boolean operators: & vs && and | vs ||
I know the rules for && and || but what are & and | ? Please explain these to me with an example.
11 Ans...
Inline functions in C#?
How do you do "inline functions" in C#? I don't think I understand the concept. Are they like anonymous methods? Like lambda functions?
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What does “hashable” mean in Python?
...ue which never changes during its lifetime (it needs a __hash__() method), and can be compared to other objects (it needs an __eq__() or __cmp__() method). Hashable objects which compare equal must have the same hash value.
Hashability makes an object usable as a dictionary key and a set member...
data.table vs dplyr: can one do something well the other can't or does poorly?
...able , not so much with dplyr . I've read through some dplyr vignettes and examples that have popped up on SO, and so far my conclusions are that:
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Is it possible to get the iOS 5.1 SDK for Xcode 4.2 on Snow Leopard?
...d. I have Xcode 4.2 for iOS development. This morning I upgraded my iPhone and iPad to iOS 5.1.
15 Answers
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Listing and deleting Git commits that are under no branch (dangling?)
...up by git gc.
Expiry is regulated by the gc.pruneexpire, gc.reflogexpire, and gc.reflogexpireunreachable settings. Cf. git help config.
The defaults are all quite reasonable.
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Where is array's length property defined?
... method clone, which overrides the method of the same name in class Object and throws no checked exceptions. The return type of the clone method of an array type T[] is T[].
A clone of a multidimensional array is shallow, which is to say that it creates only a single new array. Subarrays are sh...
What is the difference between ports 465 and 587?
These ports 465 and 587 are both used for sending mail (submitting mail) but what is the real difference between them?
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Automatically start forever (node) on system restart
...r those cases when the system gets rebooted. If the server is shutted down and then powered on - this cron job won't execute.
– ecdeveloper
May 17 '13 at 11:25
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What is the difference between 'E', 'T', and '?' for Java generics?
...the Java programming language
Angelika Langer's Java Generics FAQ (massive and comprehensive; more for reference though)
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