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Can (domain name) subdomains have an underscore “_” in it?
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Most answers given here are false. It is perfectly legal to have
an underscore in a domain name. Let me quote the standard, RFC
2181, section 11, "Name syntax":
The DNS itself places only one restriction on the particular labels
that can be used to ident...
How to call a SOAP web service on Android [closed]
... finding good information on how to call a standard SOAP/WSDL web service with Android. All I've been able to find are either very convoluted documents and references to "kSoap2" and then some bit about parsing it all manually with SAX . OK, that's fine, but it's 2008, so I figured there should be ...
How to sort in-place using the merge sort algorithm?
...rst, naive in-place merge such as described here isn't the right solution. It downgrades the performance to O(N2).
The idea is to sort part of the array while using the rest as working area for merging.
For example like the following merge function.
void wmerge(Key* xs, int i, int m, int j, int...
Mediator Vs Observer Object-Oriented Design Patterns
...many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.
The Mediator pattern:
Define an object that encapsulates how a set of objects interact. Mediator promotes loose coupling by keeping objects from referring to each other...
How to get the current time in Python
...follow
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edited Oct 29 '19 at 17:00
RTHarston
36922 silver badges1212 bronze badges
answe...
What is JSONP, and why was it created?
.... Wikipedia's document on JSON is (was) the top search result for JSONP. It says this:
10 Answers
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What exactly does git's “rebase --preserve-merges” do (and why?)
Git's documentation for the rebase command is quite brief:
2 Answers
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What is the difference between LR, SLR, and LALR parsers?
...xactly the same table-driven machinery.
Fundamentally, the parsing algorithm collects the next input token T, and consults the current state S (and associated lookahead, GOTO, and reduction tables) to decide what to do:
SHIFT: If the current table says to SHIFT on the token T, the pair (S,T) is...
Why is require_once so bad to use?
...luded/required. Every *_once call means checking that log. So there's definitely some extra work being done there but enough to detriment the speed of the whole app?
... I really doubt it... Not unless you're on really old hardware or doing it a lot.
If you are doing thousands of *_once, you coul...
What makes Lisp macros so special?
.... Let's invoke our suspension of disbelief and pretend Lisp has a very limited loop macro that just does iteration and no easy way to do the equivalent of list comprehensions.
In Lisp you could write the following. I should note this contrived example is picked to be identical to the Python co...