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design a stack such that getMinimum( ) should be O(1)
...gh information. It's simple when you grok it, but it might take a bit of head-scratching at first :)
(The downside of course is that it doubles the space requirement. Execution time doesn't suffer significantly though - i.e. it's still the same complexity.)
EDIT: There's a variation which is sligh...
When to add what indexes in a table in Rails
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Should I add "index" to all the foreign keys like "xxx_id"?
It would be better, because it accelerates the search in sorting in this column. And Foreign keys are something searched for a lot.
Since Version 5 of rails the index will...
MySQL, update multiple tables with one query
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underscore_d
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answered Feb 23 '12 at 16:41
IrfanIrfan
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What are the differences between Clojure, Scheme/Racket and Common Lisp?
...ional programming style, although have the ability to accommodate other paradigms
Emphasis in interactive development with a REPL (i.e. you interactively develop in a running instance of the code)
Common Lisp distinctive features:
A powerful OOP subsystem (Common Lisp Object System)
Probably the...
Comparing Java enum members: == or equals()?
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jbatista
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answered Nov 17 '09 at 17:29
Reverend GonzoReverend Gonzo
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How do pointer to pointers work in C?
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Let's assume an 8 bit computer with 8 bit addresses (and thus only 256 bytes of memory). This is part of that memory (the numbers at the top are the addresses):
54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
+----+----+----+----+----...
The difference between fork(), vfork(), exec() and clone()
...ork() is an obsolete optimization. Before good memory management, fork() made a full copy of the parent's memory, so it was pretty expensive. since in many cases a fork() was followed by exec(), which discards the current memory map and creates a new one, it was a needless expense. Nowadays, fork...
Is it necessary to write HEAD, BODY and HTML tags?
Is it necessary to write <html> , <head> and <body> tags?
6 Answers
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What is __main__.py?
...like python my_program.py, the script will run as the __main__ module instead of the my_program module. This also happens for modules run as python -m my_module, or in several other ways.
If you saw the name __main__ in an error message, that doesn't necessarily mean you should be looking for a __m...
How to change past commit to include a missed file?
I have committed a change and forgot to add a file to the change set. After other commits, I realized the file is now missing from a HEAD^4 commit.
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