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Difference between Big-O and Little-O Notation
... O(g) says, essentially
For at least one choice of a constant k > 0, you can find a constant a such that the inequality 0 <= f(x) <= k g(x) holds for all x > a.
Note that O(g) is the set of all functions for which this condition holds.
f ∈ o(g) says, essentially
For every c...
How do I set the version information for an existing .exe, .dll?
...set!
– twasbrillig
Nov 18 '14 at 22:09
2
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How does the algorithm to color the song list in iTunes 11 work? [closed]
...
+50
I approximated the iTunes 11 color algorithm in Mathematica given the album cover as input:
How I did it
Through trial and error...
What is the best way to programmatically detect porn images? [closed]
...
This was written in 2000, not sure if the state of the art in porn detection has advanced at all, but I doubt it.
http://www.dansdata.com/pornsweeper.htm
PORNsweeper seems to have some ability to distinguish pictures of people from pictures of t...
Show data on mouseover of circle
...
answered May 29 '12 at 20:25
Lars KotthoffLars Kotthoff
98.3k1313 gold badges176176 silver badges180180 bronze badges
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Calling shell functions with xargs
...orting the function should do it (untested):
export -f echo_var
seq -f "n%04g" 1 100 | xargs -n 1 -P 10 -I {} bash -c 'echo_var "$@"' _ {}
You can use the builtin printf instead of the external seq:
printf "n%04g\n" {1..100} | xargs -n 1 -P 10 -I {} bash -c 'echo_var "$@"' _ {}
Also, using ret...
Capitalize only first character of string and leave others alone? (Rails)
... that the only letter changed is the first one.
new_string = string.slice(0,1).capitalize + string.slice(1..-1)
Update:
irb(main):001:0> string = "i'm from New York..."
=> "i'm from New York..."
irb(main):002:0> new_string = string.slice(0,1).capitalize + string.slice(1..-1)
=> "I'm ...
Is there a way to measure how sorted a list is?
...onsider the example sequence 9, 5, 7, 6. This sequence has the inversions (0,1), (0,2), (0,3), (2,3) and the inversion number 4.
If you want a value between 0 and 1, you can divide the inversion number by N choose 2.
To actually create an algorithm to compute this score for how sorted a list is, you...
Is there an expression for an infinite generator?
...gument iter = zero-argument callable + sentinel value
int() always returns 0
Therefore, iter(int, 1) is an infinite iterator. There are obviously a huge number of variations on this particular theme (especially once you add lambda into the mix). One variant of particular note is iter(f, object()),...
Formatting “yesterday's” date in python
...
406
Use datetime.timedelta()
>>> from datetime import date, timedelta
>>> yester...