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Speed comparison with Project Euler: C vs Python vs Erlang vs Haskell
...sults in no change though (the compiler is smart, lucky for you).
You used mod where rem is faster and sufficient. This changes the time to 8.5 seconds.
factorCount' is constantly applying two extra arguments that never change (number, sqrt). A worker/wrapper transformation gives us:
$ time ./so...
How do you calculate the average of a set of circular data? [closed]
...e as "what is the argument of c, such that cc == ab", where a and b have a modulus of 1, then the average of 0 and 180 is 90.
– David Hanak
Jan 29 '09 at 14:42
3
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Mercurial - all files that changed in a changeset?
...question is for a single changeset, but if you'd like to get all the files modified for a range of changesets, you can do
hg status --rev 1 --rev 10 -m
share
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Autoreload of modules in IPython [duplicate]
...ng IPython and SciPy and it's quite a pain to have to manually reload each module whenever I change it.
6 Answers
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Can you add new statements to Python's syntax?
... do here, really, is gain some insight into the inner workings of Python.
Modifying the grammar
Python uses a custom parser generator named pgen. This is a LL(1) parser that converts Python source code into a parse tree. The input to the parser generator is the file Grammar/Grammar[1]. This is a s...
The smallest difference between 2 Angles
...targetA - sourceA
a = (a + 180) % 360 - 180
Beware in many languages the modulo operation returns a value with the same sign as the dividend (like C, C++, C#, JavaScript, full list here). This requires a custom mod function like so:
mod = (a, n) -> a - floor(a/n) * n
Or so:
mod = (a, n) -&g...
How to list all methods for an object in Ruby?
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Module#instance_methods
Returns an array containing the names of the public and protected instance methods in the receiver. For a module, these are the public and protected methods; for a class, they are the instance (not...
How to succinctly write a formula with many variables from a data frame?
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d <- data.frame(y = y, x1 = c(4,-1,3), x2 = c(3,9,8), x3 = c(4,-4,-2))
mod <- lm(y ~ ., data = d)
You can also do things like this, to use all variables but one (in this case x3 is excluded):
mod <- lm(y ~ . - x3, data = d)
Technically, . means all variables not already mentioned in t...
Python: reload component Y imported with 'from X import Y'?
In Python, once I have imported a module X in an interpreter session using import X , and the module changes on the outside, I can reload the module with reload(X) . The changes then become available in my interpreter session.
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CodeIgniter removing index.php from url
... this file
index.php
Step:-3 Write below code in .htaccess file
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.*)$ index.php/$1 [L]
</IfModule>
Step:-4 In some case the default setting for uri_protoco...