Qzerty's Weblog

vedenza

qzerty — Sat, 29 Aug 2009 19:49:49 +0000

>>> def pair(x, y): return lambda f: f(x,y)
...
>>> def first(z): return z(lambda x, y: x)
...
>>> def second(z): return z(lambda x, y: y)
...
>>> t = pair('foo', 'bar')
>>> first(t)
'foo'
>>> second(t)
'bar'
>>>

shamelessly copied and ported from scheme

Leaking abstractions

qzerty — Tue, 12 May 2009 15:09:22 +0000

x[:] : x[::-1] = x[1:-1] : x[len(x)-2:0:-1]

Tertium datur

qzerty — Wed, 17 Sep 2008 15:44:53 +0000

if (a) {
  [...]
}
else if (!a) {
  [...]
}
else {
  [...]
}

HTTP Errors Explained

qzerty — Wed, 28 May 2008 11:37:49 +0000

Lesson 1: Error 404 is clearly illustrated here.

Understanding recursion, part 2

qzerty — Wed, 23 Apr 2008 12:44:16 +0000

Recursion is not always direct, it can also be mutual.

Understanding recursion

qzerty — Wed, 23 Apr 2008 09:15:11 +0000

In order to understand recursion, one must first understand recursion.