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Python - abs vs fabs
...n [1]: %timeit abs(5)
10000000 loops, best of 3: 86.5 ns per loop
In [2]: from math import fabs
In [3]: %timeit fabs(5)
10000000 loops, best of 3: 115 ns per loop
In [4]: %timeit abs(-5)
10000000 loops, best of 3: 88.3 ns per loop
In [5]: %timeit fabs(-5)
10000000 loops, best of 3: 114 ns per lo...
How to use regex with find command?
...-regex find expression matches the whole name, including the relative path from the current directory. For find . this always starts with ./, then any directories.
Also, these are emacs regular expressions, which have other escaping rules than the usual egrep regular expressions.
If these are all ...
How to Get the Title of a HTML Page Displayed in UIWebView?
I need to extract the contents of the title tag from an HTML page displayed in a UIWebView. What is the most robust means of doing so?
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What does `kill -0 $pid` in a shell script do?
...at signal does '0' represent, because here I see SIGNAL numbers starting from 1.
6 Answers
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What's the best way to communicate between view controllers?
... reusable. And if you think about where the Stanford presenters are coming from (i.e., as Apple employees their job is to build classes that can easily be reused), reusability and modularity are high priorities. All of the best practices they mention for sharing data are part of dependency injection...
How to extract numbers from a string in Python?
...llo 42 I\'m a 32 string 30')
['42', '32', '30']
This would also match 42 from bla42bla. If you only want numbers delimited by word boundaries (space, period, comma), you can use \b :
>>> re.findall(r'\b\d+\b', 'he33llo 42 I\'m a 32 string 30')
['42', '32', '30']
To end up with a list o...
Using Regular Expressions to Extract a Value in Java
...hed expression
System.out.println(m.group(1)); // first expression from round brackets (Testing)
System.out.println(m.group(2)); // second one (123)
System.out.println(m.group(3)); // third one (Testing)
}
}
Since you're looking for the first number, you can use such re...
Is there any kind of hash code function in JavaScript?
...mber + total ticks - then have a set of functions to add/remove the object from the array.
– Sugendran
Oct 12 '08 at 0:52
4
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Can I read the hash portion of the URL on my server-side application (PHP, Ruby, Python, etc.)?
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It is retrievable from Javascript - as window.location.hash. From there you could send it to the server with Ajax for example, or encode it and put it into URLs which can then be passed through to the server-side.
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How can I count the occurrences of a list item?
... 3.x and you want the number of occurrences for each element:
>>> from collections import Counter
>>> z = ['blue', 'red', 'blue', 'yellow', 'blue', 'red']
>>> Counter(z)
Counter({'blue': 3, 'red': 2, 'yellow': 1})
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