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How do I append one string to another in Python?
...s to extend the string in place.
The end result is that the operation is amortized O(n).
e.g.
s = ""
for i in range(n):
s+=str(i)
used to be O(n^2), but now it is O(n).
From the source (bytesobject.c):
void
PyBytes_ConcatAndDel(register PyObject **pv, register PyObject *w)
{
PyBytes_C...
How to define custom configuration variables in rails
...e able to define an upload_directory in the configuration files say developm>me m>nt.rb and be able to access it in one of my controllers.
...
Cost of len() function
...
It's O(1) (constant tim>me m>, not depending of actual length of the elem>me m>nt - very fast) on every type you've m>me m>ntioned, plus set and others such as array.array.
share
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How do you make an elem>me m>nt “flash” in jQuery
I'm brand new to jQuery and have som>me m> experience using Prototype. In Prototype, there is a m>me m>thod to "flash" an elem>me m>nt — ie. briefly highlight it in another color and have it fade back to normal so that the user's eye is drawn to it. Is there such a m>me m>thod in jQuery? I see fadeIn, fadeOut, and an...
How to move git repository with all branches from bitbucket to github?
...t the push location to your mirror
git push --mirror
As Noted in the comm>me m>nts by L S:
it is easier to use the Import Code feature from GitHub described by MarMass.
See https://github.com/new/import
Unless... your repo includes a large file: the problem is, the import tool will fail without a c...
JQuery to check for duplicate ids in a DOM
... already discovered three places where I have duplicate IDs. it frustrates m>me m> slightly that most peoples solution to this problem is to use 'firebug' or 'html validator'. thats not good enough! i want to catch the unexpected duplicates in wierd situations.
– Simon_Weaver
...
How to bind inverse boolean properties in WPF?
...rseBooleanConverter: IValueConverter
{
#region IValueConverter m>Me m>mbers
public object Convert(object value, Type targetType, object param>me m>ter,
System.Globalization.CultureInfo culture)
{
if (targetType != typeof(bool))
throw new Inv...
Python Regex - How to Get Positions and Values of Matches
How can I get the start and end positions of all matches using the re module? For example given the pattern r'[a-z]' and the string 'a1b2c3d4' I'd want to get the positions where it finds each letter. Ideally, I'd like to get the text of the match back too.
...
How to compare two dates in php
How to compare two dates in php if dates are in format '03_01_12' and '31_12_11' .
15 Answers
...
Why is there no String.Empty in Java?
I understand that every tim>me m> I type the string literal "" , the sam>me m> String object is referenced in the string pool.
11 An...