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Statistics: combinations in Python
... +1 for suggesting to write something simple, for using reduce, and for the cool demo with pascal triangle
– jon_darkstar
Nov 8 '10 at 15:32
6
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What can I do with a moved-from object?
Does the standard define precisely what I can do with an object once it has been moved from? I used to think that all you can do with a moved-from object is do destruct it, but that would not be sufficient.
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How can I create a unique constraint on my column (SQL Server 2008 R2)?
I have SQL Server 2008 R2 and I want to set a unique column.
4 Answers
4
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git - diff of current changes before committing
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git diff by default shows difference between your working directory and the index (staging area for the next commit).
If you have already added (staged) the changes to the staging area, git diff --staged does the job. Staging area is the data from which the next commit will be formed by git...
How to loop through files matching wildcard in batch file
...t of base filenames, for each name 'f' there are exactly two files, 'f.in' and 'f.out'. I want to write a batch file (in Windows XP) which goes through all the filenames, for each one it should:
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Understanding :source option of has_one/has_many through of Rails
Please help me in understanding the :source option of has_one/has_many :through association. The Rails API explanation makes very little sense to me.
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Is there a query language for JSON?
... work in progress, but work to some degree. They are also similar to XPath and XQuery conceptually; even though XML and JSON have different conceptual models (hierarchic vs object/struct).
EDIT Sep-2015: Actually there is now JSON Pointer standard that allows very simple and efficient traversal of ...
Create dynamic URLs in Flask with url_for()
...Just so that it is clearer, if you have @app.route("/<a>/<b>") and def function(a,b): ... as its function, then you should use url_for and specify its keyword arguments like this: url_for('function', a='somevalue', b='anothervalue')
– jarrettyeo
May...
git -> show list of files changed in recent commits in a specific directory
In Subversion svn log is the command to display commit log messages -- for details see the online manual at http://svnbook.red-bean.com/en/1.7/svn.ref.svn.c.log.html
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Use jQuery to change an HTML tag?
...s many elements in as many ways...
Example usage:
keep existing class and attributes:
$('div#change').replaceTag('<span>', true);
or
Discard existing class and attributes:
$('div#change').replaceTag('<span class=newclass>', false);
or even
r...