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SQLAlchemy: What's the difference between flush() and commit()?
...e same state as
# Foo('A') was above.
print 3, s2.query(Foo).all()
s2.rollback() # Foo('B') has not been committed, and rolling
# back the session's transaction removes it
# from the session....
A regex to match a substring that isn't followed by a certain other substring
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edited Apr 13 '10 at 16:12
answered Apr 13 '10 at 15:51
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Sample random rows in dataframe
...rnorm(20), nrow=10))
> df
X1 X2
1 0.7091409 -1.4061361
2 -1.1334614 -0.1973846
3 2.3343391 -0.4385071
4 -0.9040278 -0.6593677
5 0.4180331 -1.2592415
6 0.7572246 -0.5463655
7 -0.8996483 0.4231117
8 -1.0356774 -0.1640883
9 -0.3983045 0.7157506
10 -0.9060305 2.3234...
What is the purpose of “!” and “?” at the end of method names?
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edited Aug 28 '11 at 6:39
answered Aug 24 '11 at 16:34
j...
Is 161803398 A 'Special' Number? Inside of Math.Random()
...
No, but it's based on Phi (the "golden ratio").
161803398 = 1.61803398 * 10^8 ≈ φ * 10^8
More about the golden ratio here.
And a really good read for the casual mathematician here.
And I found a research paper on random number generators that agrees with this assertion. ...
How to make join queries using Sequelize on Node.js
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136
User.hasMany(Post, {foreignKey: 'user_id'})
Post.belongsTo(User, {foreignKey: 'user_id'})
Post...
Git submodule push
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139
A submodule is nothing but a clone of a git repo within another repo with some extra meta data ...
Update Item to Revision vs Revert to Revision
...ate"
– Peter Parker
Aug 2 '09 at 10:35
how do update to and revert to/from treat local changes ( uncommitted changes )...
Will Try / Finally (without the Catch) bubble the exception?
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131
Yes, it absolutely will. Assuming your finally block doesn't throw an exception, of course, in ...
Database design for audit logging
...ar(100) NOT NULL,
LastModified datetime NOT NULL,
Comment nvarchar(300) NULL,
Content nvarchar(max) NOT NULL,
Description nvarchar(200) NULL
I would probably make the PK of the contents table a multi-column key from PageID and Revision provided Revision was an identity type. You w...