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How to output git log with the first line only?
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The first line of a commit message is meant to be a short description. If you cannot make it in a single line you can use several, but git considers everything before the first empty line to be the "short description". oneline prints the whole short description, so all your 3 rows.
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How to read a file without newlines?
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temp = [line[:-1] for line in file]
Note: this last solution only works if the file ends with a newline, otherwise the last line will lose a character.
This assumption is true in most cases (especially for files created by text editors, which often do add an ending newline anyway).
If you want ...
Rails has_and_belongs_to_many migration
...rom the docs:
There is also a generator which will produce join tables if JoinTable
is part of the name:
Your migration file (note the :id => false; it's what prevents the creation of a primary key):
Rails 3
class CreateRestaurantsUsers < ActiveRecord::Migration
def self.up
c...
No @XmlRootElement generated by JAXB
...ires certain information in order to marshal/unmarshal a given object, specifically the XML element name and namespace. You can't just pass any old object to the Marshaller. @XmlRootElement provides this information.
The annotation is just a convenience, however - JAXB does not require it. The alte...
ReSharper warns: “Static field in generic type”
...>.Foo); // 20
}
}
As you can see, Generic<string>.Foo is a different field from Generic<object>.Foo - they hold separate values.
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Is PHP's count() function O(1) or O(n) for arrays?
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@Matt It's checking if hash structure is valid, as I can see. It's defined in zend_hash.c and it's O(1) also.
– Vladislav Rastrusny
Apr 29 '11 at 18:09
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Android - Launcher Icon Size
... that they can then scale the icon down to whatever size they need on the different positions of the app and website, without causing pixelation.
– edwoollard
Jan 11 '14 at 13:53
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Efficiency of purely functional programming
...system.
There are a few caveats to be made about this paper. The most significant is that it does not address lazy functional languages, such as Haskell. Bird, Jones and De Moor [1997] demonstrate that the problem constructed by Pippenger can be solved in a lazy functional language in O(n) time, bu...
How to print third column to last column?
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Note that this only works if the delimiter is exactly the same between all columns... For example, you can't use cut with a delimiter like \d+. (That I know of.)
– Zach Wily
Jan 13 '10 at 21:11
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The object cannot be deleted because it was not found in the ObjectStateManager
...going on when deleting child data from a parent - which was called from a different context, outside of a TransactionScope. Moved the parent call inside the scope and same context and my problem was solved.
– dan richardson
Feb 7 '13 at 10:31
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