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How do I squash two non-consecutive commits?
... squash D into A.
Git will open an editor, and you see a file like this, ex: git rebase --interactive HEAD~4
pick aaaaaaa Commit A
pick bbbbbbb Commit B
pick ccccccc Commit C
pick ddddddd Commit D
# Rebase aaaaaaa..ddddddd onto 1234567 (4 command(s))
#
# Commands:
# p, pick = use commit
# r, rewo...
Rails: Default sort order for a rails model?
...u need this instead:
default_scope order('created_at DESC')
For Rails 2.x:
default_scope :order => 'created_at DESC'
Where created_at is the field you want the default sorting to be done on.
Note: ASC is the code to use for Ascending and DESC is for descending (desc, NOT dsc !).
scope...
SQLAlchemy: Creating vs. Reusing a Session
... to your DB. For me that means the second I would do my first session.add(x) or something similar, I would first do
2 Ans...
When to use dynamic vs. static libraries
...l), which has all but been eliminated by more recent Windows OSes (Windows XP in particular).
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Difference between framework and static library in xcode4, and how to call them
I am quite new to xcode and objective-c. I want to ask a very basic question.
2 Answers
...
Color in git-log
...amano (gitster):
log --decorate: do not leak "commit" color into the next item
In "git log --decorate", you would see the commit header like this:
commit ... (HEAD, jc/decorate-leaky-separator-color)
where "commit ... (" is painted in color.diff.commit, "HEAD" in color.decorate.head,...
“Large data” work flows using pandas
...o an operation (in-memory), create new columns, save these.
(Giving a toy example could enable us to offer more specific recommendations.)
After that processing, then what do you do? Is step 2 ad hoc, or repeatable?
Input flat files: how many, rough total size in Gb. How are these organized e.g. by ...
PreparedStatement IN clause alternatives?
...ns are:
Prepare SELECT my_column FROM my_table WHERE search_column = ?, execute it for each value and UNION the results client-side. Requires only one prepared statement. Slow and painful.
Prepare SELECT my_column FROM my_table WHERE search_column IN (?,?,?) and execute it. Requires one prepared s...
Setting Short Value Java
...er literals are of type int by default. For some other types, you may suffix the literal with a case-insensitive letter like L, D, F to specify a long, double, or float, respectively. Note it is common practice to use uppercase letters for better readability.
The Java Language Specification does no...
Why is address zero used for the null pointer?
...tandard has a note that makes clear that converting "an integral constant expression with value zero always yields a null pointer, but converting other expressions that happen to have value zero need not yield a null pointer".
a negative value might be just as usable by the platform as an address - ...