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How can I determine the direction of a jQuery scroll event?
...as an integer, your previous scroll value could be the same as the current one.
– Renato
Nov 26 '14 at 0:10
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How to git reset --hard a subdirectory?
...-index --skip-worktree (for those directories you want to ignore), as mentioned in "Why do excluded files keep reappearing in my git sparse checkout?".
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How do I update an entity using spring-data-jpa?
... id will update the corresponding database record rather than insert a new one, and also explains why save() is not called create().
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How to apply a function to two columns of Pandas dataframe
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There is a clean, one-line way of doing this in Pandas:
df['col_3'] = df.apply(lambda x: f(x.col_1, x.col_2), axis=1)
This allows f to be a user-defined function with multiple input values, and uses (safe) column names rather than (unsafe) ...
How to join components of a path when you are constructing a URL in Python
...it seems he doesn't want to preserve "absolute URLs" in the join (which is one of the key jobs of urlparse.urljoin;-), I'd recommend avoiding that. os.path.join would also be bad, for exactly the same reason.
So, I'd use something like '/'.join(s.strip('/') for s in pieces) (if the leading / must ...
How do I retrieve my MySQL username and password?
...fortunately your user password is irretrievable. It has been hashed with a one way hash which if you don't know is irreversible. I recommend go with Xenph Yan above and just create an new one.
You can also use the following procedure from the manual for resetting the password for any MySQL root acc...
Permanently Set Postgresql Schema Path
...l be looked up for tables. So if you have the same table name in more than one schema among the defaults, there will be no ambiguity, the server will always use the table from the first schema you specified for your search_path.
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AWS Difference between a snapshot and AMI
...t of a non ebs backed instance, but you can create a AMI (system image) of one.
Generally I use EBS snapshots as backup solutions for a database volume and I use an AMI to save instance configuration
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Updating packages in Emacs
...he following setup for packages (not sure if there is a better recommended one):
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Why is Multiple Inheritance not allowed in Java or C#?
...NET and Java designers did not allow multiple inheritance because they reasoned that adding MI added too much complexity to the languages while providing too little benefit.
For a more fun and in-depth read, there are some articles available on the web with interviews of some of the language design...