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Restore file from old commit in git
...cal file path/to/file.txt
See man git-rev-parse for possible revision specifications there (of course a simple hash (like dd9bacb) will do nicely)
Don't forget to commit the change (after a review...)
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How to convert NSNumber to NSString
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@JonLOo when using this for specific number the decimal values loose exact values. For Eg : NSNumber *num = [NSNumber numberWithDouble:48.3]; NSString *strNumber = num.stringValue; gives results as 48.299999; this becomes critical if its A...
sqlalchemy flush() and get inserted id?
...r here lies in one or more of the following:
The details of your mapping
If there are any odd quirks of the backend in use (such as, SQLite doesn't generate integer values for a composite primary key)
What the emitted SQL says when you turn on echo
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Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
Is it possible to specify your own distance function using scikit-learn K-Means Clustering?
8 Answers
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Multi-line string with extra space (preserved indentation)
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If you're trying to get the string into a variable, another easy way is something like this:
USAGE=$(cat <<-END
This is line one.
This is line two.
This is line three.
END
)
If you indent your string with...
Drawing Isometric game worlds
...iles on the map will increase in diagonal lines, which might make it more difficult to visually map the location on the screen to the map represented as an array:
However, there is going to be a pitfall to implementing the above example code -- the rendering order will cause tiles that are suppos...
Signtool error: No certificates were found that met all given criteria with a Windows Store App?
...ng this error through Visual Studio it was because there was a signing certificate setup to match the computer it was originally developed on.
You can check this by going to the project properties > signing tab and checking the certificate details.
You can uncheck "Sign the ClickOnce manifests"...
How to check that a string is a palindrome using regular expressions?
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The answer to this question is that "it is impossible". More specifically, the interviewer is wondering if you paid attention in your computational theory class.
In your computational theory class you learned about finite state machines. A finite state machine is composed of nodes and edg...
How can I list all foreign keys referencing a given table in SQL Server?
...eign keys for a given table:
EXEC sp_fkeys 'TableName'
You can also specify the schema:
EXEC sp_fkeys @pktable_name = 'TableName', @pktable_owner = 'dbo'
Without specifying the schema, the docs state the following:
If pktable_owner is not specified, the default table visibility rules
of ...
Django queries - id vs pk
... is called id or object_id or whatever.
It also provides more consistency if you have models with different primary key fields.
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