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MySQL - why not index every field?
Recently I've learned the wonder of indexes, and performance has improved dramatically. However, with all I've learned, I can't seem to find the answer to this question.
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How to get the first line of a file in a bash script?
...t in a bash variable the first line of a file. I guess it is with the grep command, but it is any way to restrict the number of lines?
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Is there a generator version of `string.split()` in Python?
string.split() returns a list instance. Is there a version that returns a generator instead? Are there any reasons against having a generator version?
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__lt__ instead of __cmp__
Python 2.x has two ways to overload comparison operators, __cmp__ or the "rich comparison operators" such as __lt__ . The rich comparison overloads are said to be preferred, but why is this so?
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MySQL JOIN the most recent row only?
I have a table customer that stores a customer_id, email and reference. There is an additional table customer_data that stores a historical record of the changes made to the customer, i.e. when there's a change made a new row is inserted.
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Django filter queryset __in for *every* item in list
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How to group dataframe rows into list in pandas groupby?
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In Python, how do I index a list with another list?
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phpunit mock method multiple calls with different arguments
Is there any way to define different mock-expects for different input arguments? For example, I have database layer class called DB. This class has method called "Query ( string $query )", that method takes an SQL query string on input. Can I create mock for this class (DB) and set different return ...
How to do case insensitive search in Vim
I'd like to search for an upper case word, for example COPYRIGHT in a file. I tried performing a search like:
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