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Find rows with multiple duplicate fields with Active Record, Rails & Postgres
What is the best way to find records with duplicate values across multiple columns using Postgres, and Activerecord?
5 Answ...
Is it possible to execute code once before all tests run?
Basically I would like to tell MSTest to execute a bit of code before launching into a series of test runs, essentially what I would like to do is the same thing as sticking some code in Main() .
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How do I use FileSystemObject in VBA?
...eference to the VB script run-time library.
The relevant file is usually located at \Windows\System32\scrrun.dll
To reference this file, load the
Visual Basic Editor (ALT+F11)
Select Tools > References from the drop-down menu
A listbox of available references will be displayed
Tick the check-bo...
Escaping keyword-like column names in Postgres
... Some warning: Without the quotes PostgreSQL folds all identifiers to lowercase. MyTable, myTable and mytable are just the same. With the quotes this folding is not done. So "MyTable" is no more the same as mytable.
– A.H.
Oct 4 '11 at 18:31
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How to convert comma-delimited string to list in Python?
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You can use the str.split method.
>>> my_string = 'A,B,C,D,E'
>>> my_list = my_string.split(",")
>>> print my_list
['A', 'B', 'C', 'D', 'E']
If you want to convert it to a tuple, just
>>> p...
How to get position of a certain element in strings vector, to use it as an index in ints vector?
... similar to array pointers; most of what you know about pointer arithmetic can be applied to vector iterators as well.
Starting with C++11 you can use std::distance in place of subtraction for both iterators and pointers:
ptrdiff_t pos = distance(Names.begin(), find(Names.begin(), Names.end(), old...
RegEx to make sure that the string contains at least one lower case char, upper case char, digit and
... a given string contains at least one character from each of the following categories.
3 Answers
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Asterisk in function call
... as input, and expands it into actual positional arguments in the function call.
So if uniqueCrossTabs was [ [ 1, 2 ], [ 3, 4 ] ], then itertools.chain(*uniqueCrossTabs) is the same as saying itertools.chain([ 1, 2 ], [ 3, 4 ])
This is obviously different from passing in just uniqueCrossTabs. In y...
How do I get the user agent with Flask?
I'm trying to get access to the user agent with Flask, but I either can't find the documentation on it, or it doesn't tell me.
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How to redirect a url in NGINX
... to redirect every http://test.com request to http://www.test.com . How can this be done.
4 Answers
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