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How do you manage databases in development, test, and production?

... Name your databases as follows - dev_<<db>> , tst_<<db>> , stg_<<db>> , prd_<<db>> (Obviously you never should hardcode db names Thus you would be able to deploy even the different type of db's on same physical ...
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Django TemplateDoesNotExist?

... First solution: These settings TEMPLATE_DIRS = ( os.path.join(SETTINGS_PATH, 'templates'), ) mean that Django will look at the templates from templates/ directory under your project. Assuming your Django project is located at /usr/lib/python2.5/site-package...
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system(“pause”); - Why is it wrong?

...utable named "pause"!) Simply write your own "Pause()" function that uses _getch. OK, sure, _getch is platform dependent as well (note: it's defined in "conio.h") - but it's much nicer than system() if you are developing on Windows and it has the same effect (though it is your responsibility to pro...
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Two submit buttons in one form

...l be sent through as any other input. <input type="submit" name="button_1" value="Click me"> share | improve this answer | follow | ...
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Python Pandas merge only certain columns

... Hmmm ... I tried using this to merge column 'Unique_External_Users' from df2 to df1 but got an error ... "None of [Index(['U', 'n', 'i', 'q', 'u', 'e', '', 'E', 'x', 't', 'e', 'r', 'n', 'a',\n 'l', '', 'U', 's', 'e', 'r', 's'],\n dtype='object')] are in the [column...
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How to create an object for a Django model with a many to many field?

... m2m relations from unsaved objects. If you have the pks, try this: sample_object = Sample() sample_object.save() sample_object.users.add(1,2) Update: After reading the saverio's answer, I decided to investigate the issue a bit more in depth. Here are my findings. This was my original suggestion...
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Sorting a tab delimited file

... Ruby. Here's some example code: #!/usr/bin/perl -w use strict; my $sort_field = 2; my $split_regex = qr{\s+}; my @data; push @data, "7 8\t 9"; push @data, "4 5\t 6"; push @data, "1 2\t 3"; my @sorted_data = map { $_->[1] } sort { $a->[0] <=> $b->[0] } map { [ ( sp...
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How to Apply Gradient to background view of iOS Swift App

...rray <AnyObject> = [colorTop, colorBottom] – JP_ Sep 9 '14 at 6:46 7 for swift 1.0 the synt...
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How do I represent a hextile/hex grid in memory?

... Board: # Layout is just a double list of Tiles, some will be None def __init__(self, layout=None): self.numRows = len(layout) self.numCols = len(layout[0]) self.hexagons = [[None for x in xrange(self.numCols)] for x in xrange(self.numRows)] self.edges = [[None for x in xrange(s...
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How to check 'undefined' value in jQuery

... and fill them with a default value say 0.0: var aFieldsCannotBeNull=['ast_chkacc_bwr','ast_savacc_bwr']; jQuery.each(aFieldsCannotBeNull,function(nShowIndex,sShowKey) { var $_oField = jQuery("input[name='"+sShowKey+"']"); if($_oField.val().trim().length === 0){ $_oField.val('0.0') ...