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Foreign Key to non-primary key
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190
If you really want to create a foreign key to a non-primary key, it MUST be a column that has ...
How to drop a list of rows from Pandas dataframe?
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12 Answers
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What is the correct syntax for 'else if'?
I'm a new Python programmer who is making the leap from 2.6.4 to 3.1.1. Everything has gone fine until I tried to use the 'else if' statement. The interpreter gives me a syntax error after the 'if' in 'else if' for a reason I can't seem to figure out.
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How do I add a submodule to a sub-directory?
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451
You go into ~/.janus and run:
git submodule add <git@github ...> snipmate-snippets/snippe...
How do I get the last four characters from a string in C#?
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19 Answers
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Styling every 3rd item of a list using CSS? [duplicate]
...{
// Styling for every third element here.
}
:nth-child(3n):
3(0) = 0
3(1) = 3
3(2) = 6
3(3) = 9
3(4) = 12
:nth-child() is compatible in Chrome, Firefox, and IE9+.
For a work around to use :nth-child() amongst other pseudo-classes/attribute selectors in IE6 through to IE8, see this link.
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not None test in Python [duplicate]
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1033
if val is not None:
# ...
is the Pythonic idiom for testing that a variable is not set ...
Storing sex (gender) in database
...nge of Values
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TinyINT 1 255 (zero to 255)
INT 4 - 2,147,483,648 to 2,147,483,647
BIT 1 (2 if 9+ columns) 2 (0 and 1)
CHAR(1) 1 26 if case insensitive, 52 otherwise
The B...