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Python Infinity - Any caveats?
... not get an inf value through usual arithmetic calculations:
>>> 2.0**2
4.0
>>> _**2
16.0
>>> _**2
256.0
>>> _**2
65536.0
>>> _**2
4294967296.0
>>> _**2
1.8446744073709552e+19
>>> _**2
3.4028236692093846e+38
>>> _**2
1.15792089...
What is the difference between bottom-up and top-down?
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251
rev4: A very eloquent comment by user Sammaron has noted that, perhaps, this answer previou...
MySQL: Insert record if not exists in table
...able_listnames` (
`id` int(11) NOT NULL auto_increment,
`name` varchar(255) NOT NULL,
`address` varchar(255) NOT NULL,
`tele` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB;
Insert a record:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'Rupert', 'S...
How to use if - else structure in a batch file?
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112
Your syntax is incorrect. You can't use ELSE IF. It appears that you don't really need it anyway...
Finding differences between elements of a list
...gt;> [j-i for i, j in zip(t[:-1], t[1:])] # or use itertools.izip in py2k
[2, 3]
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“static const” vs “#define” vs “enum”
...me, then:
If you need to pass a pointer around, you must use (1).
Since (2) is apparently an option, you don't need to pass pointers around.
Both (1) and (3) have a symbol in the debugger's symbol table - that makes debugging easier. It is more likely that (2) will not have a symbol, leaving you ...
R - Concatenate two dataframes?
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227
You want "rbind".
b$b <- NA
new <- rbind(a, b)
rbind requires the data frames to have...
Why are Python lambdas useful? [closed]
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26 Answers
26
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How to compare two colors for similarity/difference
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answered Jan 26 '12 at 14:20
Liudvikas BukysLiudvikas Bukys
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