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Fastest way to determine if an integer's square root is an integer
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How to validate an Email in PHP?
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You can use the filter_var() function, which gives you a lot of handy validation and sanitizat...
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...
Inline labels in Matplotlib
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Nice question, a while ago I've experimented a bit with this, but haven't used it a lot because...
Why are Python lambdas useful? [closed]
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26 Answers
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How to redirect stderr and stdout to different files in the same line in script?
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Just add them in one line command 2>> error 1>> output
However, note that >>...
getMinutes() 0-9 - How to display two digit numbers?
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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 does this iterative list-growing code give IndexError: list assignment index out of range?
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j is an empty list, but you're attempting to write to element [0] in the first iteration, which...
“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 ...