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How can I check if an ip is in a network in Python?
...t == net
address = dottedQuadToNum("192.168.1.1")
networka = networkMask("10.0.0.0",24)
networkb = networkMask("192.168.0.0",24)
print (address,networka,networkb)
print addressInNetwork(address,networka)
print addressInNetwork(address,networkb)
This outputs:
False
True
If you just want a singl...
“INSERT IGNORE” vs “INSERT … ON DUPLICATE KEY UPDATE”
...
1003
I would recommend using INSERT...ON DUPLICATE KEY UPDATE.
If you use INSERT IGNORE, then the...
What happens if you static_cast invalid value to enum class?
...ering with a quote from the C++11 and C++14 Standards:
[expr.static.cast]/10
A value of integral or enumeration type can be explicitly converted to an enumeration type. The value is unchanged if the original value is within the range of the enumeration values (7.2). Otherwise, the resulting val...
How do I check if a number is a palindrome?
...d. Any algorithm you make will have to at least split the number into base-10 digits, which is 90% converted to a string anyway.
– Blorgbeard is out
Oct 13 '08 at 22:20
5
...
Reference — What does this symbol mean in PHP?
..., then the increment/decrement operation is done.
For example:
$apples = 10;
for ($i = 0; $i < 10; ++$i) {
echo 'I have ' . $apples-- . " apples. I just ate one.\n";
}
Live example
In the case above ++$i is used, since it is faster. $i++ would have the same results.
Pre-increment is a l...
Why does `a == b or c or d` always evaluate to True?
...gt; ast.parse("if a == b or c or d or e: ...")
<_ast.Module object at 0x1031ae6a0>
>>> ast.dump(_)
"Module(body=[If(test=BoolOp(op=Or(), values=[Compare(left=Name(id='a', ctx=Load()), ops=[Eq()], comparators=[Name(id='b', ctx=Load())]), Name(id='c', ctx=Load()), Name(id='d', ctx=Load(...
Apply a function to every row of a matrix or a data frame
... 3 4
[3,] 5 6
R> apply(M, 1, function(x) 2*x[1]+x[2])
[1] 4 10 16
R>
This takes a matrix and applies a (silly) function to each row. You pass extra arguments to the function as fourth, fifth, ... arguments to apply().
...
Best way to handle list.index(might-not-exist) in python?
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edited Jan 25 '10 at 14:32
answered Jan 25 '10 at 14:02
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How do I create a file AND any folders, if the folders don't exist?
...
answered Jul 8 '10 at 7:56
Christopher B. AdkinsChristopher B. Adkins
3,22322 gold badges2222 silver badges2727 bronze badges
...
C++: Rounding up to the nearest multiple of a number
...
bdesham
13.3k1010 gold badges6767 silver badges112112 bronze badges
answered Aug 4 '10 at 15:44
Mark RansomMark Ra...