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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(...
SHA1 vs md5 vs SHA256: which to use for a PHP login?
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110
Neither. You should use bcrypt. The hashes you mention are all optimized to be quick and easy o...
Implementing slicing in __getitem__
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answered May 29 '10 at 22:56
Ignacio Vazquez-AbramsIgnacio Vazquez-Abrams
667k127127 gold badges11911191 silver badges12501250 bronze badges
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How to validate date with format “mm/dd/yyyy” in JavaScript?
...rs
var parts = dateString.split("/");
var day = parseInt(parts[1], 10);
var month = parseInt(parts[0], 10);
var year = parseInt(parts[2], 10);
// Check the ranges of month and year
if(year < 1000 || year > 3000 || month == 0 || month > 12)
return false;
...
XPath to find elements that does not have an id or class
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answered Mar 8 '10 at 19:36
WelbogWelbog
54.1k88 gold badges101101 silver badges118118 bronze badges
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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().
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What guarantees are there on the run-time complexity (Big-O) of LINQ methods?
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answered May 9 '10 at 23:16
AaronaughtAaronaught
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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...
How can I determine if a String is non-null and not only whitespace in Groovy?
...true too"
– tim_yates
Aug 27 '19 at 10:33
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show 2 more comments
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vector vs. list in STL
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answered Feb 5 '10 at 17:56
Martin YorkMartin York
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