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Fast way of counting non-zero bits in positive integer
...alf again as much time).
On the other hand, gmpy popcount() took about 1/20th of the time of bin(n).count("1"). So if you can install gmpy, use that.
To answer a question in the comments, for bytes I'd use a lookup table. You can generate it at runtime:
counts = bytes(bin(x).count("1") for x in r...
Check whether a string is not null and not empty
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905
What about isEmpty() ?
if(str != null && !str.isEmpty())
Be sure to use the parts of...
Python Pandas Error tokenizing data
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560
you could also try;
data = pd.read_csv('file1.csv', error_bad_lines=False)
Do note that this ...
IN clause and placeholders
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edited Feb 15 '13 at 21:06
answered Sep 14 '11 at 15:36
u...
Why Choose Struct Over Class?
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560
According to the very popular WWDC 2015 talk Protocol Oriented Programming in Swift (video, tran...
jQuery Validate Plugin - How to create a simple custom rule?
...e, element) {
return this.optional(element) || (parseFloat(value) > 0);
}, "* Amount must be greater than zero");
And then applying this like so:
$('validatorElement').validate({
rules : {
amount : { greaterThanZero : true }
}
});
Just change the contents of the 'addMetho...
How to wrap text in LaTeX tables?
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answered Apr 26 '09 at 14:32
moinudinmoinudin
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Choosing a file in Python with simple Dialog
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edited Aug 26 at 20:40
Try431
20833 silver badges1414 bronze badges
answered Aug 26 '10 at 21:22...
ALTER DATABASE failed because a lock could not be placed on database
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