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JavaScript % (modulo) gives a negative result for negative numbers
...e to change the behaviour of the remainder operator, it would break a good range of programs using it. That's never going to happen.
– Aegis
Feb 2 '16 at 23:16
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Find the most frequent number in a numpy vector
...rray as large as the largest element in arr, so a small array with a large range would create an excessively large array. Apoengtus's answer below is much better, although I don't think numpy.unique() existed in 2011, when this answer was created.
– Wehrdo
Mar ...
Remove an entire column from a data.frame in R
... columns named in one_of()
select(-(name:hair_color)) %>% # the range of columns from 'name' to 'hair_color'
select(-contains('color')) %>% # any column name that contains 'color'
select(-starts_with('bi')) %>% # any column name that starts with 'bi'
select(-ends_w...
How many random elements before MD5 produces collisions?
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A rough rule of thumb for collisions is the square-root of the range of values. Your MD5 sig is presumably 128 bits long, so you're going to be likely to see collisions above and beyond 2^64 images.
share
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Can the jQuery UI Datepicker be made to disable Saturdays and Sundays (and holidays)?
... use a datepicker for choosing an appointment day. I already set the date range to be only for the next month. That works fine. I want to exclude Saturdays and Sundays from the available choices. Can this be done? If so, how?
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Clear back stack using fragments
...n the accepted answer when expecting a well defined behaviour over a wider range of devices and vendors:
(for reference, something along with this)
FragmentManager fm = getFragmentManager(); // or 'getSupportFragmentManager();'
int count = fm.getBackStackEntryCount();
for(int i = 0; i < count; ...
The first day of the current month in php using date_modify as DateTime object
...DateTime('last day of this month');
The only issue I came upon is that strange time is being set. I needed correct range for our search interface and I ended up with this:
$firstDay = new \DateTime('first day of this month 00:00:00');
$lastDay = new \DateTime('first day of next month 00:00:00');
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Remove characters except digits from string using Python?
...g of length 256) which in this case is the same as ''.join(chr(x) for x in range(256)) (just faster to make;-). .translate applies the translation table (which here is irrelevant since all essentially means identity) AND deletes characters present in the second argument -- the key part.
.translate ...
Detect backspace in empty UITextField
...turn false in textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool
– igrrik
Feb 6 '19 at 12:12
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如何选择机器学习算法 - 大数据 & AI - 清泛网移动版 - 专注IT技能提升
...here you have class A at the low end of some feature x, class B in the mid-range of feature x, and A again at the high end). One disadvantage is that they don’t support online learning, so you have to rebuild your tree when new examples come on. Another disadvantage is that they easily overfit...