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Regular expression for first and last name
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202
Don't forget about names like:
Mathias d'Arras
Martin Luther King, Jr.
Hector Sausage-Hausen
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What does auto do in margin:0 auto?
What does auto do in margin:0 auto; ?
7 Answers
7
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What does value & 0xff do in Java?
... = value;
then result would end up with the value ff ff ff fe instead of 00 00 00 fe. A further subtlety is that the & is defined to operate only on int values1, so what happens is:
value is promoted to an int (ff ff ff fe).
0xff is an int literal (00 00 00 ff).
The & is applied to yield...
Relative frequencies / proportions with dplyr
...n = n()) %>%
mutate(freq = n / sum(n))
# am gear n freq
# 1 0 3 15 0.7894737
# 2 0 4 4 0.2105263
# 3 1 4 8 0.6153846
# 4 1 5 5 0.3846154
From the dplyr vignette:
When you group by multiple variables, each summary peels off one level of the grouping. That makes ...
Check if a number has a decimal place/is a whole number
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20 Answers
20
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str performance in python
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105
'%s' % 100000 is evaluated by the compiler and is equivalent to a constant at run-time.
>&g...
Finding the max value of an attribute in an array of objects
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808
To find the maximum y value of the objects in array:
Math.max.apply(Math, array.map(function(o...
How do I get the real .height() of a overflow: hidden or overflow: scroll div?
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Use the .scrollHeight property of the DOM node: $('#your_div')[0].scrollHeight
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Concatenating two one-dimensional NumPy arrays
...ents.
From the NumPy documentation:
numpy.concatenate((a1, a2, ...), axis=0)
Join a sequence of arrays together.
It was trying to interpret your b as the axis parameter, which is why it complained it couldn't convert it into a scalar.
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Ruby: Merging variables in to a string
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answered Feb 16 '09 at 21:42
Mike WoodhouseMike Woodhouse
47.6k1212 gold badges8585 silver badges123123 bronze badges
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