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How expensive is RTTI?
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Regardless of compiler, you can always save on runtime if you can afford to do
if (typeid(a) == typeid(b)) {
B* ba = static_cast<B*>(&a);
etc;
}
instead of
B* ba = dynamic_cast<B*>(&a);
if (ba) {
etc;
}
The former involves only one comparison of s...
Getting the name of a variable as a string
...tly with the variable
I am the author of this package. Please let me know if you have any questions or you can submit issues on Github.
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Delete specific line number(s) from a text file using sed?
I want to delete one or more specific line numbers from a file. How would I do this using sed?
6 Answers
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How do I find if a string starts with another string in Ruby?
What the best way to find if a string starts with another in Ruby (without rails)?
4 Answers
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Remove rows with all or some NAs (missing values) in data.frame
... 2
6 ENSG00000221312 0 1 2 3 2
Your solution can't work. If you insist on using is.na, then you have to do something like:
> final[rowSums(is.na(final[ , 5:6])) == 0, ]
gene hsap mmul mmus rnor cfam
2 ENSG00000199674 0 2 2 2 2
4 ENSG00000207604 0 ...
Append class if condition is true in Haml
If post.published?
5 Answers
5
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What is the size of column of int(11) in mysql in bytes?
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An INT will always be 4 bytes no matter what length is specified.
TINYINT = 1 byte (8 bit)
SMALLINT = 2 bytes (16 bit)
MEDIUMINT = 3 bytes (24 bit)
INT = 4 bytes (32 bit)
BIGINT = 8 bytes (64 bit).
The length just specifies how many characters to pad when selecting data with the ...
How to exit a function in bash
How would you exit out of a function if a condition is true without killing the whole script, just return back to before you called the function.
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What is the most “pythonic” way to iterate over a list in chunks?
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Modified from the recipes section of Python's itertools docs:
from itertools import zip_longest
def grouper(iterable, n, fillvalue=None):
args = [iter(iterable)] * n
return zip_longest(*args, fillvalue=fillvalue)
Exa...
Angularjs Template Default Value if Binding Null / Undefined (With Filter)
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This doesn't work if you need to display a '0' value in column
– neel shah
Jun 23 '14 at 11:30
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