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make arrayList.toArray() return more specific types
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What if we have ArrayList<Animal> and it contains Dog and Cat types that extend Animal? Seems like it would fail if the first element is Dog and the next is Cat. It sees the first element, creates an array of type Dog, adds the dog then tries to add the cat a...
Why can I pass 1 as a short, but not the int variable i?
Why does the first and second Write work but not the last? Is there a way I can allow all 3 of them and detect if it was 1, (int)1 or i passed in? And really why is one allowed but the last? The second being allowed but not the last really blows my mind.
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How to get element by classname or id
...It might or might not work, yes. Please check my answer now (made an edit) and you'll probably know what to do.
– Ashesh
May 12 '14 at 12:44
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Cleaning `Inf` values from an R dataframe
...x, is.infinite(x),NA)))
Option 2 -- data.table
You could use data.table and set. This avoids some internal copying.
DT <- data.table(dat)
invisible(lapply(names(DT),function(.name) set(DT, which(is.infinite(DT[[.name]])), j = .name,value =NA)))
Or using column numbers (possibly faster if th...
Stripping everything but alphanumeric chars from a string in Python
...intable (part of the built-in string module). The use of compiled '[\W_]+' and pattern.sub('', str) was found to be fastest.
$ python -m timeit -s \
"import string" \
"''.join(ch for ch in string.printable if ch.isalnum())"
10000 loops, best of 3: 57.6 usec per loop
$ python -m timeit -...
Find column whose name contains a specific string
I have a dataframe with column names, and I want to find the one that contains a certain string, but does not exactly match it. I'm searching for 'spike' in column names like 'spike-2' , 'hey spike' , 'spiked-in' (the 'spike' part is always continuous).
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What command opens Ruby's REPL?
What command opens Ruby's REPL?
2 Answers
2
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How to create multiple levels of indentation in Javadoc?
... <li>one point one</li>
</ul>
</ul>
and get
one
one point one
I agree proper nesting is better.
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Clojure 1.2.1/1.3/1.4 'proxy generated in Grails 2.0.0 runtime fails. 1.2.0 is fine
I'm working on extending the Grails Clojure plugin in Grails 2.0.0 (and 2.1.0-SNAPSHOT) and I wanted to update it to Clojure 1.3.0 and add clojure.tools.logging .
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Reliable timer in a console application
... a threaded timer as the other types can drift if the main thread is busy, and I need this to be reliable.
2 Answers
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