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Scala how can I count the number of occurrences in a list
...
but it yields the num. occurrences for each value as many times as the value occurs—seems inefficient and not very useful...
– Erik Kaplun
Sep 13 '13 at 20:15
...
C++, What does the colon after a constructor mean? [duplicate]
...al)
{
}
private:
const int& m_val;
};
That is the only time that you can change a const member variable. And as Michael noted in the comments section, it is also the only way to initialise a reference that is a class member.
Outside of using it to initialise const member variabl...
Why aren't programs written in Assembly more often? [closed]
... a good job. Agree with you though otherwise.
– old_timer
Apr 21 '10 at 18:08
4
@dwelch It is in...
How do I replace NA values with zeros in an R dataframe?
...set.nms(copy(dfN)),
DT.for.set.sqln = DT.for.set.sqln(copy(dfN)),
times = 600L
)
Summary of Results
> print(perf_results)
Unit: milliseconds
expr min lq mean median uq max neval
hybrd.ifelse 6171.0439 6339.7046 6425.221 6407.397 6496....
Difference between >>> and >>
...unsigned, but why does 7>>32=7? I ran a loop that did one shift at a time and saw that after 32 shifts, it came back to 7. The only way that this could make sense is that for each number shifted out, it entered an "outer circle." After 32 shifts, it reached somehow back to it's position, but o...
What is this 'Lambda' everyone keeps speaking of?
...we could use lambdas to respond to events that may happen at some point in time.
window.onload = function () {
alert("Loaded");
};
window.setTimeout(function () {
alert("Code executed after 2 seconds.");
}, 2000);
This could have been done in some other ways, but those are rather verbose...
Retrieve the commit log for a specific line in a file?
...accepting. Currently there is no way to "navigate through patches" back in time without some elaborate scripting. I'm hoping that gitk will get this functionality in it's patch view in the future.
– Adam Dymitruk
Dec 8 '11 at 19:50
...
When should one use RxJava Observable and when simple Callback on Android?
...ield, which loads data using Retrofit.
We don't want to do a webcall every time an EditText has a TextChangedEvent. When typing fast, only the last element should trigger the call.
On RxJava we can use the debounce operator:
inputObservable.debounce(1, TimeUnit.SECONDS).subscribe(new Action1<Str...
How can I make my match non greedy in vim?
...
Lots of these tools matured around the same time and independently developed their own dialect of a regular expression language. Many of these tools also were trying to solve different problems so it makes sense that the syntax could be -potentially wildly- different ...
How do I watch a file for changes?
...e being written by another process which I want to watch for changes. Each time a change occurs I'd like to read the new data in to do some processing on it.
...