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What's the fastest way to merge/join data.frames in R?
...(y) from main.d group by g1, g2"))
)
The outputs from the two benchmark call comparing the merge calculations are:
Joining by: x
test replications elapsed relative user.self sys.self user.child sys.child
3 data.table 1 0.34 1.000000 0.31 0.01 NA NA
2 ...
How to effectively work with multiple files in Vim
...e and close a tab, you can also use ZZ instead of :wq (just like would normally save and close)
– Andreas Grech
May 5 '10 at 14:34
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How to add a Timeout to Console.ReadLine()?
...
I'm surprised to learn that after 5 years, all of the answers still suffer from one or more of the following problems:
A function other than ReadLine is used, causing loss of functionality. (Delete/backspace/up-key for previous input).
Function behaves badly when in...
How can I display just a portion of an image in HTML/CSS?
...ich has replaced the now-deprecated clip property.
The clip-path property allows a range of options (more-so than the original clip), of:
inset — rectangular/cuboid shapes, defined with four values as 'distance-from' (top right bottom left).
circle — circle(diameter at x-coordinate y-coordina...
How do I preserve line breaks when using jsoup to convert html to plain text?
...ument.select("p").prepend("\\n\\n");
String s = document.html().replaceAll("\\\\n", "\n");
return Jsoup.clean(s, "", Whitelist.none(), new Document.OutputSettings().prettyPrint(false));
}
It satisfies the following requirements:
if the original html contains newline(\n), it gets preserve...
Tactics for using PHP in a high-load site
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No two sites are alike. You really need to get a tool like jmeter and benchmark to see where your problem points will be. You can spend a lot of time guessing and improving, but you won't see real results until you measure and compare your changes.
For ...
What is the most useful script you've written for everyday life? [closed]
...e so popular :p
As for how - Microsoft exposes a nice little API feature called Hooks.
Using that hook; I was able to write a "filter" that did what I needed it to do (hint: if you return 1 with your callback windows will not process the keystroke).
The reason I know about this actually is not be...
Correct way to add external jars (lib/*.jar) to an IntelliJ IDEA project
...ider adding a lib folder, and use "Attach Jar Directories", which will add all jars in the lib folder. For a largish project, this keeps you from having to choose each jar individually.
– joeslice
Jul 6 '09 at 18:04
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F# changes to OCaml [closed]
... is derived from OCaml, but what major items are missing or added? Specifically I'm curious as to whether the resources available for learning OCaml are also useful to someone who wants to learn F#.
...
contenteditable change events
... (mouseup, for example). You may want to poll the element's contents as a fallback.
UPDATE 29 October 2014
The HTML5 input event is the answer in the long term. At the time of writing, it is supported for contenteditable elements in current Mozilla (from Firefox 14) and WebKit/Blink browsers, but ...