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How to make a function wait until a callback has been called using node.js
...orking with event driven systems like node, your function should accept a callback parameter that will be invoked when then computation is complete. The caller should not wait for the value to be "returned" in the normal sense, but rather send the routine that will handle the resulting value:
funct...
Are Exceptions in C++ really slow
...r
The cost, however, is not trivial to measure:
The side-table is generally cold, and thus fetching it from memory takes a long time
Determining the right handler involves RTTI: many RTTI descriptors to fetch, scattered around memory, and complex operations to run (basically a dynamic_cast test ...
How to parse XML to R data frame
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Data in XML format are rarely organized in a way that would allow the xmlToDataFrame function to work. You're better off extracting everything in lists and then binding the lists together in a data frame:
require(XML)
data <- xmlParse("http://forecast.weather.gov/MapClick.php?lat=...
How to send POST request in JSON using HTTPClient in Android?
...uthor used to make a HttpClient Request. I do not claim to be an expert at all this so if anyone has a better way to word some of the terminology feel free.
public static HttpResponse makeRequest(String path, Map params) throws Exception
{
//instantiates httpclient to make request
DefaultH...
Comprehensive beginner's virtualenv tutorial? [closed]
...'ve been hearing the buzz about virtualenv lately, and I'm interested. But all I've heard is a smattering of praise, and don't have a clear understanding of what it is or how to use it.
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How to RSYNC a single file?
... anywhere on the server by just specifying it's path? The man page isn't really clear about that.
– user1115652
Jun 18 '16 at 9:11
2
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Android Endless List
...ling in the middle of the screen? it should only load the next 10 when actually reaching the list bottom.
– Matthias
Aug 5 '10 at 10:13
9
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Can I nest a element inside an using HTML5?
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You don't need the span at all with bootstrap. Just move the whole class part to the <a> and you will have a link button. eg <a href="#register" class="btn btn-default btn-lg">Subscribe</a>
– Ryan Buddicom
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Is there a regular expression to detect a valid regular expression?
...itutions and translations. s/<this part>/.../
It is not theoretically possible to match all valid regex grammars with a regex.
It is possible if the regex engine supports recursion, such as PCRE, but that can't really be called regular expressions any more.
Indeed, a "recursive regu...
What's the difference between .so, .la and .a library files?
...t in memory). But what is the difference between .a and .la ? Are these all static libraries?
1 Answer
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