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General suggestions for debugging in R
...urred, which is especially useful if you have several nested functions.
Next I will set options(error=recover); this immediately switches into browser mode where the error occurs, so you can browse the workspace from there.
If I still don't have enough information, I usually use the debug() functio...
Embed SVG in SVG?
I have an SVG document, and I would like to include an external svg image within it, i.e. something like:
6 Answers
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Update a record without first querying?
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can you provide an example?
– Bart Calixto
May 23 '12 at 15:01
17
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Check if item is in an array / list
... @jdi, and that loop will run much faster than the one coded explicitly in Python, not to mention being easier to read.
– Mark Ransom
Jun 28 '12 at 19:44
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Is 1.0 a valid output from std::generate_canonical?
...-nearest).
The 7549723rd output of mt19937 with your seed is 4294967257 (0xffffffd9u), which when rounded to 32-bit float gives 0x1p+32, which is equal to the max value of mt19937, 4294967295 (0xffffffffu) when that is also rounded to 32-bit float.
The standard could ensure correct behavior if it ...
What is the leading LINQ for JavaScript library? [closed]
I'm looking for a JavaScript library that will allow me to query complex JSON objects using a LINQ-like syntax. A quick search found a couple of promising options that look they might offer what I need:
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Ubuntu says “bash: ./program Permission denied” [closed]
...puter 1 and computer 2. I compiled a C++ program on computer 1, and I can execute it from the terminal using ./program_name . It runs fine.
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Can a class member function template be virtual?
...nd templates. I know that Java's generics are purely run time. You didn't exhaustively explain why you cannot have virtual member function templates in C++, but InQsitive did. You overly simplified the template and virtual mechanics to 'compile time' vs 'run time' and concluded that "you cannot have...
Accessing the web page's HTTP Headers in JavaScript
... URL and read its headers, but there is no guarantee that the headers are exactly equal to the current.
Use the following JavaScript code to get all the HTTP headers by performing a get request:
var req = new XMLHttpRequest();
req.open('GET', document.location, false);
req.send(null);
var header...
NGINX: upstream timed out (110: Connection timed out) while reading response header from upstream
...t 25K users and returns it from Riak to the app, I get an error in the Nginx log:
11 Answers
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