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rails 3 validation on uniqueness on multiple attributes
I use Rails 3.0.0.beta4
3 Answers
3
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round() for float in C++
...ath (according to http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf)
#include <cmath>
#include <iostream>
int main(int argc, char** argv) {
std::cout << "round(0.5):\t" << round(0.5) << std::endl;
std::cout << "round(-0.5):\t" << round(...
How do I represent a hextile/hex grid in memory?
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answered Jun 1 '13 at 15:59
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Get all attributes of an element using jQuery
...he attributes of that element to output them, for example an tag may have 3 or more attributes, unknown to me and I need to get the names and values of these attributes. I was thinking something along the lines of:
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awk without printing newline
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awk '{sum+=$3}; END {printf "%f",sum/NR}' ${file}_${f}_v1.xls >> to-plot-p.xls
print will insert a newline by default. You dont want that to happen, hence use printf instead.
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Passing arguments forward to another javascript function
...nts);
}
function b(){
alert(arguments); //arguments[0] = 1, etc
}
a(1,2,3);
You can test it out here.
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How do I choose grid and block dimensions for CUDA kernels?
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3 Answers
3
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MySQL ERROR 1045 (28000): Access denied for user 'bill'@'localhost' (using password: YES)
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37 Answers
37
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python setup.py uninstall
...e containing directory, e.g. /Library/Frameworks/Python.framework/Versions/3.7/lib/python3.7/site-packages/my_module-0.1.egg/ on macOS. It has no files, but Python will still import an empty module:
>>> import my_module
>>> my_module.__file__
None
Once deleted, Python shows:
&g...
CSS: bolding some text without changing its container's size
...t;li>Item 1</li>
<li>Item 2</li>
<li>Item 3</li>
<li><code>text-shadow: 0px 0px 1px black;</code></li>
</ul>
<ul class="textshadow-alt">
<li>Item 1</li>
<li>Item 2</li>
<li>Item 3...