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How to show all shared libraries used by executables in Linux?
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13 Answers
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How to check if hex color is “too black”?
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AlnitakAlnitak
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How to pass command line arguments to a rake task
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389
Options and dependencies need to be inside arrays:
namespace :thing do
desc "it does a thing...
Multiple Updates in MySQL
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Using your example:
INSERT INTO table (id,Col1,Col2) VALUES (1,1,1),(2,2,3),(3,9,3),(4,10,12)
ON DUPLICATE KEY UPDATE Col1=VALUES(Col1),Col2=VALUES(Col2);
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Calculating arithmetic mean (one type of average) in Python
... return float(sum(numbers)) / max(len(numbers), 1)
>>> mean([1,2,3,4])
2.5
>>> mean([])
0.0
In numpy, there's numpy.mean().
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Why was the arguments.callee.caller property deprecated in JavaScript?
...ion factorial(n) {
return (!(n>1))? 1 : factorial(n-1)*n;
}
[1,2,3,4,5].map(factorial);
// But this snippet will not:
[1,2,3,4,5].map(function(n) {
return (!(n>1))? 1 : /* what goes here? */ (n-1)*n;
});
To get around this, arguments.callee was added so we could do:
[1,2,3...
Python str vs unicode types
... ways into a sequence of binary data represented via str.
Note: In Python 3, unicode was renamed to str and there is a new bytes type for a plain sequence of bytes.
Some differences that you can see:
>>> len(u'à') # a single code point
1
>>> len('à') # by default utf-8 ->...
C++11 reverse range-based for-loop
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234
Actually Boost does have such adaptor: boost::adaptors::reverse.
#include <list>
#inclu...
Java “lambda expressions not supported at this language level”
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23 Answers
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How to check SQL Server version
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230
Following are possible ways to see the version:
Method 1: Connect to the instance of SQL Serve...