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How to find where a method is defined at runtime?
...this from Dave Thomas while teaching Advanced Ruby Studio
# Makes the case for separating method definitions into
# modules, especially when enhancing built-in classes.
module Perpetrator
def crime
end
end
class Fixnum
include Perpetrator
end
p 2.method(:crime) # The "2" here is an instance ...
Get file version in PowerShell
How can you get the version information from a .dll or .exe file in PowerShell?
11 Answers
...
When to use enumerateObjectsUsingBlock vs. for
...er pattern you want to use and comes more naturally in the context.
While for(... in ...) is quite convenient and syntactically brief, enumerateObjectsUsingBlock: has a number of features that may or may not prove interesting:
enumerateObjectsUsingBlock: will be as fast or faster than fast enumer...
Expand Python Search Path to Other Source
...ugh the command line. I'm trying to figure out how to get python to search for the right path when I run project modules. For instance, when I run something like:
...
How to get a variable name as a string in PHP?
...s to work so I've changed it to that.
function print_var_name($var) {
foreach($GLOBALS as $var_name => $value) {
if ($value === $var) {
return $var_name;
}
}
return false;
}
Edit: to be clear, there is no good way to do this in PHP, which is probably be...
Difference between left join and right join in SQL Server [duplicate]
...N: Return all records when there is a match in either left or right table
For example, lets suppose we have two table with following records:
Table A
id firstname lastname
___________________________
1 Ram Thapa
2 sam Koirala
3 abc xyz
6 sruthy ...
Which is faster: while(1) or while(2)?
...
}
Even with no optimizations (-O0), the generated assembly was identical for both programs. Therefore, there is no speed difference between the two loops.
For reference, here is the generated assembly (using gcc main.c -S -masm=intel with an optimization flag):
With -O0:
.file "main.c"
....
Difference between String replace() and replaceAll()
...g 's replace() and replaceAll() methods,
other than later uses regex? For simple substitutions like, replace . with / ,
is there any difference?
...
Should I be using object literals or constructor functions?
...ehaviour associated with an object (i.e. if the object is just a container for data/state), I would use an object literal.
var data = {
foo: 42,
bar: 43
};
Apply the KISS principle. If you don't need anything beyond a simple container of data, go with a simple literal.
If you want to add...
Error to install Nokogiri on OSX 10.9 Maverick?
I upgraded my OSX (Lion) to Mavericks and I can't install Nokogiri for my projects.
30 Answers
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