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Large, persistent DataFrame in pandas
...y I can read the file and concat all of them together into one DataFrame. Does the DataFrame have to reside in memory? With SAS, I can work with datasets of any size as long as I have the hard-drive space. Is it the same with DataFrames? I get the impression they are constrained by RAM and not h...
When should you NOT use a Rules Engine? [closed]
...stood. I'm not aware of any tools that can check to ensure that conflicts don't exist.
I think partitioning rules sets to keep them small is a better option. Aspects can be a way to share a common rule set among many objects.
I prefer a simpler, more data driven approach wherever possible.
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Samples of Scala and Java code where Scala code looks simpler/has fewer lines?
...lass, and some more - for example it supports pattern matching (which Java doesn't have). Scala 2.8 adds named and default arguments, which are used to generate a copy method for case classes, which gives the same ability as the with* methods of the following Java class.
public class Person impleme...
How to add a new method to a php object on the fly?
How do I add a new method to an object "on the fly"?
9 Answers
9
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How can I get the max (or min) value in a vector?
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Hi, do you know is it possible to apply it to dimension array or vector?
– Charles Chow
Aug 13 '14 at 21:58
3...
Python loop counter in a for loop [duplicate]
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I'll sometimes do this:
def draw_menu(options, selected_index):
for i in range(len(options)):
if i == selected_index:
print " [*] %s" % options[i]
else:
print " [ ] %s" % options[i]
Though I te...
Whether a variable is undefined [duplicate]
How do I find if a variable is undefined?
5 Answers
5
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How to copy files across computers using SSH and MAC OS X Terminal [closed]
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You can do this with the scp command, which uses the ssh protocol to copy files across machines. It extends the syntax of cp to allow references to other systems:
scp username1@hostname1:/path/to/file username2@hostname2:/path/to/ot...
How does delete[] know it's an array?
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The compiler doesn't know it's an array, it's trusting the programmer. Deleting a pointer to a single int with delete [] would result in undefined behavior. Your second main() example is unsafe, even if it doesn't immediately crash.
Th...
Proxy with express.js
To avoid same-domain AJAX issues, I want my node.js web server to forward all requests from URL /api/BLABLA to another server, for example other_domain.com:3000/BLABLA , and return to user the same thing that this remote server returned, transparently.
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