Tagged Questions
0
votes
5answers
41 views
How a programmers solve the dilemma of using old variables instead of new variables?
For example:
... some code
int sizeOfSomeObject = someObject.length();
... some code, sizeOfSomeObject is not need anymore
now I need other int variable for other action(for example, for position ...
-2
votes
1answer
69 views
recursion Vs. Iteration - Pros & Con's [duplicate]
What (if any) advantages/disadvantages, does recursion have versus iteration? Is one better than the other? If so, why? Is one worse than the other? I'm looking to get a general pro's versus con's ...
0
votes
2answers
30 views
what is stl-style for merge two containers while alternating the elements?
What is an elegant way to do the following in STL-style rather then for(;;):
Given p={1,2,3} and q={7,8,9}, i'd like to merge this to be pq={1,7,2,8,3,9}. one application is creating pq vector for ...
1
vote
1answer
42 views
Does JVM manage class code by function? Is splitting a large decision function effective on memory usage?
Problem
In a server-based java solution we need a bigger lookup table with static values (about 300 kB but the data increases yearly with new values for the next year).
Usually the table would be ...
5
votes
5answers
97 views
Does an else statement slow compile time/run speed? (In situations where one could be avoided)
On innumerable (well, numerable, but many) occasions, especially within a method/function of a class, I've been in a situation where I want to do a set of operations within a void-return function, but ...
2
votes
1answer
118 views
Simple indeterminate progress bar in Python [closed]
Even when I am afraid to be a bit off-topic, but I am not sure where else to ask this, sorry!
I wish to build a **simple** indeterminate progress bar in Python
there is a really valid progression ...
0
votes
4answers
60 views
append in a list in Python using result value or a function
are the both approaches equivalent from a point of view of performance and coding-style?
def foo(n):
return n*2
# case 1 with ".append(function())"
mylist = [1,2,3,4,5,6,7,8,9,10]
result = ...
3
votes
3answers
83 views
Are long variable names a waste of memory?
If I have an variable int d; // some comment.
Will that be better than int daysElapsedSinceBlahBlahBlahBlah with no comment.
It is more reabale, but will it waste memory?
0
votes
2answers
73 views
combine two loops in python
suppose to have two polygons p1 and p2, where p2 is completely inside p1
p1 = [(0, 10), (10, 10), (10, 0), (0, 0)]
p2 = [(2, 6), (6, 6), (6, 2), (2, 2)]
degree_of_contact = 0
xyarrays = [p1,p2]
...
0
votes
2answers
69 views
python - When function need to became a class
I am learning the use of class in Python. Typically I write several function to run my script, but recently i am writing using class.
I am sorry for the basic question, but when is the limit to use a ...
1
vote
1answer
104 views
using @property to build a class in Python
I am not clear on the use of @property (advantages and disadvantages). I want to ask for some example using this class built with the help of Martijn.
The data (in text format) always has a x,y, and ...
2
votes
2answers
44 views
Resolving how to give an attribute in a class in Python
I have the following class:
class Point(object):
__slots__= ("x","y","z","data","classification")
def __init__(self,x,y,z,n=None):
self.x = float(x)
self.y = float(y)
...
3
votes
2answers
102 views
Using len() and def __len__(self): to build a class
Just curious,
Is there any difference (advantages and disadvantages) between using len() or def __len__() when I build a class? And which is the best Python style?
class foo(object):
def ...
0
votes
1answer
67 views
Python: resolve problems with my Class [closed]
I have the following class
def get_percentile(obs,*args):
lstper = []
for arg in args:
lstper.append(np.percentile(obs,arg))
return lstper
get_percentile([1,2,3,4,5],25,50,75)
...
0
votes
1answer
41 views
how to build a function in order to process single iterable or two or more argument
i have the following function example (average of a list of number):
def avg(obs):
return (1. / len(obs)) * np.sum(obs)
avg([1,2,3,4,5])
3.0
I am interesting t understand how use a single ...
