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What is the difference between declarative and imperative programming? [closed]
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809
A great C# example of declarative vs. imperative programming is LINQ.
With imperative programm...
Android canvas draw rectangle
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edited Dec 22 '11 at 15:00
Yuck
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answered D...
List comprehension: Returning two (or more) items for each item
...>>> list(chain.from_iterable((f(x), g(x)) for x in range(3)))
[2, 0, 3, 1, 4, 4]
Timings:
from timeit import timeit
f = lambda x: x + 2
g = lambda x: x ** 2
def fg(x):
yield f(x)
yield g(x)
print timeit(stmt='list(chain.from_iterable((f(x), g(x)) for x in range(3)))',
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Scroll to the top of the page using JavaScript?
... - I'd just use the native JavaScript window.scrollTo method -- passing in 0,0 will scroll the page to the top left instantly.
window.scrollTo(x-coord, y-coord);
Parameters
x-coord is the pixel along the horizontal axis.
y-coord is the pixel along the vertical axis.
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How do I get ruby to print a full backtrace instead of a truncated one?
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10 Answers
10
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Python: List vs Dict for look up table
I have about 10million values that I need to put in some type of look up table, so I was wondering which would be more efficient a list or dict ?
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Occurrences of substring in a string
...r = "helloslkhellodjladfjhello";
String findStr = "hello";
int lastIndex = 0;
int count = 0;
while(lastIndex != -1){
lastIndex = str.indexOf(findStr,lastIndex);
if(lastIndex != -1){
count ++;
lastIndex += findStr.length();
}
}
System.out.println(count);
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How can I temporarily disable a foreign key constraint in MySQL?
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10 Answers
10
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What is the difference between active and passive FTP?
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answered Nov 9 '09 at 4:57
paxdiablopaxdiablo
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UITableView set to static cells. Is it possible to hide some of the cells programmatically?
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You are looking for this solution :
StaticDataTableViewController 2.0
https://github.com/xelvenone/StaticDataTableViewController
which can show/hide/reload any static cell(s) with or without animation!
[self cell:self.outletToMyStaticCell1 setHidden:hide];
[self cell:self.outletToMyStatic...