Ruby is also not far away :-)
Here's my code:
++++++++++++++++++++++++++++++++++++++++
require 'time'
def f
a = []
1000000.times do
a.push "What do you know"
a.push "so long ..."
a.push "chicken crosses road"
a.push "fool"
end
b = a.uniq
b.each do |x|
puts x
end
end
def f2
a = Array.new(4000000)
1000000.times do |i|
a[i] = "What do you know"
a[i+1] = "so long ..."
a[i+2] = "chicken crosses road"
a[i+3] = "fool"
end
b = a.uniq
b.each do |x|
puts x
end
end
f_start = Time.now
f
f_end = Time.now
f2_start = Time.now
f2
f2_end = Time.now
puts "f: Elapsed time: #{f_end - f_start} sec."
puts "f2: Elapsed time: #{f2_end - f_start} sec."
++++++++++++++++++++++++++++++++++++++++++
And the benchmark result:
What do you know
so long ...
chicken crosses road
fool
What do you know
so long ...
chicken crosses road
fool
nil
f: Elapsed time: 3.600294 sec.
f2: Elapsed time: 11.182927 sec.
++++++++++++++++++++++++++++++++++++++++++
I like ruby because its purity. :p
Licheng Fang wrote:
> Hi, I'm learning STL and I wrote some simple code to compare the
> efficiency of python and STL.
>
> //C++
> #include <iostream>
> #include <string>
> #include <vector>
> #include <set>
> #include <algorithm>
> using namespace std;
>
> int main(){
> vector<string> a;
> for (long int i=0; i<10000 ; ++i){
> a.push_back("What do you know?");
> a.push_back("so long...");
> a.push_back("chicken crosses road");
> a.push_back("fool");
> }
> set<string> b(a.begin(), a.end());
> unique_copy(b.begin(), b.end(), ostream_iterator<string>(cout, "\n"));
> }
>
> #python
> def f():
> a = []
> for i in range(10000):
> a.append('What do you know')
> a.append('so long...')
> a.append('chicken crosses road')
> a.append('fool')
> b = set(a)
> for s in b:
> print s
>
> I was using VC++.net and IDLE, respectively. I had expected C++ to be
> way faster. However, while the python code gave the result almost
> instantly, the C++ code took several seconds to run! Can somebody
> explain this to me? Or is there something wrong with my code?
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