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How to get a random number in Ruby
...
Use rand(range)
From Ruby Random Numbers:
If you needed a random integer to simulate a roll of a six-sided die, you'd use: 1 + rand(6). A roll in craps could be simulated with 2 + rand(6) + rand(6).
Finally, if you just need...
Python list directory, subdirectory, and files
...iles: allFiles+=[os.path.join(folder,file)]
return allFiles
for i in range(100): files = listFiles1("src") # warm up
start = time.time()
for i in range(100): files = listFiles1("src") # listdir
print("Time taken: %.2fs"%(time.time()-start)) # 0.28s
start = time.time()
for i in range(100): fi...
Iterating over all the keys of a map
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https://play.golang.org/p/JGZ7mN0-U-
for k, v := range m {
fmt.Printf("key[%s] value[%s]\n", k, v)
}
or
for k := range m {
fmt.Printf("key[%s] value[%s]\n", k, m[k])
}
Go language specs for for statements specifies that the first value is the key, the second v...
Pythonic way to check if a list is sorted or not
...aw is looking for. Here is the one liner:
all(l[i] <= l[i+1] for i in xrange(len(l)-1))
For Python 3:
all(l[i] <= l[i+1] for i in range(len(l)-1))
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How do I parallelize a simple Python loop?
...ool = multiprocessing.Pool(4)
out1, out2, out3 = zip(*pool.map(calc_stuff, range(0, 10 * offset, offset)))
Note that this won't work in the interactive interpreter.
To avoid the usual FUD around the GIL: There wouldn't be any advantage to using threads for this example anyway. You want to use pr...
Can I use the range operator with if statement in Swift?
Is it possible to use the range operator ... and ..< with if statement. Maye something like this:
6 Answers
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Generate random numbers using C++11 random library
... answer, it appears that uniform_real_distribution returns a number in the range [a, b), where you want [a, b]. To do that, our uniform_real_distibution should actually look like:
std::uniform_real_distribution<double> dist(1, std::nextafter(10, DBL_MAX));
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List comprehension vs map
...tage of map when using exactly the same function:
$ python -mtimeit -s'xs=range(10)' 'map(hex, xs)'
100000 loops, best of 3: 4.86 usec per loop
$ python -mtimeit -s'xs=range(10)' '[hex(x) for x in xs]'
100000 loops, best of 3: 5.58 usec per loop
An example of how performance comparison gets compl...
Change string color with NSAttributedString?
...ring = [[NSMutableAttributedString alloc]initWithString:self.text.text];
NSRange range=[self.myLabel.text rangeOfString:texts[sliderValue]]; //myLabel is the outlet from where you will get the text, it can be same or different
NSArray *colors=@[[UIColor redColor],
[UIColor redColo...
What is :: (double colon) in Python when subscripting sequences?
...e of 3. Since 3*0=0, it returns also the item on position 0. For instance: range(10)[::3] outputs [0, 3, 6, 9]
– Ricky Robinson
Sep 19 '14 at 8:56
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