To extend what Rahul Gupta said: You can use Java function int random = Random.nextInt(n). This returns a random int in the range [0, n-1]. I.e., to get the range [20, 80] use: final int random = new Random().nextInt(61) + 20; // [0, 60] + 20 => [20, 80] To generalize more: final int min … Read more
You can use itertools.chain for this: from itertools import chain concatenated = chain(range(30), range(2000, 5002)) for i in concatenated: … It works for arbitrary iterables. Note that there’s a difference in behavior of range() between Python 2 and 3 that you should know about: in Python 2 range returns a list, and in Python3 an … Read more
Yank lines 81-91 :81,91y<enter> If your fingers don’t like to find the : and , keys, this would work as well (go to line 81, yank 11 lines) 81gg11yy My only use of g is 5gg. To go to the 5th line. 22gg: 22nd line. As jimbo said, it’s really only a modifier for some … Read more
(1..10).include?(number) is the trick. Btw: If you want to validate a number using ActiveModel::Validations, you can even do: validates_inclusion_of :number, :in => 1..10 read here about validates_inclusion_of or the Rails 3+ way: validates :number, :inclusion => 1..10
The following exchange is between Chrome and a static web server, retrieving an MP4 video. Initial request – for the video. Note the Accept-Ranges response header to indicate the server has range header support: GET /BigBuckBunny_320x180.mp4 Cache-Control: max-age=0 Connection: keep-alive Accept-Language: en-GB,en-US,en Host: localhost:8080 Range: Accept: text/html,application/xhtml+xml,application/xml,*/* User-Agent: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/535.7 … Accept-Encoding: … Read more
Use the array.slice(begin [, end]) function. var a = [‘a’,’b’,’c’,’d’,’e’,’f’,’g’]; var sliced = a.slice(0, 3); //will contain [‘a’, ‘b’, ‘c’] The last index is non-inclusive; to mimic ruby’s behavior you have to increment the end value. So I guess slice behaves more like a[m…n] in ruby.
I had such a query with a calendar application I once wrote. I think I used something like this: … WHERE new_start < existing_end AND new_end > existing_start; UPDATE This should definitely work ((ns, ne, es, ee) = (new_start, new_end, existing_start, existing_end)): ns – ne – es – ee: doesn’t overlap and doesn’t match (because … Read more
This is a great use for a custom generator: Python 2: def char_range(c1, c2): “””Generates the characters from `c1` to `c2`, inclusive.””” for c in xrange(ord(c1), ord(c2)+1): yield chr(c) then: for c in char_range(‘a’, ‘z’): print c Python 3: def char_range(c1, c2): “””Generates the characters from `c1` to `c2`, inclusive.””” for c in range(ord(c1), ord(c2)+1): … Read more
The expression: ($min <= $value) && ($value <= $max) will be true if $value is between $min and $max, inclusively See the PHP docs for more on comparison operators
One solution is to use numpy.random.randint: import numpy as np df1[‘randNumCol’] = np.random.randint(1, 6, df1.shape[0]) Or if the numbers are non-consecutive (albeit slower), you can use this: df1[‘randNumCol’] = np.random.choice([1, 9, 20], df1.shape[0]) In order to make the results reproducible you can set the seed with numpy.random.seed (e.g. np.random.seed(42))