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How to split a string, but also keep the delimiters?
...s as there was for the StringTokenizer - split(";", true) would be so much more readable than split("((?<=;)|(?=;))").
– Fabian Steeg
Feb 5 '10 at 11:17
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How do I compare version numbers in Python?
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108
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django models selecting single field
...name', flat=True)
That creates a flat list of all eng_names. If you want more than one field per row, you can't do a flat list: this will create a list of tuples:
Employees.objects.values_list('eng_name', 'rank')
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Replace all non-alphanumeric characters in a string
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If doing more than one replace, this will perform slightly quicker if you pre-compile the regex, e.g., import re; regex = re.compile('[^0-9a-zA-Z]+'); regex.sub('*', 'h^&ell.,|o w]{+orld')
– Chris
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When to use PNG or JPG in iPhone development?
...to display. However, large PNGs may take longer to read from storage than more compressed image formats, and thus be slower to display.
JPG's are smaller to store, but lossy (amount depends on compression level), and to display them requires a much more complicated decoding algorithm. But the typ...
Difference between two DateTimes C#?
...s to do what you need, i.e.
duration.TotalSeconds
duration.TotalMinutes
More info can be found here.
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Rails: What's a good way to validate links (URLs)?
...st
rescue URI::InvalidURIError
false
end
You can even decide to make it more restrictive. For instance, if you want the URL to be an HTTP/HTTPS URL, then you can make the validation more accurate.
require 'uri'
def valid_url?(url)
uri = URI.parse(url)
uri.is_a?(URI::HTTP) && !uri.hos...
What does multicore assembly language look like?
.../oz-x86-32-asm-003) but there is no standard library support. Quite a bit more than you asked for but it can maybe answer some of those lingering questions.
– duanev
Dec 15 '18 at 1:55
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