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Scanner vs. StringTokenizer vs. String.Split
I just learned about Java's Scanner class and now I'm wondering how it compares/competes with the StringTokenizer and String.Split. I know that the StringTokenizer and String.Split only work on Strings, so why would I want to use the Scanner for a String? Is Scanner just intended to be one-stop-shop...
Creating an empty list in Python
... Why does list('') give [] instead of ['']?
– Chris_Rands
Sep 20 '18 at 10:18
This is because this func make list from...
How do I restart a WPF application? [duplicate]
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@AndreiRinea No. But just save them at start and pass them as arguments to this function call. It is easy.
– Hooch
Aug 9 '12 at 18:30
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C++ new int[0] — will it allocate memory?
...reference the memory that you get - you can only pass it to array delete - and you should delete it.
Here is an interesting foot-note (i.e not a normative part of the standard, but included for expository purposes) attached to the sentence from 3.7.3.1/2
[32. The intent is to have operator new(...
How do I run a simple bit of code in a new thread?
...o be careful about using the flag, since you did not describe its purpose, and its naming could easily lead one to believe that it does something else than what it actually does.
– Zero3
Sep 23 '16 at 8:44
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Use logging print the output of pprint
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Use pprint.pformat to get a string, and then send it to your logging framework.
from pprint import pformat
ds = [{'hello': 'there'}]
logging.debug(pformat(ds))
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Install Application programmatically on Android
...ble to programmatically install a dynamically downloaded apk from a custom Android application.
16 Answers
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Disable cache for some images
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A common and simple solution to this problem that feels like a hack but is fairly portable is to add a randomly generated query string to each request for the dynamic image.
So, for example -
<img src="image.png" />
Would be...
What is opinionated software?
...ve that a template system shouldn't provide access to user defined methods and functions as it leaves the system open to returning raw HTML. So an opinionated framework developer only allows access to data structures. By design, the software is limiting and encourages the designer into doing things ...
How to check if a URL is valid
...by:
require 'uri'
if url =~ URI::regexp
# Correct URL
end
Like Alexander Günther said in the comments, it checks if a string contains a URL.
To check if the string is a URL, use:
url =~ /\A#{URI::regexp}\z/
If you only want to check for web URLs (http or https), use this:
url =~ /\A#{U...