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Setting the correct encoding when piping stdout in Python
...citly print with a given encoding every time. That would be repetitive and error-prone.
A better solution is to change sys.stdout at the start of your program, to encode with a selected encoding. Here is one solution I found on Python: How is sys.stdout.encoding chosen?, in particular a comment by ...
How to tell if browser/tab is active [duplicate]
I have a function that is called every second that I only want to run if the current page is in the foreground, i.e. the user hasn't minimized the browser or switched to another tab. It serves no purpose if the user isn't looking at it and is potentially CPU-intensive, so I don't want to just waste ...
What's the difference between comma separated joins and join on syntax in MySQL? [duplicate]
...x comma joins with the other join types when there is a join condition, an error of the form Unknown column 'col_name' in 'on clause' may occur"
– Captain Payalytic
Oct 17 '18 at 11:27
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Where is nodejs log file?
... log file. Each node.js "app" is a separate entity. By default it will log errors to STDERR and output to STDOUT. You can change that when you run it from your shell to log to a file instead.
node my_app.js > my_app_log.log 2> my_app_err.log
Alternatively (recommended), you can add logging ...
Delete empty lines using sed
... spaces or tabs in your "empty" line. Use POSIX classes with sed to remove all lines containing only whitespace:
sed '/^[[:space:]]*$/d'
A shorter version that uses ERE, for example with gnu sed:
sed -r '/^\s*$/d'
(Note that sed does NOT support PCRE.)
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Unable to cast object of type 'System.DBNull' to type 'System.String`
I got the above error in my app. Here is the original code
11 Answers
11
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Python unittest - opposite of assertRaises?
...er9876 is conceptually flawed: if you test for the non-raising of say ValueError, but ValueError is instead raised, your test must exit with a failure condition, not an error one. On the other hand, if in running the same code you would raise a KeyError, that would be an error, not a failure. In pyt...
How to clear the cache of nginx?
...he new page is cacheable as well. If you have removed a page (404 or other errors are now served by the backend), the page now sends a Set-Cookie or a "Content-Control: private" header, the cached content will not be "invalidated".
– rbu
Feb 2 '16 at 10:17
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Read a text file using Node.js?
...tf8');
console.log(data.toString());
} catch(e) {
console.log('Error:', e.stack);
}
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The difference between sys.stdout.write and print?
...nt (and more generally between a function and a statement).
In case of an error when evaluating arguments:
print "something", 1/0, "other" #prints only something because 1/0 raise an Exception
print("something", 1/0, "other") #doesn't print anything. The function is not called
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