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Null coalescing in powershell
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@BrainSlugs83 The error you're seeing in strict mode is unrelated to the null coalescing options presented. It is just the standard, Powershell checking that a variable is defined first. If you set $myval = $null before doing the test, the er...
Split Python Flask app into multiple files
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It's throwing an Import Error
– Abhishek Jebaraj
May 31 '17 at 12:06
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Tar archiving that takes input from a list of files
...e this: tar -cvf allfiles.tar --exclude='^#' -T mylist.txt. Tar reports an error, but when you check your tar archive, there are no errors, and all files from the list are inside your archive.
– Matt G
Oct 31 '18 at 6:05
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Create objective-c class instance by name?
...lass that doesn't exist. You won't find out until runtime if you make that error. Instead, if you use the built-in objective-c type of Class to create a variable, then the compiler will verify that the class exists.
For example, in your .h:
@property Class NameOfClass;
and then in your .m:
id o...
Big-oh vs big-theta [duplicate]
... "O when they should have said Ω" - whoa! That's a serious error! Are you sure lots of people actually do this? (disclosure: I have done it on stackoverflow by mistake).
– polygenelubricants
Jul 12 '10 at 17:11
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Python try…except comma vs 'as' in except
...le exception types too. But the syntax was confusing; you'd use except NameError, ValueError: then wondered why the ValueError exception was never being caught. Or used except (NameError, e): and were left with a NameError for 'e'!
– Martijn Pieters♦
Dec 14 '...
Find rows with multiple duplicate fields with Active Record, Rails & Postgres
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adding the .count gives PG::UndefinedFunction: ERROR: function count
– Magne
Jul 8 '15 at 13:01
1
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Escaping keyword-like column names in Postgres
... select would be
taken as a key word and would therefore provoke a parse error when
used where a table or column name is expected.
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Parsing XML with namespace in Python via 'ElementTree'
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I got the error:ValueError: write to closed for this line filemy_namespaces = dict([node for _, node in ET.iterparse(StringIO(my_schema), events=['start-ns'])]). Any idea wants wrong?
– Yuli
Feb 2...
What are namespaces?
... print (echo) different messages each.
Normally, this would cause a syntax error, as you cannot have two functions that share the same name.
To fix this, you could put these functions into separate namespaces. This would allow you to use both functions without any errors.
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