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Add custom messages in assert?
...==b is false, the and-expression should also be false, and, therefore, the string should not be evaluated.
– ragnarius
Nov 7 '14 at 17:31
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Proper way to declare custom exceptions in modern Python?
...er standard other exception classes have, so that (for instance) any extra string I include in the exception is printed out by whatever tool caught the exception.
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Why is the gets function so dangerous that it should not be used?
...ng gets, you want to use fgets, which has the signature
char* fgets(char *string, int length, FILE * stream);
(fgets, if it reads an entire line, will leave the '\n' in the string; you'll have to deal with that.)
It remained an official part of the language up to the 1999 ISO C standard, but
it ...
Is there a performance difference between a for loop and a for-each loop?
...ts.
First, the classic way of looping through List:
for (int i=0; i < strings.size(); i++) { /* do something using strings.get(i) */ }
Second, the preferred way since it's less error prone (how many times have YOU done the "oops, mixed the variables i and j in these loops within loops" thing?...
Why does Windows64 use a different calling convention from all other OSes on x86-64?
...arg[0] and arg[1] has some advantages. See cHao's comment.
?SI and ?DI are string instruction source / destination operands, and as cHao mentioned, their use as argument registers means that with the AMD64 UN*X calling conventions, the simplest possible strcpy() function, for example, only consists ...
Unique fields that allow nulls in Django
...here is that the normalized "blank" value for a form CharField is an empty string, not None. So if you leave the field blank, you get an empty string, not NULL, stored in the DB. Empty strings are equal to empty strings for uniqueness checks, under both Django and database rules.
You can force the...
Ruby: require vs require_relative - best practice to workaround running in both Ruby =1.
...olute/path/to/file.rb, what happens is that expand_path will construct the string /absolute/path/to/file.rb/../relative/path, and then apply a rule that says that .. should remove the path component before it (file.rb in this case), returning /absolute/path/to/relative/path.
Is this best practice? ...
“Content is not allowed in prolog” when parsing perfectly valid XML on GAE
...ld be in the buffer.
Before passing the buffer to the Parser do this...
String xml = "<?xml ...";
xml = xml.trim().replaceFirst("^([\\W]+)<","<");
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How to pretty-print a numpy.array without scientific notation and with given precision?
...rks great. As a side note, you can also use set_printoptions if you want a string representation and not necessarily use print. You can just call __str__() of the numpy array instance and you will get the formatted string as per the printoptions you set.
– Jayesh
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Unioning two tables with different number of columns
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For the null value, this hack worked for me: 'SomeString' as DummyColumn. Basically, you just replace NULL with some value. This also worked when used with groupby.
– Saurabh Jain
Feb 27 at 6:27
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