python concatenate null string

if I always need a string even when `a` and `b` are both null, # I would se...

if I always need a string even when `a` and `b` are both null, # I would set `output` to a default beforehand. # Or actually, as Supr points out.

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FullName = LastName + (", " + FirstName if FirstName else "&...

FullName = LastName + (", " + FirstName if FirstName else "").

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>>> strings = ['foo','','bar','...

>>> strings = ['foo','','bar','moo'] >>> ' '.join(filter(None, strings)) 'foo bar moo'. By using None in the filter() call, it removes all falsy elements.

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If you actually want your function to behave like the str() built-in, but r...

If you actually want your function to behave like the str() built-in, but return an empty string when the argument is None, do this: def xstr(s): if s is.

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the values are passed as a Python tuple, essentially a # non-editable list ...

the values are passed as a Python tuple, essentially a # non-editable list # def concat(*args): # Initialize the return value to an empty string.

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One of the Python articles I found mentions the NULL issue: .. In reality y...

One of the Python articles I found mentions the NULL issue: .. In reality you can create your appropriate string without the join but you need a  I am trying to calculate a field where i want to exclude any null.

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(An Expression Type of PYTHON would also work for all these examples. . If ...

(An Expression Type of PYTHON would also work for all these examples. . If your field contains null values, you need to turn it into a string.

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Jobs: Online editors C, Java, PHP, Python, C Sharp are closed for maintenan...

Jobs: Online editors C, Java, PHP, Python, C Sharp are closed for maintenance and upgradation. In the example below the strings specified in the argument have Example of PostgreSQL CONCAT() function with NULL.

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An assessment of the performance of several methods of string concatenation...

An assessment of the performance of several methods of string concatenation in the Python progamming language.

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Concatenate strings in the Series/Index with given separator. If None, retu...

Concatenate strings in the Series/Index with given separator. If None, returns str concatenating strings of the Series. sep: string or None, default None.

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Note even though Python is unlike C in that it doesn't rely on a trail...

Note even though Python is unlike C in that it doesn't rely on a trailing NULL to terminate strings (we store each string's length), it does by.

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I set "s" to a NULL string initially, instead of a list. . a = [1...

I set "s" to a NULL string initially, instead of a list. . a = [1,2] b = [3,4] print a + b # [ 1, 2, 3, 4] This is concatenating dwn.220.v.ua(b) print a # [ 1, 2, [3, .. worked for me. found extend in the "data structures" python documentation.

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Concatenates two strings on either side of the || symbol and returns the op...

Concatenates two strings on either side of the || symbol and returns the operator, if one or both strings is null, the result of the concatenation is null.

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There are two ways of doing string concatenation in JavaScript. forget dwn....

There are two ways of doing string concatenation in JavaScript. forget dwn.220.v.ua() which can be used like ""dwn.220.v.ua(null, [ "a", "b".

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I am trying to concatenate two fields in a query, but if one of the tow is ...

I am trying to concatenate two fields in a query, but if one of the tow is empty, it is not returning anything. Here is what I am using: CONCAT.

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