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What's the use of do while(0) when we define a macro? [duplicate]
I'm reading the linux kernel and I found many macros like this:
2 Answers
2
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What does the message “rewrite … (90%)” after a Git commit mean? [duplicate]
...ta for files, but I just don't know how much of a rewrite the % represents and it doesn't seem to be in the help page for git help commit .
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Python-equivalent of short-form “if” in C++ [duplicate]
...ython 2.5+), a 1-to-1 equivalent of your version might be:
a = (b == True and "123" or "456" )
... which in python should be shortened to:
a = b is True and "123" or "456"
... or if you simply want to test the truthfulness of b's value in general...
a = b and "123" or "456"
? : can literall...
How should I organize Python source code? [closed]
I'm getting started with Python (it's high time I give it a shot), and I'm looking for some best practices.
2 Answers
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Use variable with TOP in select statement in SQL Server without making it dynamic [duplicate]
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it's completely weird...I wasn't aware of this and I got stuck for a few minutes on this. Thank you (+1)
– Christos
Feb 17 '16 at 10:37
7
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Why does javascript replace only first instance when using replace? [duplicate]
...chobo2 it didn't take away two slashes. There were only two to begin with, and it removed the first one.
– Doug Neiner
Dec 27 '09 at 21:45
6
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Oracle find a constraint
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select * from all_constraints
where owner = '<NAME>'
and constraint_name = 'SYS_C00381400'
/
Like all data dictionary views, this a USER_CONSTRAINTS view if you just want to check your current schema and a DBA_CONSTRAINTS view for administration users.
The construction of th...
On duplicate key ignore? [duplicate]
I'm trying to finish this query; my tag field is set to UNIQUE and I simply want the database to ignore any duplicate tag.
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php Replacing multiple spaces with a single space [duplicate]
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Use preg_replace() and instead of [ \t\n\r] use \s:
$output = preg_replace('!\s+!', ' ', $input);
From Regular Expression Basic Syntax Reference:
\d, \w and \s
Shorthand character classes matching
digits, word characters (letters,...
python ? (conditional/ternary) operator for assignments [duplicate]
C and many other languages have a conditional (aka ternary) operator. This allows you to make very terse choices between two values based on the truth of a condition, which makes expressions, including assignments, very concise.
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