comma

I was reading the assignment statements in the Python docs ( http://docs.python.org/reference/simple_stmts.html#assignment-statements ). In that it is quoted that: If the target is a target list enclosed in parentheses or in square brackets: The object must be an iterable with the same number of items as there are targets in the target list, and its items are assigned, from left to right, to the corresponding targets. After reading it, I thought of writing a sample like this: a = 5 b = 4 a, b = a + b, a print a, b My assumption was that a and b both should have the value of 9. However, I am

I need to split comma delimited string into a second columns I have the following table : CL1 POS POS2 LENGHT ALLELE 1 3015108,3015109 5 A 2 3015110,3015200 10 B 3 3015200,3015300 15 C 4 3015450,3015500 20 D 5 3015600,3015700 15 E I want to split the numbers after the comma into a second column POS2 So it should like that CL1 POS POS2 LENGHT ALLELE 1 3015108 3015109 5 A 2 3015110 3015200 10 B 3 3015200 3015300 15 C 4 3015450 3015500 20 D 5 3015600 3015700 15 E So I've queried the following : INSERT INTO MyTable (POS2) SELECT RIGHT(POS, CHARINDEX(',', POS) + 1 ) FROM MyTable ; It returns an

Please explain me the output of this program: int main() { int a,b,c,d; a=10; b=20; c=a,b; d=(a,b); printf("\nC= %d",c); printf("\nD= %d",d); } The output which I am getting is: C= 10 D= 20 My doubt is what does the "," operator do here? I compiled and ran the program using Code Blocks. The , operator evaluates a series of expressions and returns the value of the last. c=a,b is the same as (c=a),b . That is why c is 10 c=(a,b) will assign the result of a,b , which is 20, to c . As Mike points out in the comments, assignment ( = ) has higher precedence than comma Well, this is about operator