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Pad a string with leading zeros so it's 3 characters long in SQL Server 2008
...ring that is up to 3 characters long when it's first created in SQL Server 2008 R2.
17 Answers
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Python: Continuing to next iteration in outer loop
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72
for i in ...:
for j in ...:
for k in ...:
if something:
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How to convert an enum type variable to a string?
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Is R's apply family more than syntactic sugar?
...ntly different performance:
> fibo <- function(n) {
+ if ( n < 2 ) n
+ else fibo(n-1) + fibo(n-2)
+ }
> system.time(for(i in 0:26) fibo(i))
user system elapsed
7.48 0.00 7.52
> system.time(sapply(0:26, fibo))
user system elapsed
7.50 0.00 7.54
> s...
Is unsigned integer subtraction defined behavior?
...t can be
represented by the resulting type.
(ISO/IEC 9899:1999 (E) §6.2.5/9)
As you can see, (unsigned)0 - (unsigned)1 equals -1 modulo UINT_MAX+1, or in other words, UINT_MAX.
Note that although it does say "A computation involving unsigned operands can never overflow", which might lead ...
SQL query for today's date minus two months
... select all the records in a table where their date of entry is older then 2 months.
5 Answers
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fork() branches more than expected?
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245
The fork() primitive often stretches the imagination. Until you get a feel for it, you should...
What's the opposite of head? I want all but the first N lines of a file
...xt file of unknown length, how can I read, for example all but the first 2 lines of the file? I know tail will give me the last N lines, but I don't know what N is ahead of time.
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What is the difference between float and double?
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528
Huge difference.
As the name implies, a double has 2x the precision of float[1]. In general a d...
John Carmack's Unusual Fast Inverse Square Root (Quake III)
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answered Aug 28 '09 at 21:52
RushyoRushyo
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