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how to convert from int to char*?
... Tests: (Integer64ToCharArray();)
Best case 1 digit value.
Loops: 100,000,000, Time Spent: 1,381(Milli), Time Per Loop 13(Nano)
Worse Case 20 Digit Value.
Loops: 100,000,000, Time Spent: 22,656(Milli), Time Per Loop 226(Nano
New Design Speed Tests: (AddDynamicallyToBuffer();)
Best case...
Unicode equivalents for \w and \b in Java regular expressions?
...The short story is that my code rewrites those 14 as follows:
\s => [\u0009-\u000D\u0020\u0085\u00A0\u1680\u180E\u2000-\u200A\u2028\u2029\u202F\u205F\u3000]
\S => [^\u0009-\u000D\u0020\u0085\u00A0\u1680\u180E\u2000-\u200A\u2028\u2029\u202F\u205F\u3000]
\v => [\u000A-\u000D\u0085\u2028\u20...
TINYTEXT, TEXT, MEDIUMTEXT, and LONGTEXT maximum storage sizes
...o 1 byte per UTF-8 character, so I would divide by 6 giving around 40 / 10,000 / 2,700,000 / 710,000,000 words for the different sizes. Languages with lots of accents such as Polish would have slightly fewer words; Greek, Hebrew, Arabic, etc (with mostly 2-byte sequences) about half; CJK ideographs ...
How to iterate for loop in reverse order in swift?
...an array with one trillion Ints!
Test:
var count = 0
for i in lazy(1...1_000_000_000_000).reverse() {
if ++count > 5 {
break
}
println(i)
}
For Swift 2.0 in Xcode 7:
for i in (1...10).reverse() {
print(i)
}
Note that in Swift 2.0, (1...1_000_000_000_000).reverse()...
SQL NVARCHAR and VARCHAR Limits
... selection criteria the string containing the dynamic SQL is growing over 4000 chars. Now, I understand that there is a 4000 max set for NVARCHAR(MAX) , but looking at the executed SQL in Server Profiler for the statement
...
Select SQL Server database size
...15213.00 192.69 1191.13 15.55 2015-11-10 10:51:02.000 44.59 NULL NULL
10 locateme ONLINE SIMPLE 1050.13 591.00 2.94 459.13 6.91 2015-11-06 15:08:34.000 17.25 ...
How does database indexing work? [closed]
...
Example 1 - sorted vs unsorted fields
Given our sample database of r = 5,000,000 records of a fixed size giving a record length of R = 204 bytes and they are stored in a table using the MyISAM engine which is using the default block size B = 1,024 bytes. The blocking factor of the table would be b...
How to return only the Date from a SQL Server DateTime datatype
...EADD(dd, 0, DATEDIFF(dd, 0, GETDATE()))
gives me
2008-09-22 00:00:00.000
Pros:
No varchar<->datetime conversions required
No need to think about locale
As suggested by Michael
Use this variant: SELECT DATEADD(dd, DATEDIFF(dd, 0, getdate()), 0)
select getdate()
SELECT DATEADD(...
How expensive is RTTI?
...
I was doing a quick test using this:
GCC Clock() + XCode's Profiler.
100,000,000 loop iterations.
2 x 2.66 GHz Dual-Core Intel Xeon.
The class in question is derived from a single base class.
typeid().name() returns "N12fastdelegate13FastDelegate1IivEE"
5 Cases were tested:
1) dynamic_cast< Fi...
What are the options for storing hierarchical data in a relational database? [closed]
...e for one or the other especially if there are more than, say, a lousy 100,000 nodes or so. Using the push stack method can take a whole day to do the conversion on what MLM'ers would consider to be a small million node hierarchy.
I thought I'd give Celko a bit of competition by coming up with a m...