大约有 15,000 项符合查询结果（耗时：0.0176秒） [XML]
How do I iterate over an NSArray?
....24 454
77,969 258 0.57 453
100,000 390 0.73 534
The classes provided by Cocoa for handling data sets (NSDictionary, NSArray, NSSet etc.) provide a very nice interface for managing information, without having to worry about ...
How to overcome root domain CNAME restrictions?
...mod_rewrite.
We have a client server running Apache 2.2 with just under 3,000 domains and nearly 4,000 redirects, however, the load on the server hover around 0.10 - 0.20.
share
|
Copy a file in a sane, safe and efficient way
...man-pages/man2/sendfile.2.html
sendfile() will transfer at most 0x7ffff000 (2,147,479,552) bytes,
returning the number of bytes actually transferred. (This is true on
both 32-bit and 64-bit systems.)
share
...
How to replace a character by a newline in Vim
...wq
(echo 'After:'; xxd test) >> output.txt
more output.txt
Before:
0000000: 6261 720a bar.
After:
0000000: 000a 720a ..r.
In other words, \n has inserted the byte 0x00 into the text; \r has inserted the byte 0x0a.
...
Fastest way to serialize and deserialize .NET objects
... static void Main(string[] args)
{
var count = 100000;
var rnd = new Random(DateTime.UtcNow.GetHashCode());
Console.WriteLine("Generating {0} arrays of data...", count);
var arrays = new List<int[]>();
for (int i = 0; i...
How can I link to a specific glibc version?
...ifying a symbol version may be necessary still.
– 0xC0000022L
May 4 '17 at 9:10
add a comment
|
...
How can we match a^n b^n with Java regex?
...the finalized pattern, with additional test cases, including one that's 10,000 characters long:
$tests = array(
'aaa', 'aaab', 'aaaxb', 'xaaab', 'b', 'abbb', 'aabb', 'aaabbbbb', 'aaaaabbb',
'', 'ab', 'abb', 'aab', 'aaaabb', 'aaabbb', 'bbbaaa', 'ababab', 'abc',
str_repeat('a', 5000).str_repeat(...
C# List of objects, how do I get the sum of a property
... @Coops - To answer your question...using a list containing 100,000 objects, each object having a single property of datatype double, summing up the property 1,000 times using solution above (myList.Sum) takes 2.44 seconds compared to 0.98 seconds using foreach. The elapsed time is measur...
how to permit an array with strong parameters
...title"=>"Something", "time_span"=>[{"start"=>"2017-05-06T16:00:00.000Z", "end"=>"2017-05-06T17:00:00.000Z"}]}}
Then this is how I got it to work:
params.require(:link).permit(:title, time_span: [[:start, :end]])
...
Count(*) vs Count(1) - SQL Server
...utation intensive function.
In my test database, t_even is a table with 1,000,000 rows
This query:
SELECT COUNT(SYS_GUID())
FROM t_even
runs for 48 seconds, since the function needs to evaluate each SYS_GUID() returned to make sure it's not a NULL.
However, this query:
SELECT COUNT(*)
FR...