大约有 5,475 项符合查询结果（耗时：0.0178秒） [XML]
Preferred method to store PHP arrays (json_encode vs serialize)
...ly %01.2f%% faster than serialize()\n", ($serializeTime / $jsonTime - 1) * 100);
}
else if ($serializeTime < $jsonTime ) {
printf("serialize() was roughly %01.2f%% faster than json_encode()\n", ($jsonTime / $serializeTime - 1) * 100);
} else {
echo "Impossible!\n";
}
function fillArray( ...
How to convert a column number (e.g. 127) into an Excel column (e.g. AA)
...010 goes up to column XFD), so maximum of 2 string concatenations. (I used 100 iterations of translating the integers 1 to 16384, i.e. Excel columns A to XFD, as the test).
– Graham
May 4 '11 at 19:06
...
When to use IMG vs. CSS background-image?
...t;</div>
...and CSS:
#headerImage {
width: 200px;
height: 100px;
background: url(Images/headerImage.png) no-repeat;
}
A few days later, you change the location of the image. All you have to do is update the CSS:
#headerImage {
width: 200px;
height: 100px;
backgrou...
How does Google's Page Speed lossless image compression work?
...with these options:
WebpConfiguration()
: lossless(true), quality(100), method(3), target_size(0),
alpha_compression(0), alpha_filtering(1), alpha_quality(100) {}
There is also image_converter.cc which is used to losslessly convert to the smallest format.
...
Should I index a bit field in SQL Server?
...
100-million records with only a few having the bit field set to 1? Yes, I would think indexing the bit field would definitely speed up querying the bit=1 records. You should get logarithmic search time from the index and then...
Is a Java hashmap search really O(1)?
...ts, it makes no difference whether it's closer to O(1) or not. Even O(n/10^100) is still O(n). I get your point about efficiency bringing then ratio down but that still puts the algorithm at O(n).
– paxdiablo
Jun 28 '09 at 16:59
...
Using the scrollwheel in GNU screen
...(you need to log out for this to take effect):
XTerm*saveLines: 0
XTerm*vt100.translations: #override \n\
Ctrl <Btn4Down>: string(0x1b) string("[25S") \n\
Lock Ctrl <Btn4Down>: string(0x1b) string("[25S") \n\
Lock @Num_Lock Ctrl <Btn4Down>: string(0x1b) string("[25S") \n\
...
Search all tables, all columns for a specific value SQL Server [duplicate]
...blog post as I do update it from time to time
DECLARE @SearchStr nvarchar(100)
SET @SearchStr = '## YOUR STRING HERE ##'
-- Copyright © 2002 Narayana Vyas Kondreddi. All rights reserved.
-- Purpose: To search all columns of all tables for a given search string
-- Written by: Narayana Vyas Ko...
Git: How to rebase to a specific commit?
...
100
You can avoid using the --onto parameter by making a temp branch on the commit you like and th...
if a ngSrc path resolves to a 404, is there a way to fallback to a default?
... this error function has been called
if (w <= 20) { w = 100; }
if (h <= 20) { h = 100; }
var url = 'http://placehold.it/' + w + 'x' + h + '/cccccc/ffffff&text=Oh No!';
element.prop('src', url);
element.css('bor...