大约有 44,000 项符合查询结果（耗时：0.0200秒） [XML]
Stripping out non-numeric characters in string
...did a simple comparison of Regex vs. LINQ on a string constructed from 100,000 GUIDs joined together (resulting in a 3,600,000 character string). Regex was consistently around half a second, whereas LINQ consistently was in the 1/10 of a second range. Basically LINQ was 5 or more times faster on ave...
horizontal line and right way to code it in html, css
...s
.hline-bottom {
padding-bottom: 10px;
border-bottom: 2px solid #000; /* whichever color you prefer */
}
and use it like
<div class="block_1 hline-bottom">Cheese</div>
share
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JOIN queries vs multiple queries
...id:
Single query with 5 Joins
query: 8.074508 seconds
result size: 2268000
5 queries in a row
combined query time: 0.00262 seconds
result size: 165 (6 + 50 + 7 + 12 + 90)
.
Note that we get the same results in both cases (6 x 50 x 7 x 12 x 90 = 2268000)
left joins use exponentially more m...
Placing Unicode character in CSS content value [duplicate]
...\2193";
}
The general format for a Unicode character inside a string is \000000 to \FFFFFF – a backslash followed by six hexadecimal digits. You can leave out leading 0 digits when the Unicode character is the last character in the string or when you add a space after the Unicode character. See ...
Convert form data to JavaScript object with jQuery
...onger cater to individual users with IE8, but when an organization with 10,000 employees that all use IE8 comes along...that's different. Fortunately, Microsoft is working hard on that problem.
– Ethan Brown
How to check whether dynamically attached event listener exists or not?
...t;!-- A Test HTML element -->
<div id = "test" style = "background:#000; height:50px; width: 50px"></div>
Although more than 5 years have passed since the OP posted the question, I believe people who stumble upon it in the future will benefit from this answer, so feel free t...
How to use double or single brackets, parentheses, curly braces
...to evaluate quite a lot quicker than single ones.
$ time for ((i=0; i<10000000; i++)); do [[ "$i" = 1000 ]]; done
real 0m24.548s
user 0m24.337s
sys 0m0.036s
$ time for ((i=0; i<10000000; i++)); do [ "$i" = 1000 ]; done
real 0m33.478s
user 0m33.478s
sys 0m0.000s
The braces, in ...
Javascript calculate the day of the year (1 - 366)
...new Date(now.getFullYear(), 0, 0);
var diff = now - start;
var oneDay = 1000 * 60 * 60 * 24;
var day = Math.floor(diff / oneDay);
console.log('Day of year: ' + day);
Edit: The code above will fail when now is a date in between march 26th and October 29th andnow's time is before 1AM (eg 00...
Android selector & text color
...>
<item android:state_pressed="true"
android:color="#000000" /> <!-- pressed -->
<item android:state_focused="true"
android:color="#000000" /> <!-- focused -->
<item android:color="#FFFFFF" /> <!-- default -->
</selector...
Get String in YYYYMMDD format from JS date object?
...g. in GMT+1: (new Date(2013,13, 25)).toISOString() == '2013-12-24T23:00:00.000Z'
– weberste
Dec 12 '13 at 10:23
...