大约有 40,000 项符合查询结果（耗时：0.0486秒） [XML]
What is the difference between a pseudo-class and a pseudo-element in CSS?
...neven rows which aren't dividable by 5 white and every other row magenta.
table tr:nth-child(2n) td{
background-color: #ccc;
}
table tr:nth-child(2n+1) td{
background-color: #fff;
}
table tr:nth-child(2n+1):nth-child(5n) td{
background-color: #f0f;
}
Pseudo-elements
Official descripti...
Sync data between Android App and webserver [closed]
...
For example, you want to sync table todoTable from MySql to Sqlite
First, create one column name version (type INT) in todoTable for both Sqlite and MySql
Second, create a table name database_version with one column name currentVersion(INT)
In MySql,...
How to draw a circle with text in the middle?
...can make border-radius:50%; that makes your code event more elegant and portable, without having to change this attribute each time based on the width and height ;)
– bonCodigo
Aug 14 '14 at 10:37
...
Best practices for styling HTML emails [closed]
...t tag and all it's contents).
Against your better judgement, use and abuse tables. <div>s just won't cut it (especially in Outlook).
Don't use background images, they're spotty and will annoy you.
Remember that some email clients will automatically transform typed out hyperlinks into links (i...
How to get the max of two values in MySQL?
...ll. E.g. select greatest(date1, ifnull(date2, "0000-00-00 00.00:00")) from table1 where date2 is null; will get you date1.
– Christoph Grimmer-Dietrich
Nov 5 '14 at 14:24
1
...
Difference between Activity Context and Application Context
...
I found this table super useful for deciding when to use different types of Contexts:
An application CAN start an Activity from here, but it requires that a new task be created. This may fit specific use cases, but can create non-sta...
SQL Query Where Field DOES NOT Contain $x
... what is x.b? your letters are very very confusing. I recommend using table or field.
– Whitecat
Aug 24 '15 at 21:10
...
What is the maximum length of latitude and longitude? [closed]
...nd a 0.1 decimal degree difference represents a ~11 km distance.
Here is a table of # decimal places difference in latitude with the delta degrees and the estimated distance in meters using 0,0 as the starting point.
decimal decimal distance
places degrees (in meters)
------- --------- -...
Mod of negative number is melting my brain
...he way, here's a reason why using a single % might be a good idea. See the table What things cost in managed code in the article Writing Faster Managed Code: Know What Things Cost. Using % is similarly expensive to int div listed in the table: about 36 times more expensive than adding or subtracting...
What is this: [Ljava.lang.Object;?
...[I@xxxxx
System.out.println(Arrays.toString(nums));
// [1, 2, 3]
int[][] table = {
{ 1, },
{ 2, 3, },
{ 4, 5, 6, },
};
System.out.println(Arrays.toString(table));
// [[I@xxxxx, [I@yyyyy, [I@zzzzz]
System.out.println(Arrays.deepToString(table));
// [[1], [2, 3], [4, 5, 6]]...