大约有 5,883 项符合查询结果（耗时：0.0178秒） [XML]
Filter data.frame rows by a logical condition
...
we can use data.table library
library(data.table)
expr <- data.table(expr)
expr[cell_type == "hesc"]
expr[cell_type %in% c("hesc","fibroblast")]
or filter using %like% operator for pattern matching
expr[cell_type %like% "hesc...
How to return only the Date from a SQL Server DateTime datatype
...PU time taken to perform all the pieces. If both queries are run against a table with millions of rows, the CPU time using DateDiff can be close to 1/3rd of the Convert CPU time!
To see execution plans for queries:
set showplan_text on
GO
Both DATEADD and DATEDIFF will execute a CONVERT_IMPLICI...
How can I horizontally align my divs?
... align just one div horizontally you could do this:
#MyDIV
{
display: table;
margin: 0 auto;
}
share
|
improve this answer
|
follow
|
...
Markdown `native` text alignment
...ky but if you're using GFM or some other MD syntax which supports building tables with pipes you can use the column alignment features:
|| <!-- empty table header -->
|:--:| <!-- table header/body separator with center formatting -->
| I'm centered! | <!-- cell gets column's alignmen...
How to align a div to the top of its parent but keeping its inline-block behaviour?
...
Or you could just add some content to the div and use inline-table
share
|
improve this answer
|
follow
|
...
How to get these two divs side-by-side?
...
I still think display: table-cell will get results closer to what he means (since then they will have the same height etcetera) but this way will certainly work.
– ehdv
Mar 22 '11 at 6:09
...
How to resize superview to fit all subviews with autolayout?
...ork as long as your constraints are correct. If you want to use it on a UITableViewCell (to determine row height for example) then you should call it against your cell contentView and grab the height.
Further considerations exist if you have one or more UILabel's in your view that are multiline....
Wolfram's Rule 34 in XKCD [closed]
...using a Turing machine. The idea of a Turing machine is essentially that a table of data can be used to run computations on other data (i.e. a program is the first table and the input and output are the other table).
The first table (the program) gives rules that tell the machine what to do with th...
Using LIMIT within GROUP BY to get N results per group?
...LECT id, GROUP_CONCAT(year ORDER BY rate DESC) grouped_year
FROM yourtable
GROUP BY id
Result:
-----------------------------------------------------------
| ID | GROUPED_YEAR |
-----------------------------------------------------------
| p01 | 2006,200...
What is the ideal data type to use when storing latitude / longitude in a MySQL database?
...
FYI; Mysql support spatial index only with *.myisam tables, i.e. the ISAM engine. Link: dev.mysql.com/doc/refman/5.0/en/creating-spatial-indexes.html
– PodTech.io
Jan 15 '17 at 5:46
...