大约有 37,000 项符合查询结果（耗时：0.0302秒） [XML]
How to prevent ifelse() from turning Date objects into numeric objects
...
You may use data.table::fifelse (data.table >= 1.12.3) or dplyr::if_else.
data.table::fifelse
Unlike ifelse, fifelse preserves the type and class of the inputs.
library(data.table)
dates <- fifelse(dates == '2011-01-01', dates - 1, d...
How to resize a tableHeaderView of a UITableView?
I'm having trouble resizing a tableHeaderView. It simple doesn't work.
19 Answers
19
...
Extract a dplyr tbl column as a vector
...yr tbl as a vector, from a tbl with database back-end (i.e. the data frame/table can't be subset directly)?
7 Answers
...
When to use SELECT … FOR UPDATE?
...
The only portable way to achieve consistency between rooms and tags and making sure rooms are never returned after they had been deleted is locking them with SELECT FOR UPDATE.
However in some systems locking is a side effect of concurr...
How can I escape a double quote inside double quotes?
..." sometimes
In your example, I would do it something like this:
$ dbtable=example
$ dbload='load data local infile "'"'gfpoint.csv'"'" into '"table $dbtable FIELDS TERMINATED BY ',' ENCLOSED BY '"'"'"' LINES "'TERMINATED BY "'"'\n'"'" IGNORE 1 LINES'
$ echo $dbload
which produces the follow...
AngularJS-Twig conflict with double curly braces
...Verbatim, is very elegant and readable for several angular variables:
<table ng-table>
{% verbatim %}
<tr ng-repeat="user in $data">
<td data-title="'Name'">{{user.name}}</td>
<td data-title="'Age'">{{user.age}}</td>
</tr>...
How to check if running in Cygwin, Mac or Linux?
...If you are doing that, it's your responsibility to ensure the correct executables (i.e., the CygWin ones) are being called, possibly by modifying the path beforehand or fully specifying the executable locations (e.g., /c/cygwin/bin/uname).
...
Expand a div to fill the remaining width
...
This would be a good example of something that's trivial to do with tables and hard (if not impossible, at least in a cross-browser sense) to do with CSS.
If both the columns were fixed width, this would be easy.
If one of the columns was fixed width, this would be slightly harder but entir...
Return a value if no rows are found in Microsoft tSQL
...ut instead of returning a 1, how can I get it to return the value from the table?
– Michael
Aug 10 '16 at 13:34
|
show 3 more comments
...
How do I use regex in a SQLite query?
...ou need to invoke it slightly differently though, like this: SELECT * FROM table WHERE column regexp("myregexp")
– Tristan
May 30 '14 at 17:16
...