大约有 40,000 项符合查询结果（耗时：0.0498秒） [XML]
How to avoid warning when introducing NAs by coercion
... na = x %in% na.strings
x[na] = 0
x = as.numeric(x)
x[na] = NA_real_
x
}
as.num(c("1", "2", "X"), na.strings="X")
#[1] 1 2 NA
share
|
improve this answer
|
...
How do I convert datetime to ISO 8601 in PHP
...do I convert my time from 2010-12-30 23:21:46 to ISO 8601 date format? (-_-;)
6 Answers
...
Remove border radius from Select tag in bootstrap 3
....w3.org/Graphics/SVG/1.1/DTD/svg11.dtd"> <svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="14px" height="12px" viewBox="0 0 14 12" enable-background="new 0 0 14 12" xml:space="preserve"> <polygon points=...
Disable submit button when form invalid with AngularJS
...rmset, and therefore is required to have a name w/ a hyphen in it (like "my_formset_name-0")?
– trubliphone
Oct 7 '15 at 4:08
2
...
Parse query string in JavaScript [duplicate]
... == aboutus.aspx
And to parse the query string of current page:-
var $_GET = URI(document.URL).query(true); // ala PHP
alert($_GET['dest']); // == aboutus.aspx
share
|
improve this answer...
Eclipse IDE: How to zoom in on text?
...de.google.com/p/tarlog-plugins/downloads/detail?name=tarlog.eclipse.plugins_1.4.2.jar&can=2&q=
It has some other features for eclipse, amongst which is Ctrl++ and Ctrl+- to change the font size, it's frickin' awesome.
...
Append to a file in Go
...
This answers works in Go1:
f, err := os.OpenFile(filename, os.O_APPEND|os.O_WRONLY|os.O_CREATE, 0600)
if err != nil {
panic(err)
}
defer f.Close()
if _, err = f.WriteString(text); err != nil {
panic(err)
}
...
How to get the current date/time in Java [duplicate]
...here's the way to do it:
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(Calendar.getInstance().getTime());
share
|
improve this answer
|
follow
...
Include constant in string without concatenating
...
Yes it is (in some way ;) ):
define('FOO', 'bar');
$test_string = sprintf('This is a %s test string', FOO);
This is probably not what you were aiming for, but I think, technically this is not concatenation but a substitution and from this assumption, it includes a constant in a ...
NullPointerException in Java with no StackTrace
...roduction – and the fix
I've tested it on Mac OS X
java version "1.6.0_26"
Java(TM) SE Runtime Environment (build 1.6.0_26-b03-383-11A511)
Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02-383, mixed mode)
Object string = "abcd";
int i = 0;
while (i < 12289) {
i++;
try {
In...