大约有 43,000 项符合查询结果（耗时：0.0597秒） [XML]
Get class name of object as string in Swift
...ct can be an instance variable like array, a dictionary, an Int, a NSDate, etc.
Because NSObject is the root class of most Objective-C class hierarchies, you could try to make an extension for NSObject to get the class name of every subclass of NSObject. Like this:
extension NSObject {
var the...
Set default CRAN mirror permanent in R
...tilde expansion). If this variable is
unset, the default is R_HOME/etc/Rprofile.site, which is used if
it exists (which it does not in a 'factory-fresh' installation).
So do Sys.getenv("R_PROFILE") for the first option, or Sys.getenv("R_HOME") or R.home() for the second option. On m...
How do I translate an ISO 8601 datetime string into a Python datetime object? [duplicate]
...u one without dashes, without colons, with a weeknumer instead of a month, etc.
– Peter
Oct 2 '13 at 16:08
2
...
What programming practice that you once liked have you since changed your mind about? [closed]
...t automatically clean themselves up, such as autoptr, scoped_ptr, CComPtr, etc.
– i_am_jorf
Jul 7 '09 at 2:54
3
...
LEN function not including trailing spaces in SQL Server
...
Also for varchar etc. this can be collation dependant and not even a straight forward division by 2 is reliable. See example here
– Martin Smith
Jul 13 '13 at 11:33
...
How to activate JMX on my JVM for access with jconsole?
...warded the ports when running the docker image: -p 9998:9998, -p 9999:9999 etc.
– Barney
Aug 6 '19 at 3:23
add a comment
|
...
Hidden Features of ASP.NET [closed]
...fig differences using other methods (Web Deployment Projects, Build tasks, etc)
– John Sheehan
Dec 7 '09 at 20:23
|
show 4 more comments
...
How to change the opacity (alpha, transparency) of an element in a canvas element after it has been
...5 <canvas> element, I would like to load an image file (PNG, JPEG, etc.), draw it to the canvas completely transparently, and then fade it in. I have figured out how to load the image and draw it to the canvas, but I don't know how to change its opacity once it as been drawn.
...
Javascript library for human-friendly relative date formatting [closed]
....
It supports timeago, formatting, parsing, querying, manipulating, i18n, etc.
Timeago (relative time) for dates in the past is done with moment().fromNow(). For example, to display January 1, 2019 in the timeago format:
let date = moment("2019-01-01", "YYYY-MM-DD");
console.log(date.fromNow...
'Static readonly' vs. 'const'
...into the call-site; this is double edged:
it is useless if the value is fetched at runtime, perhaps from config
if you change the value of a const, you need to rebuild all the clients
but it can be faster, as it avoids a method call...
...which might sometimes have been inlined by the JIT anyway
...