大约有 42,000 项符合查询结果（耗时：0.0605秒） [XML]
Assertion failure in dequeueReusableCellWithIdentifier:forIndexPath:
...
You're using the dequeueReusableCellWithIdentifier:forIndexPath: method. The documentation for that method says this:
Important: You must register a class or nib file using the registerNib:forCellReuseIdentifier: or registerClass:forCellReuseIdentifier: method...
jQuery UI accordion that keeps multiple sections open?
I may be an idiot, but how do you keep multiple sections in jQuery UI's accordion open? The demos all have only one open at a time... I'm looking for a collapseable menu type system.
...
How to publish a website made by Node.js to Github Pages?
...
GitHub pages host only static HTML pages. No server side technology is supported, so Node.js applications won't run on GitHub pages. There are lots of hosting providers, as listed on the Node.js wiki.
App fog seems to be the most economical as it provides free hosting for proj...
Factors in R: more than an annoyance?
... factors easily with droplevels() to drop unused factor levels for an individual factor or for every factor in a data.frame (since R 2.12):
x <- subset(iris, Species == 'setosa')
levels(x$Species)
# [1] "setosa" "versicolor" "virginica"
x <- droplevels(x)
levels(x$Species)
# [1] "setosa"...
Align contents inside a div
I use css style text-align to align contents inside a container in HTML. This works fine while the content is text or the browser is IE. But otherwise it does not work.
...
Safe String to BigDecimal conversion
...e it looks very odd when people have pointed out why your original answer didn't make any sense. :-)
– T.J. Crowder
Sep 20 '10 at 15:03
1
...
Angular.js ng-repeat across multiple tr's
I am using Angular.js for an application that uses hidden trs to simulate a sliding out effect by showing the tr and sliding down the div in the td below. This process worked fantastically using knockout.js when iterating over an array of these rows, because I could use <!-- ko:foreach --> a...
Date query with ISODate in mongodb doesn't seem to work
..."2012-01-01T15:00:00.000Z"}})
you'll get error:
error: { "$err" : "invalid operator: $date", "code" : 10068 }
Try this:
db.mycollection.find({
"dt" : {"$gte": new Date("2013-10-01T00:00:00.000Z")}
})
or (following comments by @user3805045):
db.mycollection.find({
"dt" : {"$gte": ISO...
Command line for looking at specific port
... Also worth mentioning the -o flag (i.e. -nao here) to include the PID of the process using the port.
– Steve Chambers
Nov 28 '17 at 10:29
add a comment
...
Is there an equivalent to background-size: cover and contain for image elements?
...r; on the img .
body {
margin: 0;
}
img {
display: block;
width: 100vw;
height: 100vh;
object-fit: cover;
}
<img src="http://lorempixel.com/1500/1000" />
See MDN - regarding object-fit: cover:
The replaced content is sized to maintain its aspect ratio while
...