大约有 30,000 项符合查询结果（耗时：0.0429秒） [XML]
How to run a background task in a servlet based web application?
... 5 seconds.
}
}
Yes, that's really all. The container will automatically pickup and manage it.
EJB unavailable? Use ScheduledExecutorService
If your environment doesn't support EJB (i.e. you're not using not a real Java EE server, but a barebones servletcontainer such as Tomcat, Jetty, etc...
Read a text file using Node.js?
...e it will buffer the entire contents of the file before yielding it to the callback function. This buffering could potentially use lots of memory but, more importantly, it does not take advantage of one of the core features of node.js - asynchronous, evented I/O.
The "node" way to process a large ...
How do I add a library project to Android Studio?
...d.gradle declaring how it gets built.
Additionally, there will be a file called settings.gradle at the root declaring the projects.
This gives the following structure:
MyProject/
| settings.gradle
+ app/
| build.gradle
+ libraries/
+ lib1/
| build.gradle
+ lib2/
| ...
CSS Selector “(A or B) and C”?
... digital computer can do can be decomposed into NAND gates, but I wouldn't call the rest of software engineering "a bunch of convenience functions." Differences of degree quickly become de facto differences of kind when constructs can be combined.
– Sarah G
May...
Compute a confidence interval from sample data
... Importing scipy does not necessarily import all the subpackages automatically. Better to import the sub-package scipy.stats explicitly.
– Vikram
Jul 2 '13 at 10:24
...
Authenticate Jenkins CI for Github private repository
...ally fetch data from my private repository hosted on Github.
But I have no idea how to accomplish that task.. Tried the documentation, generating ssh-key for jenkins user and all what I can see is: "unable to clone the repo". I've checked URLs - they are valid.
...
assign multiple variables to the same value in Javascript
...ame value. Whether or not it is preferable to the long way is a judgement call. It will likely be slower and may or may not be more readable. In your specific case, I think that the long way is probably more readable and maintainable as well as being faster.
The other way utilizes Destructuring ...
Automatically expanding an R factor into a collection of 1/0 indicator variables for every factor le
...
@colin, Not fully automatic, but you can use naresid to put the missing values back in after using na.exclude. A quick example: tmp <- data.frame(x=factor(c('a','b','c',NA,'a'))); tmp2 <- na.exclude(tmp); tmp3 <- model.matrix( ~x-1, tmp2); tmp4 <- naresid(attr(t...
Remove rows with all or some NAs (missing values) in data.frame
...
tidyr has a new function drop_na:
library(tidyr)
df %>% drop_na()
# gene hsap mmul mmus rnor cfam
# 2 ENSG00000199674 0 2 2 2 2
# 6 ENSG00000221312 0 1 2 3 2
df %>% drop_na(rn...
Extract elements of list at odd positions
...ot keep reference to the original list (in Numarray you need to explicitly call .copy() to have something not referencing original array). But it is nice to have something that may be better to some readers. Would you mind positing this link in the comment, so I can upvote it and it will appear just...