大约有 47,000 项符合查询结果（耗时：0.0441秒） [XML]
Right query to get the current number of connections in a PostgreSQL DB
Which of the following two is more accurate?
6 Answers
6
...
jQuery append() - return appended elements
I'm using jQuery.append() to add some elements dynamically. Is there any way to get a jQuery collection or array of these newly inserted elements?
...
Disable messages upon loading a package
I have a package in R (ROCR) that I need to load in my R environment. Upon loading the package, a set of messages are printed. This is ordinarily fine, but since the output of my R script is being used for further analysis I want to completely disable all of this output. How do I do that? Furthe...
How do you create optional arguments in php?
In the PHP manual, to show the syntax for functions with optional parameters, they use brackets around each set of dependent optional parameter. For example, for the date() function, the manual reads:
...
Checking if output of a command contains a certain string in a shell script
I'm writing a shell script, and I'm trying to check if the output of a command contains a certain string. I'm thinking I probably have to use grep, but I'm not sure how. Does anyone know?
...
POST data in JSON format
I have some data that I need to convert to JSON format and then POST it with a JavaScript function.
4 Answers
...
How to get correct timestamp in C#
I would like to get valid timestamp in my application so I wrote:
5 Answers
5
...
Grasping the Node JS alternative to multithreading
If I understand correctly Node JS is non blocking...so instead of waiting for a response from a database or other process it moved on to something else and checks back later.
...
How to set a Javascript object values dynamically?
It's difficult to explain the case by words, let me give an example:
6 Answers
6
...
How to change position of Toast in Android?
When I use Toast to display some popup text on the screen, it displays the text a little bit above the bottom of the screen, which is the default position.
...