大约有 30,000 项符合查询结果（耗时：0.0456秒） [XML]
Extract substring using regexp in plain bash
...
Very clean, and avoids calls to external programs.
– Victor Zamanian
Aug 2 '17 at 8:20
9
...
Grepping a huge file (80GB) any way to speed it up?
...
@elcortegano: That's what's called I/O redirection. Basically, it reads input from the following filename. Similar to cat file.sql | parallel ... but avoids a UUOC. GNU parallel also has a way to read input from a file using parallel ... :::: file.sql. ...
How do I make an Android EditView 'Done' button and hide the keyboard when clicked?
When the user clicks on the EditView , Android opens the keyboard so that user can write in the EditView .
17 Answers
...
How can I create a unique constraint on my column (SQL Server 2008 R2)?
...kground an unique index for the added constraint
create table Customer ( id int primary key identity (1,1) , name nvarchar(128) )
--Commands completed successfully.
sp_help Customer
---> index
--index_name index_description index_keys
--PK__Customer__3213E83FCC4A1DFA clustered, uniq...
How to deserialize a list using GSON or another JSON library in Java?
...at doesn't implement some useful methods like add(), delete(), etc. If you call them an UnsupportedOperationException will be thrown.
In order to get real ArrayList instance you need to write something like this:
List<Video> = new ArrayList<>(Arrays.asList(videoArray));
...
Simple calculations for working with lat/lon and km distance?
... expressed in degrees, while the cos function in most (all?) languages typically accepts radians, therefore a degree to radians conversion is needed.
share
|
improve this answer
|
...
How to format current time using a yyyyMMddHHmmss format?
...l the people that want to use another format, remember that you can always call to:
t := time.Now()
t.Year()
t.Month()
t.Day()
t.Hour()
t.Minute()
t.Second()
For example, to get current date time as "YYYY-MM-DDTHH:MM:SS" (for example 2019-01-22T12:40:55) you can use these methods with fmt.S...
How to move an iFrame in the DOM without losing its state?
...show that even using native JavaScript the iFrames still reload:
http://jsfiddle.net/pZ23B/
var wrap1 = document.getElementById('wrap1');
var wrap2 = document.getElementById('wrap2');
setTimeout(function(){
document.getElementsByTagName('body')[0].appendChild(wrap1);
},10000);
...
Getting URL hash location, and using it in jQuery
...Actually you don't need the :first pseudo-selector since you are using the ID selector, is assumed that IDs are unique within the DOM.
In case you want to get the hash from an URL string, you can use the String.substring method:
var url = "http://example.com/file.htm#foo";
var hash = url.substring...
MySQL Results as comma separated list
...
You can use GROUP_CONCAT to perform that, e.g. something like
SELECT p.id, p.name, GROUP_CONCAT(s.name) AS site_list
FROM sites s
INNER JOIN publications p ON(s.id = p.site_id)
GROUP BY p.id, p.name;
share
|
...