大约有 40,000 项符合查询结果（耗时：0.0426秒） [XML]
convert ArrayList to JSONArray
...List is a subclass of Collection) like so:
ArrayList<String> list = new ArrayList<String>();
list.add("foo");
list.add("baar");
JSONArray jsArray = new JSONArray(list);
References:
jsonarray constructor:
http://developer.android.com/reference/org/json/JSONArray.html#JSONArray%28java...
Python/postgres/psycopg2: getting ID of row just inserted
...
cursor.execute("INSERT INTO .... RETURNING id")
id_of_new_row = cursor.fetchone()[0]
And please do not build SQL strings containing values manually. You can (and should!) pass values separately, making it unnecessary to escape and SQL injection impossible:
sql_string = "INSER...
What is a predicate in c#? [duplicate]
I am very new to using predicates and just learned how to write:
4 Answers
4
...
How to check that an object is empty in PHP?
...
// $obj is type stdClass and we want to check if it's empty
if ( $obj == new stdClass() )
{
echo "Object is empty"; // JSON: {}
}
else
{
echo "Object has properties";
}
Source: http://php.net/manual/en/language.oop5.object-comparison.php
Edit: added example
$one = new stdClass();
$two ...
How do I copy the contents of one stream to another?
... static void CopyStream(Stream input, Stream output)
{
byte[] buffer = new byte[32768];
int read;
while ((read = input.Read(buffer, 0, buffer.Length)) > 0)
{
output.Write (buffer, 0, read);
}
}
Note 1: This method will allow you to report on progress (x bytes read so...
Resource interpreted as Document but transferred with MIME type application/zip
...
I've fixed this…by simply opening a new tab.
Why it wasn't working I'm not entirely sure, but it could have something to do with how Chrome deals with multiple downloads on a page, perhaps it thought they were spam and just ignored them.
...
importing pyspark in python shell
...s I have the same issue. (See http://geekple.com/blogs/feeds/Xgzu7/posts/351703064084736)
19 Answers
...
Hide Utility Class Constructor : Utility classes should not have a public or default constructor
...ooUtilityService.
*/
final class FooUtilityService{
/**
* Instantiates a new FooUtilityService. Private to prevent instantiation
*/
private FooUtilityService() {
// Throw an exception if this ever *is* called
throw new AssertionError("Instantiating utility class.");
}
...
how to get request path with express req object
...'/admin', function (req, res, next) { // GET 'http://www.example.com/admin/new?a=b'
console.dir(req.originalUrl) // '/admin/new?a=b' (WARNING: beware query string)
console.dir(req.baseUrl) // '/admin'
console.dir(req.path) // '/new'
console.dir(req.baseUrl + req.path) // '/admin/new' (full p...
In a django model custom save() method, how should you identify a new object?
...ial action in the save() method of a Django model object when I'm saving a new record (not updating an existing record.)
13...