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How to delete duplicate rows in SQL Server?
...TE from search
where id not in (
select min(id) from search
group by url
having count(*)=1
union
SELECT min(id) FROM search
group by url
having count(*) > 1
)
share
|
impr...
How to discard local changes in an SVN checkout?
...se a directory name that does not exist, here using subdirectory TMP/).
$ url=$(svn info . | awk '/^URL/ {print $2}')
$ svn checkout "$url" TMP
Using that pristine svn checkout as a basis, init a git repository, ignoring .svn directories; commit everything in svn head to your temporary git reposit...
What are sessions? How do they work?
...st, you need a way to store user data between HTTP requests.
Cookies or URL parameters ( for ex. like http://example.com/myPage?asd=lol&boo=no ) are both suitable ways to transport data between 2 or more request.
However they are not good in case you don't want that data to be readable/editab...
How to include JavaScript file or library in Chrome console?
...s/script.js'); then it's relative to the document but it can load absolute urls as well, eg. $.getScript('https://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.6.0/underscore.js');
– rsp
May 16 '14 at 0:38
...
How does facebook, gmail send the real time notification?
... short, I will use jQuery:
function pollTask() {
$.ajax({
url: '/api/Polling',
async: true, // by default, it's async, but...
dataType: 'json', // or the dataType you are working with
timeout: 10000, // IMPORTANT! this is a 10 second...
Set a persistent environment variable from cmd.exe
...PCA_API_KEY_ID=key_id
set APCA_API_SECRET_KEY=secret_key
set APCA_API_BASE_URL=https://paper-api.alpaca.markets
:: setx also for other windows and processes going forward
setx APCA_API_KEY_ID %APCA_API_KEY_ID%
setx APCA_API_SECRET_KEY %APCA_API_SECRET_KEY%
setx APCA_API_BASE_URL %APCA_API_BAS...
How can I sanitize user input with PHP?
...{
$flags = NULL;
switch($type)
{
case 'url':
$filter = FILTER_SANITIZE_URL;
break;
case 'int':
$filter = FILTER_SANITIZE_NUMBER_INT;
break;
case 'float':
$filter = FILT...
Is it possible to prevent an NSURLRequest from caching data or remove cached data following a reques
On iPhone, I perform a HTTP request using NSURLRequest for a chunk of data. Object allocation spikes and I assign the data accordingly. When I finish with the data, I free it up accordingly - however instruments doesn't show any data to have been freed!
...
How to post JSON to a server using C#?
...orking is:
var httpWebRequest = (HttpWebRequest)WebRequest.Create("http://url");
httpWebRequest.ContentType = "application/json";
httpWebRequest.Method = "POST";
using (var streamWriter = new StreamWriter(httpWebRequest.GetRequestStream()))
{
string json = "{\"user\":\"test\"," +
...
数据存储组件 · App Inventor 2 中文网
...Google Sheets file you want to edit. You can find the spreadsheetID in the URL of the Google Sheets file.
事件
ErrorOccurred(errorMessage)
Triggered whenever an API call encounters an error. Details about the error are in errorMessage.
FinishedAddCol(columnNumber)
The callback event fo...