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Group by with multiple columns using lambda
....Key.Country == "Ireland" && a.Key.Gender == "M")
.SelectMany(a => a)
.ToList();
Where CustomerGroupingKey takes the group keys:
private class CustomerGroupingKey
{
public CustomerGroupingKey(string country, string gender)
{
...
Query a parameter (postgresql.conf setting) like “max_connections”
... SHOW, such as minimum
and maximum values.
For your original request:
SELECT *
FROM pg_settings
WHERE name = 'max_connections';
Finally, there is current_setting(), which can be nested in DML statements:
SELECT current_setting('max_connections');
Related:
How to test my ad-hoc SQL wit...
Authentication issue when debugging in VS2013 - iis express
...4 to get the project properties when you have the top level of the project selected. Do not right click on the project and select properties, this is something entirely different.
Change Anonymous Authentication to be Disabled and Windows Authentication to be Enabled.
Works like gravy :)
...
How to make Twitter bootstrap modal full screen
...adding issues, try right+clicking (or cmd+clicking on mac) the element and select "inspect element" on Chrome or "inspect element with firebug" on Firefox. Try selecting different HTML elements in the "elements" panel and editing the CSS on the right in real-time until you get the padding / spacing...
How can I turn a List of Lists into a List in Java 8?
... .collect(Collectors.toList())
This is would be similar in SQL to having SELECT statements within SELECT statements.
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Getting file names without extensions
... Directory.GetFiles(@"c:\", "*.txt")
.Select(filename =>
Path.GetFileNameWithoutExtension(filename)));
I dislike the DirectoryInfo, FileInfo for this scenario.
DirectoryInfo and FileInfo collect more data about the folder and the...
How to query as GROUP BY in django?
...nnotate(dcount=Count('designation'))
This results in a query similar to
SELECT designation, COUNT(designation) AS dcount
FROM members GROUP BY designation
and the output would be of the form
[{'designation': 'Salesman', 'dcount': 2},
{'designation': 'Manager', 'dcount': 2}]
...
Change EOL on multiple files in one go
...after googling for 1 hour is this:
install PyCham trial mode,
open and select your Project Folder/Folders and follow the screenshot
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Unsupported major.minor version 52.0 [duplicate]
...s of your IDE. For example, in Eclipse go to menu Windows → Preferences, select Java, and expand it. Then select Compiler and change the compliance level to 1.7. I am sure this will work from there.
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How to show google.com in an iframe?
...t('script');
script.src = 'https://query.yahooapis.com/v1/public/yql?q=select%20*%20from%20data.headers%20where%20url%3D%22' + encodeURIComponent(url) + '%22&format=json&diagnostics=true&env=store%3A%2F%2Fdatatables.org%2Falltableswithkeys&callback=getData';
document.body.app...