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How do I call Objective-C code from Swift?
...-C and C code from Swift and vice versa and has recommendations for how to convert a project or mix and match Objective-C/C and Swift parts in an existing project.
The compiler automatically generates Swift syntax for calling C functions and Objective-C methods. As seen in the documentation, this O...
What is the difference between tinyint, smallint, mediumint, bigint and int in MySQL?
...nyint data types. Values are inserted into each column and returned in the SELECT statement.
CREATE TABLE dbo.MyTable
(
MyBigIntColumn bigint
,MyIntColumn int
,MySmallIntColumn smallint
,MyTinyIntColumn tinyint
);
GO
INSERT INTO dbo.MyTable VALUES (9223372036854775807, 214483647,32767,255);...
How to split strings across multiple lines in CMake?
...ERSION_LIST})
-- Version: 1.0.0-rc1
If you really need a string, you can convert the list to a string first:
string(REPLACE ";" "" MYPROJ_VERSION "${MYPROJ_VERSION_LIST}")
message(STATUS "Version: ${MYPROJ_VERSION}")
-- Version: 1.0.0-rc1
Any semicolons in your original strings will be seen as ...
Exact difference between CharSequence and String in java [duplicate]
...SR 378 again…
Using "one-dimensional" string literals.
String query = "SELECT \"EMP_ID\", \"LAST_NAME\" FROM \"EMPLOYEE_TB\"\n" +
"WHERE \"CITY\" = 'INDIANAPOLIS'\n" +
"ORDER BY \"EMP_ID\", \"LAST_NAME\";\n";
Using a "two-dimensional" block of text
String query =...
Is there a timeout for idle PostgreSQL connections?
...ement an idle connection reaper. Have a cron job run something like this:
SELECT pg_terminate_backend(pid)
FROM pg_stat_activity
WHERE datname = 'regress'
AND pid <> pg_backend_pid()
AND state = 'idle'
AND state_change < current_timestamp - INTERVAL '5' MINUTE;
...
Can I have multiple primary keys in a single table?
...hese practices, but there is nothing in the relational model that requires selecting a primary key among the candidate keys.
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How do I force Postgres to use a particular index?
...d, client_id, date, and description. You want to run the following query:
SELECT client_id, SUM(amount)
FROM transactions
WHERE date >= 'yesterday'::timestamp AND date < 'today'::timestamp AND
description = 'Refund'
GROUP BY client_id
PostgreSQL may choose to use the index transaction...
Difference between string and char[] types in C++
... and certain functions may only accept a string as input, requiring you to convert the array to a string. It's better to use strings, they were made so that you don't have to use arrays. If arrays were objectively better we wouldn't have strings.
...
Can I incorporate both SignalR and a RESTful API?
I have a single page web app developed using ASP.NET. I recently converted many of the web methods to be push based, using the SignalR library. This really sped up the page considerably and reduced a lot of the server calls from the page.
...
Docker - a way to give access to a host USB or serial device?
...ber. Some common device major numbers:
81: usb webcams
188: usb to serial converters
Step 2
Add rules when you start the docker container:
Add a --device-cgroup-rule='c major_number:* rmw' rule for every type of device you want access to
Add access to udev information so docker containers can get...