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Shall we always use [unowned self] inside closure in Swift
...ining the difference between using strong, weak, and unowned in closures:
https://developer.apple.com/library/content/documentation/Swift/Conceptual/Swift_Programming_Language/AutomaticReferenceCounting.html
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MySQL, update multiple tables with one query
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Can a Windows batch file determine its own file name?
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What is the difference between encode/decode?
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Java: difference between strong/soft/weak/phantom reference
...now the object to which it pointed is dead.
This text was extracted from: https://weblogs.java.net/blog/2006/05/04/understanding-weak-references
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How to UPSERT (MERGE, INSERT … ON DUPLICATE UPDATE) in PostgreSQL?
...ons that might occur.
Cross-posting from another answer I gave yesterday (https://stackoverflow.com/a/44395983/2156909)
SQLAlchemy supports ON CONFLICT now with two methods on_conflict_do_update() and on_conflict_do_nothing():
Copying from the documentation:
from sqlalchemy.dialects.postgresql i...
Set cursor position on contentEditable
...amily: Arial;
outline: 1px solid rgba(0,0,0,0.5);
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div contentEditable="true"></div>
<div contentEditable="true"></div>
<div contentEditable="true"></div&...
App.Config Transformation for projects which are not Web Projects in Visual Studio?
...
Inspired by Oleg and others in this question, I took the solution https://stackoverflow.com/a/5109530/2286801 a step further to enable the following.
Works with ClickOnce
Works with Setup and Deployment projects in VS 2010
Works with VS2010, 2013, 2015 (didn't test 2012 although should ...
Table fixed header and scrollable body
...gt;
</tbody>
</table>
</div>
<script src="https://code.jquery.com/jquery-3.1.0.js"></script>
Or plain ES6 if you prefer (no jQuery required):
// Fix table head
function tableFixHead (e) {
const el = e.target,
sT = el.scrollTop;
el.q...
How to implement common bash idioms in Python? [closed]
...reasonably complete user-interactive shell available at: http://xon.sh/ or https://github.com/scopatz/xonsh
The demonstration video does not show pipes being used, but they ARE supported when in the default shell mode.
Xonsh ('conch') tries very hard to emulate bash, so things you've already gaine...