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MySQL - UPDATE multiple rows with different values in one query
...ms to better fit the scenario you describe, is much easier to read, and avoids those difficult-to-untangle multiple conditions.
INSERT INTO table_users (cod_user, date, user_rol, cod_office)
VALUES
('622057', '12082014', 'student', '17389551'),
('2913659', '12082014', 'assistant','17389551'),
('616...
Determine what attributes were changed in Rails after_save callback?
I'm setting up an after_save callback in my model observer to send a notification only if the model's published attribute was changed from false to true. Since methods such as changed? are only useful before the model is saved, the way I'm currently (and unsuccessfully) trying to do so is as fol...
c# datatable to csv
...
I wrapped this up into an extension class, which allows you to call:
myDataTable.WriteToCsvFile("C:\\MyDataTable.csv");
on any DataTable.
public static class DataTableExtensions
{
public static void WriteToCsvFile(this DataTable dataTable, string filePath)
{
StringB...
Java executors: how to be notified, without blocking, when a task completes?
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Define a callback interface to receive whatever parameters you want to pass along in the completion notification. Then invoke it at the end of the task.
You could even write a general wrapper for Runnable tasks, and submit these to ...
Dynamically add script tag with src that may include document.write
I want to dynamically include a script tag in a webpage however I have no control of it's src so src="source.js" may look like this.
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How to remove from a map while iterating it?
...Thing, as the kludge relied on overridden-post-increment-within-a-function-call magic, "fixed" by newbie maintainers to take the increment out of the function call, or to swap it to a preincrement "because that's just a style thing", etc.
– Dewi Morgan
Jan 29 '...
Why seal a class?
...mplementations in the future. Inheritance also introduces uncertainty into callers as to exactly what they'll be calling into. It also doesn't mix well with immutability (which I'm a fan of). I only find class inheritance useful in a relatively small number of places (whereas I love interfaces).
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How do I create my own URL protocol? (e.g. so://…) [closed]
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The portion with the HTTP://,FTP://, etc are called URI Schemes
You can register your own through the registry.
HKEY_CLASSES_ROOT/
your-protocol-name/
(Default) "URL:your-protocol-name Protocol"
URL Protocol ""
shell/
open/
command/
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Python error “ImportError: No module named”
...ut a .bin extension to indicate binary data."
The missing __init__.py (now called __init__.py.bin) means python doesn't understand toolkit as a package.
You create __init__.py in the appropriate directory and everything works... ?
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Using Pylint with Django
...ugins=pylint_django to linters/pylint/args setting. Note the '=' sign, it didn't work without it.
– Dennis Golomazov
Nov 19 '15 at 13:32
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