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Determine what attributes were changed in Rails after_save callback?
...lback 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 follows:
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How to safely call an async method in C# without await
...WriteLine(t.Exception),
TaskContinuationOptions.OnlyOnFaulted);
This will allow you to deal with an exception on a thread other than the "main" thread. This means you don't have to "wait" for the call to MyAsyncMethod() from the thread that calls MyAsyncMethod; but, still allows you to do...
MySQL, update multiple tables with one query
...a function that updates three tables, but I use three queries to perform this. I wish to use a more convenient approach for good practice.
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Python SQL query string formatting
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my application I'd like to log to file all the sql query strings, and it is
important that the string is properly formated.
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Setting background-image using jQuery CSS property
...
You probably want this (to make it like a normal CSS background-image declaration):
$('myObject').css('background-image', 'url(' + imageUrl + ')');
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How to remove all characters after a specific character in python?
... have a string. How do I remove all text after a certain character? ( In this case ... )
The text after will ... change so I that's why I want to remove all characters after a certain one.
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Returning first x items from array
I want to return first 5 items from array. How can I do this?
5 Answers
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Useful code which uses reduce()? [closed]
...s anyone here have any useful code which uses reduce() function in python? Is there any code other than the usual + and * that we see in the examples?
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Inserting a Python datetime.datetime object into MySQL
...n in a MySQL table. I want to insert a datetime.datetime() object into this column. What should I be using in the execute statement?
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Using cURL with a username and password?
... also include the password in the command, but then your password will be visible in bash history:
curl -u username:password http://example.com
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