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Run a callback only if an attribute has changed in Rails
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Before Saving (OPTIONAL CHANGE)
After modifying an object and before saving to the database, or within the before_save filter:
changes should now be changes_to_save
changed? should now be has_changes_to_save?
changed should now be changed_attribute_names_to_save
<attribute>_...
What is the purpose of fork()?
In many programs and man pages of Linux, I have seen code using fork() . Why do we need to use fork() and what is its purpose?
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How can I specify working directory for popen
Is there a way to specify the running directory of command in Python's subprocess.Popen() ?
1 Answer
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Changing case in Vim
Is there a command in Vim that changes the case of the selected text?
2 Answers
2
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Why is there a difference in checking null against a value in VB.NET and C#?
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VB.NET and C#.NET are different languages, built by different teams who have made different assumptions about usage; in this case the semantics of a NULL comparison.
My personal preference is for the VB.NET semantics, which in esse...
What is the easiest way to initialize a std::vector with hardcoded elements?
I can create an array and initialize it like this:
29 Answers
29
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How to make Sequelize use singular table names
...de to freezeTableName is that it also prevents sqlz from lowercasing table and column names. Which means that later, when you're hand-writing SQL to dig through data, you have to cope with mixed-case names (whatever that means for your dialect). On pg, it means having to use double-quotes around eve...
No provider for “framework:jasmine”! (Resolving: framework:jasmine)
When I run the command grunt I get the following warning:
6 Answers
6
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Download a file with Android, and showing the progress in a ProgressDialog
...t gets updated. For this I need a simple function that can download a file and show the current progress in a ProgressDialog . I know how to do the ProgressDialog , but I'm not sure how to display the current progress and how to download the file in the first place.
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Get record counts for all tables in MySQL database
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Is there any other way to get table_row and table_name ? Because i want exact result not rough estimate. Thank you.
– krunal shah
Apr 1 '11 at 3:35
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