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When saving, how can you check if a field has changed?
... if you make changes to the object, save it, then makes additional changes and call save() on it AGAIN, it will still work correctly.
– philfreo
Mar 14 '12 at 22:57
17
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Go to back directory browsing after opening file in vim
...ory browsing in vim, I can open a file by moving the cursor to a file name and pressing Enter .
7 Answers
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Get last result in interactive Python shell
...
Just for the record, ipython takes this one step further and you can access every result with _ and its numeric value
In [1]: 10
Out[1]: 10
In [2]: 32
Out[2]: 32
In [3]: _
Out[3]: 32
In [4]: _1
Out[4]: 10
In [5]: _2
Out[5]: 32
In [6]: _1 + _2
Out[6]: 42
In [7]: _6
Out[7]: 42...
Difference between require, include, require_once and include_once?
...
There are require and include_once as well.
So your question should be...
When should I use require vs. include?
When should I use require_once vs. require
The answer to 1 is described here.
The require() function is identical to inc...
What is a stack trace, and how can I use it to debug my application errors?
...ject.Book.getTitle(Book.java:16)
To debug this, we can open up Book.java and look at line 16, which is:
15 public String getTitle() {
16 System.out.println(title.toString());
17 return title;
18 }
This would indicate that something (probably title) is null in the above code.
Exam...
Is there a difference between “raise exception()” and “raise exception” without parenthesis?
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The short answer is that both raise MyException and raise MyException() do the same thing. This first form auto instantiates your exception.
The relevant section from the docs says, "raise evaluates the first expression as the exception object. It must be either a subcla...
Python list iterator behavior and next(iterator)
...dering about it while solving some real problem.
– brandizzi
May 29 '13 at 13:26
5
... *dies*. Th...
Case insensitive string as HashMap key
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This is the simplest by far, and also preserves the case of the keys when iterating through them.
– Ralf
Aug 11 '14 at 8:31
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Why is parenthesis in print voluntary in Python 2.7?
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In Python 2.x print is actually a special statement and not a function*.
This is also why it can't be used like: lambda x: print x
Note that (expr) does not create a Tuple (it results in expr), but , does. This likely results in the confusion between print (x) and print (x, ...
How to change the text on the action bar
Currently it just displays the name of the application and I want it to display something custom and be different for each screen in my app.
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