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How to save/restore serializable object to/from file?
I have a list of objects and I need to save that somewhere in my computer. I have read some forums and I know that the object has to be Serializable . But it would be nice if I can get an example. For example if I have the following:
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Object of custom type as dictionary key
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You need to add 2 methods, note __hash__ and __eq__:
class MyThing:
def __init__(self,name,location,length):
self.name = name
self.location = location
self.length = length
def __hash__(self):
return hash((self.name, self.lo...
Efficiently checking if arbitrary object is NaN in Python / numpy / pandas?
...lues. As I iterate over the data set, I need to detect such missing values and handle them in special ways.
2 Answers
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How to implement a confirmation (yes/no) DialogPreference?
....setTitle("Title")
.setMessage("Do you really want to whatever?")
.setIcon(android.R.drawable.ic_dialog_alert)
.setPositiveButton(android.R.string.yes, new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int whichButton) {
Toast.makeText(MainActivity.this...
UITextView style is being reset after setting text property
I have UITextView *_masterText and after call method setText property font is being reset.
It's happening after I change sdk 7.
_masterText is IBOutlet , global and properties are set in storyboard. It's only me or this is general SDK bug?
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Imitate Facebook hide/show expanding/contracting Navigation Bar
...wing property:
@property (nonatomic) CGFloat previousScrollViewYOffset;
And here are the UIScrollViewDelegate methods:
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGRect frame = self.navigationController.navigationBar.frame;
CGFloat size = frame.size.height - 21;
CGFloat...
Fold / Collapse the except code section in sublime text 2
...on any of them will fold/collapse the code
If you want to collapse/expand all - you can do so by going to edit->code folding and choose "fold all" or "unfold all":
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Percentage Height HTML 5/CSS
...of the parent you've made yourself a little Catch 22. The browser gives up and just uses the content height.
So the parent of the div must have an explicit height property. Whilst that height can also be a percentage if you want, that just moves the problem up to the next level.
If you want to mak...
Most efficient T-SQL way to pad a varchar on the left to a certain length?
...right('XXXXXXXXXXXX'+ rtrim(@str), @n)
where X is your padding character and @n is the number of characters in the resulting string (assuming you need the padding because you are dealing with a fixed length).
But as I said you should really avoid doing this in your database.
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How to get city name from latitude and longitude coordinates in Google Maps?
How might I obtain the city name in Google Maps if I have latitude and longitude coordinates of a town or area?
15 Answers
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