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Rails create or update magic?
... if it doesn't exist.
def self.find_by_or_create_with(args, attributes) # READ CAREFULLY! args for finding, attributes for creating!
obj = self.find_or_initialize_by(args)
return obj if obj.persisted?
return obj if obj.update_attributes(attributes)
end
...
Automatic vertical scroll bar in WPF TextBlock?
...k />
</ScrollViewer>
NOTE this answer applies to a TextBlock (a read-only text element) as asked for in the original question.
If you want to show scroll bars in a TextBox (an editable text element) then use the ScrollViewer attached properties:
<TextBox ScrollViewer.HorizontalScroll...
Android equivalent of NSUserDefaults in iOS
...= preferences.edit();
editor.putInt("var1", myvar);
editor.commit();
//--READ data
myvar = preferences.getInt("var1", 0);
Where 'context' is the current context (e.g. in an activity subclass could be this).
shar...
How do I import global modules in Node? I get “Error: Cannot find module ”?
... use npm link <global-package> to create a local link to a package already installed globally. (Caveat: The OS must support symlinks.)
However, this doesn't come without its problems.
npm link is a development tool. It's awesome for managing packages on your local development box. But d...
Remove empty space before cells in UITableView
...
Had same issue. Removing it and readding worked for me also.
– sma
May 22 '14 at 19:34
3
...
Just disable scroll not hide it?
... page will stand in its place, no matter if you're on top or if you have already scrolled.
Css
.noscroll { position: fixed; overflow-y:scroll }
JS
$('body').css('top', -(document.documentElement.scrollTop) + 'px')
.addClass('noscroll');
...
Logical operators for boolean indexing in Pandas
...A B C
1 3 7 9
2 3 5 2
3 4 7 6
If you haven't yet, please also read the section on Logical AND above, all caveats apply here.
Alternatively, this operation can be specified with
df[df['A'].eq(3) | df['B'].eq(7)]
A B C
1 3 7 9
2 3 5 2
3 4 7 6
operator.or_
Calls Series....
Why does Java switch on contiguous ints appear to run faster with added cases?
...
@Aniket: Read this article of wikipedia. en.wikipedia.org/wiki/Branch_table
– Vishal K
Mar 25 '13 at 17:39
14
...
Why do my list item bullets overlap floating elements
...
Nice! I can't see how this makes any sense, though, when reading the W3C doc on overflow: w3schools.com/cssref/pr_pos_overflow.asp
– MSC
Jun 19 '15 at 4:41
...
Django: Get an object form the DB, or 'None' if nothing matches
...
@TomaszGandor: Yeah, it is clumsy and difficult to read, whatever your favorite language tutorial says. When I see an exception I suppose that something non-standard is happening. Readability counts. But I agree when there's no other reasonable option, you should go for it an...