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How do I add a placeholder on a CharField in Django?
...o solutions) you have the option to specify a custom widget for a field by setting the widgets attribute of the inner Meta class.
class CommentForm(forms.ModelForm):
class Meta:
model = Comment
widgets = {
'body': forms.Textarea(attrs={'cols': 80, 'rows': 20})
...
Struggling with NSNumberFormatter in Swift for currency
...to my program, so that bit is sorted. Now I just need to figure out how to set the text field placeholders based on the users location.
– user3746428
Jul 25 '14 at 17:43
2
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Get top n records for each group of grouped results
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It's not a problem if it's desired. You can set the order of a.person.
– Alberto Leal
Sep 21 '17 at 18:18
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How many files can I put in a directory?
Does it matter how many files I keep in a single directory? If so, how many files in a directory is too many, and what are the impacts of having too many files? (This is on a Linux server.)
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error: passing xxx as 'this' argument of xxx discards qualifiers
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The objects in the std::set are stored as const StudentT. So when you try to call getId() with the const object the compiler detects a problem, mainly you're calling a non-const member function on const object which is not allowed because non-const...
What does tree-ish mean in Git?
...)directory tree can also be
used to point to a commit. In other words, the set of "commit-ish" identifiers
is a strict subset of the set of "tree-ish" identifiers.
As explained in the documentation (thanks to Trebor for helping
me find it):
<tree>
Indicates a tree object name.
<co...
What is the difference between char s[] and char *s?
...
The difference here is that
char *s = "Hello world";
will place "Hello world" in the read-only parts of the memory, and making s a pointer to that makes any writing operation on this memory illegal.
While doing:
char s[] = "...
Catch a thread's exception in the caller thread in Python
...vement I'd suggest is using six.raise_from() so that you get a nice nested set of stack traces, instead of just the stack for the site of the reraise.
– aggieNick02
Oct 7 '19 at 19:35
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UIImage: Resize, then Crop
...de - it's part of a categeory on UIImage. Target size in my code is always set to the full screen size of the device.
@implementation UIImage (Extras)
#pragma mark -
#pragma mark Scale and crop image
- (UIImage*)imageByScalingAndCroppingForSize:(CGSize)targetSize
{
UIImage *sourceImage = self...