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Rails: how do I validate that something is a boolean?
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So, this gets the validation right, but the error message is not helpful for the end user: "myfield is not included in the list"
– Peter Sankauskas
Mar 28 '13 at 5:12
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iOS 7 style Blur view
...ice = [AVCaptureDevice defaultDeviceWithMediaType:AVMediaTypeVideo];
NSError *error;
AVCaptureDeviceInput *deviceInput = [AVCaptureDeviceInput deviceInputWithDevice:inputDevice error:&error];
if ([session canAddInput:deviceInput]) {
[session addInput:deviceInput];
}
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How to get Core Data object from specific Object ID?
...ectWithID:(NSManagedObjectID *)objectID
error:(NSError **)error
Fetches the object from the store that has that ID, or nil if it doesn't exist.
(Be aware: there are two methods on NSManagedObjectContext with similar-seeming names that tripped me up. To help keep...
Facebook Post Link Image
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I receieved this error from the lint tool. All the images referenced by og:image must be at least 200px in both dimensions. Please check all the images with tag og:image in the given url and ensure that it meets the minimum specification.. ...
Are there other whitespace codes like   for half-spaces, em-spaces, en-spaces etc useful in HTML
...rences)
– isNaN1247
Dec 15 '11 at 8:05
PS - I would still appreciate it if you mark this as the answer - if you do fee...
Unique BooleanField value in Django?
...he pre_save method on django.db.models.BooleanField. Instead of raising an error if another field was True, I made all other fields False if it was True. Also instead of raising an error if the field was False and no other field was True, I saved it the field as True
fields.py
from django.db.mode...
How to add multi line comments in makefiles
...ition in the ifeq evaluates as false, gmake will happily ignore the syntax errors inside the ifeq.
– Eric Melski
May 19 '15 at 20:51
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How to check if NSString begins with a certain character
...ple, the code below checks to see if a string begins with 10, which is the error code used to identify a certain problem.
NSString* myString = @"10:Username taken";
if([myString hasPrefix:@"10"]) {
//display more elegant error message
}
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mysql -> insert into tbl (select from another table) and some default values [duplicate]
...s city_name from test.cities as citydb; i am using this query it give me error can any one help me to solve this error?
– Chintan Mathukiya
Apr 7 at 12:57
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Cannot delete directory with Directory.Delete(path, true)
... directory a\b is open in Explorer, b will be deleted but you will get the error 'directory is not empty' for a even though it is empty when you go and look. The current directory of any application (including Explorer) retains a handle to the directory. When you call Directory.Delete(true), it dele...