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Django filter queryset __in for *every* item in list
...d('Tag')
class Tag(models.Model):
name = models.CharField(max_length=50)
def __unicode__(self):
return self.name
In [2]: t1 = Tag.objects.create(name='holiday')
In [3]: t2 = Tag.objects.create(name='summer')
In [4]: p = Photo.objects.create()
In [5]: p.tags.add(t1)
In [6]: p.tags....
Pointers in C: when to use the ampersand and the asterisk?
... of integers
int i = *a; // the value of the first element of a
int i2 = a[0]; // another way to get the first element
To get the second element:
int a[2]; // array
int i = *(a + 1); // the value of the second element
int i2 = a[1]; // the value of the second element
So the [] indexing operator...
How to 'grep' a continuous stream?
...em with tail -f | grep, and --line-buffered solves it for me (on Ubuntu 14.04, GNU grep version 2.16). Where is the "use line buffering if stdout is a tty" logic implemented? In git.savannah.gnu.org/cgit/grep.git/tree/src/grep.c, line_buffered is set only by the argument parser.
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How do I use floating-point division in bash?
... am trying to divide two image widths in a Bash script, but bash gives me 0 as the result:
18 Answers
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Reasons for using the set.seed function
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270
The need is the possible desire for reproducible results, which may for example come from trying...
Convert integer into byte array (Java)
...ptional, the initial order of a byte buffer is always BIG_ENDIAN.
b.putInt(0xAABBCCDD);
byte[] result = b.array();
Setting the byte order ensures that result[0] == 0xAA, result[1] == 0xBB, result[2] == 0xCC and result[3] == 0xDD.
Or alternatively, you could do it manually:
byte[] toBytes(int i)...
Getting the index of the returned max or min item using max()/min() on a list
... |
edited Oct 27 '13 at 20:10
Gaurav Agarwal
16.5k2727 gold badges9696 silver badges152152 bronze badges
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How to run a single RSpec test?
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answered Feb 10 '19 at 12:08
emcemc
33022 silver badges55 bronze badges
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DbEntityValidationException - How can I easily tell what caused the error?
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+200
The easiest solution is to override SaveChanges on your entities class. You can catch the DbEntityValidationException, unwrap the act...
How to remove the arrow from a select element in Firefox
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30 Answers
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