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Generate 'n' unique random numbers within a range [duplicate]
...
You could use the random.sample function from the standard library to select k elements from a population:
import random
random.sample(range(low, high), n)
In case of a rather large range of possible numbers, you could use itertools.islice with an infinite random generator:
import itertools...
Why does the is operator return false when given null?
... conditions
are met:
expression is not null.
expression can be cast to type. That is, a cast expression of the
form (type (expression) will complete without throwing an exception.
For more information, see 7.6.6 Cast expressions.
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How can I convert String to Int?
...t for noobish people what 'out x' does is set the value of x to the string-cast-as-integer, if the casting is successful. I.e. in this case, x = 0 if the string has any non-integer characters, or x = value of string-as-integer otherwise. So the neat thing is this is one short expression which tells ...
printf format specifiers for uint32_t and size_t
...eded is that the format specifiers and the types agree, and you can always cast to make that true. long is at least 32bits, so %lu together with (unsigned long)k is always correct. size_t is trickier, which is why %zu was added in C99. If you can't use that, then treat it just like k (long is the bi...
What is the proper way to check for null values?
... @BlackBear but the value returned is most probably a string, so the cast is valid
– Firo
Mar 20 '12 at 14:29
Th...
ArrayList initialization equivalent to array initialization [duplicate]
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The selected answer is: ArrayList<Integer>(Arrays.asList(1,2,3,5,8,13,21));
However, its important to understand the selected answer internally copies the elements several times before creating the final array, and that th...
Reflection - get attribute name and value on property
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I was hoping that I won't have to cast the attribute.
– developerdoug
Jul 9 '11 at 22:14
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Create a list from two object lists with linq
...ite a lot to this:
list1.Concat(list2)
.ToLookup(p => p.Name)
.Select(g => g.Aggregate((p1, p2) => new Person
{
Name = p1.Name,
Value = p1.Value,
Change = p2.Value - p1.Value
}));
Although this won't error in the case where you have duplicate na...
SQL Data Reader - handling Null column values
...sqlreader[indexAge] as int? ?? default(int);
The as operator handles the casting including the check for DBNull.
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How to pass values between Fragments
... I tried step 5, That i'm calling listactivity from fragment and after selecting item from that activity, i want to come back in fragment with selected file name. But its not working, its giving me Nullpointer Exception at onCreateView. Any solution on this please? This is my question stackoverf...