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Create an array with same element repeated multiple times
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It's much more efficient to allocate all of the entries up front, with arr = new Array(len);, then assign to them by index in the loop, i.e. arr[i] = value;. That way you only pay O(n) rather than having to keep reallocating the array...
Working copy XXX locked and cleanup failed in SVN
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How to manage client-side JavaScript dependencies? [closed]
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How to use index in select statement?
...ex in query. It is used (or not) automagically. You can force it, however. More details (when and why do this) in other posts below.
– Rast
Apr 28 '14 at 11:05
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In Django, how do I check if a user is in a certain group?
...hen user.groups.all() returns [<Group: Editor>].
Alternatively, and more directly, you can check if a a user is in a group by:
if django_user.groups.filter(name = groupname).exists():
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Note that groupname can also be the actual Django Group object.
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Use 'import module' or 'from module import'?
... typing mo.foo)
from module import foo
Pros:
Less typing to use foo
More control over which items of a module can be accessed
Cons:
To use a new item from the module you have to update your import statement
You lose context about foo. For example, it's less clear what ceil() does compared ...
Best way to get identity of inserted row?
...ted via that statement. Since it's scoped to the specific statement, it's more straightforward than the other functions above. However, it's a little more verbose (you'll need to insert into a table variable/temp table and then query that) and it gives results even in an error scenario where the s...
Is there a way to break a list into columns?
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Why is a C++ Vector called a Vector?
... typically considered 2-3 dimensional because of their use in physics. But more generally in mathematics, they just mean a set of numbers that has an order (mathematical sets are orderless, they're like a bag filled with stuff). A vector can have any number of elements.
– Josep...
Why doesn't Java support unsigned ints?
...gree with Gosling here with a specific example (from CLR no less). What's more confusing giving an Array a signed integer length value or an unsigned length? It's impossible for an Array to have negative length yet our API indicates that's possible.
– JaredPar
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