大约有 16,000 项符合查询结果（耗时：0.0349秒） [XML]
LINQ - Left Join, Group By, and Count
...
from p in context.ParentTable
join c in context.ChildTable on p.ParentId equals c.ChildParentId into j1
from j2 in j1.DefaultIfEmpty()
group j2 by p.ParentId into grouped
select new { ParentId = grouped.Key, Count = grouped.Count(t=>t.ChildId != nu...
jQuery SVG, why can't I addClass?
I am using jQuery SVG. I can't add or remove a class to an object. Anyone know my mistake?
15 Answers
...
How do you specify a byte literal in Java?
...
You cannot. A basic numeric constant is considered an integer (or long if followed by a "L"), so you must explicitly downcast it to a byte to pass it as a parameter. As far as I know there is no shortcut.
...
How to generate a random string in Ruby
...'..'z').to_a[rand(26)] }.join
And a last one that's even more confusing, but more flexible and wastes fewer cycles:
o = [('a'..'z'), ('A'..'Z')].map(&:to_a).flatten
string = (0...50).map { o[rand(o.length)] }.join
sh...
Convert bytes to a string
...
You need to decode the bytes object to produce a string:
>>> b"abcde"
b'abcde'
# utf-8 is used here because it is a very common encoding, but you
# need to use the encoding your data is actually in.
>>> b"abcde".decode("utf-8") ...
Remove non-ascii character in string
...
ZaffyZaffy
14.1k88 gold badges4242 silver badges6969 bronze badges
8...
How to convert a string to an integer in JavaScript?
...
The simplest way would be to use the native Number function:
var x = Number("1000")
If that doesn't work for you, then there are the parseInt, unary plus, parseFloat with floor, and Math.round methods.
parseInt:
var x = parseInt("1000", 10); /...
Do I need to explicitly call the base virtual destructor?
...I am implementing the destructor again as virtual on the inheriting class, but do I need to call the base destructor?
7 Ans...
C library function to perform sort
Is there any library function available in C standard library to do sort?
7 Answers
7...
.NET / C# - Convert char[] to string
...
Joel CoehoornJoel Coehoorn
350k103103 gold badges521521 silver badges756756 bronze badges
...