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Random row from Linq to Sql
... cust = (from row in ctx.Customers
where row.IsActive // your filter
orderby ctx.Random()
select row).FirstOrDefault();
Note that this is only suitable for small-to-mid-size tables; for huge tables, it will have a performance impact at the server, and it will be mo...
How do you create optional arguments in php?
...
The default value of the argument must be a constant expression. It can't be a variable or a function call.
If you need this functionality however:
function foo($foo, $bar = false)
{
if(!$bar)
{
$bar = $foo;
}
}...
Disable Required validation attribute under certain circumstances
...ed in their corresponding controller actions:
[HttpPost]
public ActionResult Update(UpdateViewView model)
{
...
}
[HttpPost]
public ActionResult Insert(InsertViewModel model)
{
...
}
share
|
...
How to bind function arguments without binding this?
...ction?
What you do is create a function that has the desired arguments built into it via closures:
var withWrappedArguments = function(arg1, arg2)
{
return function() { ... do your stuff with arg1 and arg2 ... };
}(actualArg1Value, actualArg2Value);
Hope I got the syntax right th...
When to throw an exception?
...xamine an arbitrary class and return true if that class inherits from List<>. This function asks the question, "Is this object a descendant of List?" This function should never throw an exception, because there are no gray areas in its operation - every single class either does or does not inh...
Is it possible to use jQuery .on and hover?
I have a <ul> that is populated with javascript after the initial page load. I'm currently using .bind with mouseover and mouseout .
...
Draw multi-line text to Canvas
...ick question, but I can't seem to find any examples... I'd like to write multi-line text to a custom View via a Canvas , and in onDraw() I have:
...
Convert a list of objects to an array of one of the object's properties
... List<String> somestringlist = myobjectlist.Select(x => x.id).ToList();
– Marty_in_a_Box
May 11 '16 at 15:24
...
Java how to replace 2 or more spaces with single space in string and delete leading and trailing spa
... test.replaceAll("^ +| +$|( )+", "$1")
);
}
There are 3 alternates:
^_+ : any sequence of spaces at the beginning of the string
Match and replace with $1, which captures the empty string
_+$ : any sequence of spaces at the end of the string
Match and replace with $1, which c...
TypeScript: Creating an empty typed container array
...re the type
var arr: Criminal[] = [];
// 2. Via type assertion
var arr = <Criminal[]>[];
var arr = [] as Criminal[];
// 3. Using the Array constructor
var arr = new Array<Criminal>();
Explicitly specifying the type is the general solution for whenever type inference fails for a vari...