大约有 41,000 项符合查询结果（耗时：0.0301秒） [XML]
How to parse a string into a nullable int
...this in one line, using the conditional operator and the fact that you can cast null to a nullable type (two lines, if you don't have a pre-existing int you can reuse for the output of TryParse):
Pre C#7:
int tempVal;
int? val = Int32.TryParse(stringVal, out tempVal) ? Int32.Parse(stringVal) : (in...
How to format a string as a telephone number in C#
... If I'm dealing with a string already, as the poster has said, casting it to a long and back again seems silly.
– Ryan Duffield
Oct 9 '08 at 18:39
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How do I overload the square-bracket operator in C#?
... I'd like to add that you can override both implicit and explicit type-casting in C# now.
– Felype
Sep 15 '17 at 13:53
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Good tutorial for using HTML5 History API (Pushstate?) [closed]
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Here is a great screen-cast on the topic by Ryan Bates of railscasts. At the end he simply disables the ajax functionality if the history.pushState method is not available:
http://railscasts.com/episodes/246-ajax-history-state
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python exception message capturing
... @HeribertoJuárez Why catch special cases while you can simply cast it to string?
– HosseyNJF
Apr 19 at 18:13
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How can I check for an empty/undefined/null string in JavaScript?
...e !!(not not) operator.
if(!!str){
// Some code here
}
Or use type casting:
if(Boolean(str)){
// Code here
}
Both do the same function. Typecast the variable to Boolean, where str is a variable.
It returns false for null,undefined,0,000,"",false.
It returns true for string "0" and whi...
Is there a better way of writing v = (v == 0 ? 1 : 0); [closed]
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v = !v;
or if they must be numbers:
v = +!v; /* Boolean invert v then cast back to a Number */
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Can two Java methods have same name with different return types? [duplicate]
...have to do to create an array of generics, or the use of double and triple casts, or the fact that even java.util.ArrayList doesn't compile without warnings (got to be the most basic of use cases)
– Peter Lawrey
Apr 6 '11 at 7:52
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DateTime format to SQL format using C#
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Yeah, on the official page CAST and CONVERT (Transact-SQL), they use the name "ODBC canonical" for the form with a space separating yyyy-MM-dd from the time of day, and the name "ISO8601" for the form where the separating character is a T. But yes, bot...
LINQ to Entities does not recognize the method 'System.String ToString()' method, and this method ca
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Cast table to Enumerable, then you call LINQ methods with using ToString() method inside:
var example = contex.table_name.AsEnumerable()
.Select(x => new {Date = x.date.ToString("M/d/yyyy")...)
But be careful, when ...