大约有 16,000 项符合查询结果（耗时：0.0322秒） [XML]
New Array from Index Range Swift
...you have to cast your Slice to an array:
func aFunction(numbers: Array<Int>, position: Int) -> Array<Int> {
var newNumbers = Array(numbers[0..<position])
return newNumbers
}
// test
aFunction([1, 2, 3], 2) // returns [1, 2]
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Python JSON serialize a Decimal object
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Hmm, for me this converts Decimal objects to floats, which is not acceptable. Loss of precision when working with currency, for instance.
– Matthew Schinckel
Oct 22 '10 at 0:12
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How do I overload the square-bracket operator in C#?
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you can find how to do it here.
In short it is:
public object this[int i]
{
get { return InnerList[i]; }
set { InnerList[i] = value; }
}
If you only need a getter the syntax in answer below can be used as well (starting from C# 6).
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How to check if two arrays are equal with JavaScript? [duplicate]
... works in almost all cases, except that null!==undefined but they both are converted to JSON representation null and considered equal:
function arraysEqual(a1,a2) {
/* WARNING: arrays must not contain {objects} or behavior may be undefined */
return JSON.stringify(a1)==JSON.stringify(a2);
}...
What is a NullReferenceException, and how do I fix it?
... different meanings:
Object variables which are uninitialized and hence point to nothing. In this case, if you access properties or methods of such objects, it causes a NullReferenceException.
The developer is using null intentionally to indicate there is no meaningful value available. Note that C#...
Consistency of hashCode() on a Java string
... a Java application, the hashCode method must consistently return the same integer, provided no information used in equals comparisons on the object is modified. This integer need not remain consistent from one execution of an application to another execution of the same application.
EDIT
Since...
When to use IList and when to use List
I know that IList is the interface and List is the concrete type but I still don't know when to use each one. What I'm doing now is if I don't need the Sort or FindAll methods I use the interface. Am I right? Is there a better way to decide when to use the interface or the concrete type?
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How do C++ class members get initialized if I don't do it explicitly?
...pile error if you do not explicitly initialize it.
For primitive types (pointers, ints, etc), they are not initialized -- they contain whatever arbitrary junk happened to be at that memory location previously.
For references (e.g. std::string&), it is illegal not to initialize them, and your c...
Closure in Java 7 [closed]
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Here is Neal Gafter's blog one of the pioneers introducing closures in Java. His post on closures from January 28, 2007 is named A Definition of Closures On his blog there is lots of information to get you started as well as videos. An here is an excellent Google talk - A...
Is there a method that calculates a factorial in Java?
... for this one to reuse?
I could use such a method with standard types (Eg. int, long...) and with BigInteger / BigDecimal, too.
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