1 次元 Array 内または Array 内で値が最初に見つかった位置のインデックス番号を返します。
オーバーロードの一覧
指定したオブジェクトを検索し、1 次元の Array 全体でそのオブジェクトが最初に見つかった位置のインデックス番号を返します。
[Visual Basic] Overloads Public Shared Function IndexOf(Array, Object) As Integer
[JScript] public static function IndexOf(Array, Object) : int;
指定したオブジェクトを検索し、指定したインデックスから最後の要素までの 1 次元 Array の範囲内でそのオブジェクトが最初に見つかった位置のインデックス番号を返します。
[Visual Basic] Overloads Public Shared Function IndexOf(Array, Object, Integer) As Integer
[JScript] public static function IndexOf(Array, Object, int) : int;
指定したオブジェクトを検索し、指定したインデックスから開始する、指定した要素数を含む 1 次元 Array の範囲内でそのオブジェクトが最初に見つかった位置のインデックス番号を返します。
.NET Compact Framework でもサポート。
[Visual Basic] Overloads Public Shared Function IndexOf(Array, Object, Integer, Integer) As Integer
[C++] public: static int IndexOf(Array*, Object*, int, int);
[JScript] public static function IndexOf(Array, Object, int, int) : int;
使用例
最初に見つかった指定要素のインデックスを確認する方法を次のコード例で示します。
Imports System
Imports Microsoft.VisualBasic
Public Class SamplesArray
Public Shared Sub Main()
' Creates and initializes a new Array with three elements of
' the same value.
Dim myArray As Array = Array.CreateInstance(GetType(String), 12)
myArray.SetValue("the", 0)
myArray.SetValue("quick", 1)
myArray.SetValue("brown", 2)
myArray.SetValue("fox", 3)
myArray.SetValue("jumps", 4)
myArray.SetValue("over", 5)
myArray.SetValue("the", 6)
myArray.SetValue("lazy", 7)
myArray.SetValue("dog", 8)
myArray.SetValue("in", 9)
myArray.SetValue("the", 10)
myArray.SetValue("barn", 11)
' Displays the values of the Array.
Console.WriteLine("The Array contains the following values:")
PrintIndexAndValues(myArray)
' Searches for the first occurrence of the duplicated value.
Dim myString As String = "the"
Dim myIndex As Integer = Array.IndexOf(myArray, myString)
Console.WriteLine("The first occurrence of ""{0}"" is at index {1}.", _
myString, myIndex)
' Searches for the first occurrence of the duplicated value in the last
' section of the Array.
myIndex = Array.IndexOf(myArray, myString, 4)
Console.WriteLine("The first occurrence of ""{0}"" between index 4 " _
+ "and the end is at index {1}.", myString, myIndex)
' Searches for the first occurrence of the duplicated value in a section
' of the Array.
myIndex = Array.IndexOf(myArray, myString, 6, 5)
Console.WriteLine("The first occurrence of ""{0}"" between index 6 " _
+ "and index 10 is at index {1}.", myString, myIndex)
End Sub
Public Shared Sub PrintIndexAndValues(myArray As Array)
Dim i As Integer
For i = myArray.GetLowerBound(0) To myArray.GetUpperBound(0)
Console.WriteLine(ControlChars.Tab + "[{0}]:" + ControlChars.Tab _
+ "{1}", i, myArray.GetValue(i))
Next i
End Sub
End Class
' This code produces the following output.
'
' The Array contains the following values:
' [0]: the
' [1]: quick
' [2]: brown
' [3]: fox
' [4]: jumps
' [5]: over
' [6]: the
' [7]: lazy
' [8]: dog
' [9]: in
' [10]: the
' [11]: barn
' The first occurrence of "the" is at index 0.
' The first occurrence of "the" between index 4 and the end is at index 6.
' The first occurrence of "the" between index 6 and index 10 is at index 6.
[C#]
using System;
public class SamplesArray {
public static void Main() {
// Creates and initializes a new Array with three elements of the same value.
Array myArray=Array.CreateInstance( typeof(String), 12 );
myArray.SetValue( "the", 0 );
myArray.SetValue( "quick", 1 );
myArray.SetValue( "brown", 2 );
myArray.SetValue( "fox", 3 );
myArray.SetValue( "jumps", 4 );
myArray.SetValue( "over", 5 );
myArray.SetValue( "the", 6 );
myArray.SetValue( "lazy", 7 );
myArray.SetValue( "dog", 8 );
myArray.SetValue( "in", 9 );
myArray.SetValue( "the", 10 );
myArray.SetValue( "barn", 11 );
// Displays the values of the Array.
Console.WriteLine( "The Array contains the following values:" );
PrintIndexAndValues( myArray );
// Searches for the first occurrence of the duplicated value.
String myString = "the";
int myIndex = Array.IndexOf( myArray, myString );
Console.WriteLine( "The first occurrence of \"{0}\" is at index {1}.", myString, myIndex );
// Searches for the first occurrence of the duplicated value in the last section of the Array.
myIndex = Array.IndexOf( myArray, myString, 4 );
Console.WriteLine( "The first occurrence of \"{0}\" between index 4 and the end is at index {1}.", myString, myIndex );
// Searches for the first occurrence of the duplicated value in a section of the Array.
myIndex = Array.IndexOf( myArray, myString, 6, 5 );
Console.WriteLine( "The first occurrence of \"{0}\" between index 6 and index 10 is at index {1}.", myString, myIndex );
}
public static void PrintIndexAndValues( Array myArray ) {
for ( int i = myArray.GetLowerBound(0); i <= myArray.GetUpperBound(0); i++ )
Console.WriteLine( "\t[{0}]:\t{1}", i, myArray.GetValue( i ) );
}
}
/*
This code produces the following output.
The Array contains the following values:
[0]: the
[1]: quick
[2]: brown
[3]: fox
[4]: jumps
[5]: over
[6]: the
[7]: lazy
[8]: dog
[9]: in
[10]: the
[11]: barn
The first occurrence of "the" is at index 0.
The first occurrence of "the" between index 4 and the end is at index 6.
The first occurrence of "the" between index 6 and index 10 is at index 6.
*/
[C++]
#using <mscorlib.dll>
using namespace System;
void PrintIndexAndValues( Array* myArray );
void main() {
// Creates and initializes a new Array instance with three elements of the same value.
Array* myArray = Array::CreateInstance( __typeof(String), 12 );
myArray->SetValue( S"the", 0 );
myArray->SetValue( S"quick", 1 );
myArray->SetValue( S"brown", 2 );
myArray->SetValue( S"fox", 3 );
myArray->SetValue( S"jumped", 4 );
myArray->SetValue( S"over", 5 );
myArray->SetValue( S"the", 6 );
myArray->SetValue( S"lazy", 7 );
myArray->SetValue( S"dog", 8 );
myArray->SetValue( S"in", 9 );
myArray->SetValue( S"the", 10 );
myArray->SetValue( S"barn", 11 );
// Displays the values of the Array.
Console::WriteLine( "The Array instance contains the following values:" );
PrintIndexAndValues( myArray );
// Searches for the first occurrence of the duplicated value.
String* myString = "the";
int myIndex = Array::IndexOf( myArray, myString );
Console::WriteLine( "The first occurrence of \"{0}\" is at index {1}.", myString, __box(myIndex) );
// Searches for the first occurrence of the duplicated value in the last section of the Array.
myIndex = Array::IndexOf( myArray, myString, 4 );
Console::WriteLine( "The first occurrence of \"{0}\" between index 4 and the end is at index {1}.", myString, __box(myIndex));
// Searches for the first occurrence of the duplicated value in a section of the Array.
myIndex = Array::IndexOf( myArray, myString, 6, 5 );
Console::WriteLine( "The first occurrence of \"{0}\" between index 6 and index 10 is at index {1}.", myString, __box(myIndex));
}
void PrintIndexAndValues( Array* myArray ) {
for ( int i = myArray->GetLowerBound(0); i <= myArray->GetUpperBound(0); i++ )
Console::WriteLine( "\t[{0}]:\t{1}", __box(i), myArray->GetValue( i ) );
}
/*
This code produces the following output.
The Array instance contains the following values:
[0]: the
[1]: quick
[2]: brown
[3]: fox
[4]: jumped
[5]: over
[6]: the
[7]: lazy
[8]: dog
[9]: in
[10]: the
[11]: barn
The first occurrence of "the" is at index 0.
The first occurrence of "the" between index 4 and the end is at index 6.
The first occurrence of "the" between index 6 and index 10 is at index 6.
*/
[JScript]
import System;
// Creates and initializes a new Array with three elements of the same value.
var myArray : System.Array = System.Array.CreateInstance( System.String, 12 );
myArray.SetValue( "the", 0 );
myArray.SetValue( "quick", 1 );
myArray.SetValue( "brown", 2 );
myArray.SetValue( "fox", 3 );
myArray.SetValue( "jumped", 4 );
myArray.SetValue( "over", 5 );
myArray.SetValue( "the", 6 );
myArray.SetValue( "lazy", 7 );
myArray.SetValue( "dog", 8 );
myArray.SetValue( "in", 9 );
myArray.SetValue( "the", 10 );
myArray.SetValue( "barn", 11 );
// Displays the values of the Array.
Console.WriteLine( "The Array contains the following values:" );
PrintIndexAndValues( myArray );
// Searches for the first occurrence of the duplicated value.
var myString : String = "the";
var myIndex : int = System.Array.IndexOf( myArray, myString );
Console.WriteLine( "The first occurrence of \"{0}\" is at index {1}.", myString, myIndex );
// Searches for the first occurrence of the duplicated value in the last section of the Array.
myIndex = System.Array.IndexOf( myArray, myString, 4 );
Console.WriteLine( "The first occurrence of \"{0}\" between index 4 and the end is at index {1}.", myString, myIndex );
// Searches for the first occurrence of the duplicated value in a section of the Array.
myIndex = System.Array.IndexOf( myArray, myString, 6, 5 );
Console.WriteLine( "The first occurrence of \"{0}\" between index 6 and index 10 is at index {1}.", myString, myIndex );
function PrintIndexAndValues( myArray : System.Array ) {
for ( var i : int = myArray.GetLowerBound(0); i <= myArray.GetUpperBound(0); i++ )
Console.WriteLine( "\t[{0}]:\t{1}", i, myArray.GetValue( i ) );
}
/*
This code produces the following output.
The Array contains the following values:
[0]: the
[1]: quick
[2]: brown
[3]: fox
[4]: jumped
[5]: over
[6]: the
[7]: lazy
[8]: dog
[9]: in
[10]: the
[11]: barn
The first occurrence of "the" is at index 0.
The first occurrence of "the" between index 4 and the end is at index 6.
The first occurrence of "the" between index 6 and index 10 is at index 6.
*/