C# 0 The Complete Reference

a

, T 

v

,

                                         int 

star t

)

Returns the index of the first element within the one-dimensional array 

a

 that 

has the value specified by 

v.

 The search begins at 

a

[

star t

]. Returns –1 if the 

value is not found. 

public static int IndexOf(Array 

a

, object 

v

,

                                   int 

star t

, int 

count

)

Returns the index of the first element within the one-dimensional array 

a

 that 

has the value specified by 

v.

 The search begins at 

a

[

star t

] and runs for 

count

elements. Returns –1 if the value is not found within the specified range. (If 

the array has a lower bound other than 0, then the failure value is the lower 

bound –1.)

public static int IndexOf(T[ ] 

a

, T 

v

,

                                         int 

star t

, int 

count

)

Returns the index of the first element within the one-dimensional array 

a

 that 

has the value specified by 

v.

 The search begins at 

a

[

star t

] and runs for 

count

elements. Returns –1 if the value is not found within the specified range. 

public void Initialize( )

Initializes each element in the invoking array by calling the element’s default 

constructor. This method can be used only on arrays of value types that have 

constructors.

public static int LastIndexOf(Array 

a

, object 

v

)

Returns the index of the last element within the one-dimensional array 

a

 that 

has the value specified by 

v.

 Returns –1 if the value is not found. (If the array 

has a lower bound other than 0, then the failure value is the lower bound –1.)

public static int LastIndexOf(T[ ] 

a

, T 

v

)

Returns the index of the last element within the one-dimensional array 

a

 that 

has the value specified by 

v.

 Returns –1 if the value is not found. 

public static int LastIndexOf(Array 

a

, object 

v

,

                                         int 

star t

)

Returns the index of the last element within a range of the one-dimensional 

array 

a

 that has the value specified by 

v.

 The search proceeds in reverse 

order, beginning at 

a

[

star t

] and stopping at 

a

[0]. Returns –1 if the value is 

not found. (If the array has a lower bound other than 0, then the failure value 

is the lower bound –1.)

T

ABLE

 21-12 

Methods Defi ned by 

Array

(continued)

Method

Meaning

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public static int LastIndexOf(T[ ]