time-to-botec/js/node_modules/@stdlib/array/int8/README.md

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# Int8Array

> [Typed array][mdn-typed-array] constructor which returns a [typed array][mdn-typed-array] representing an array of twos-complement 8-bit signed integers in the platform byte order.

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

</section>

<!-- /.intro -->

<!-- Package usage documentation. -->

<section class="usage">

## Usage

```javascript
var Int8Array = require( '@stdlib/array/int8' );
```

#### Int8Array()

A [typed array][mdn-typed-array] constructor which returns a [typed array][mdn-typed-array] representing an array of twos-complement 8-bit signed integers in the platform byte order.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array();
// returns <Int8Array>
```

#### Int8Array( length )

Returns a [typed array][mdn-typed-array] having a specified length.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 5 );
// returns <Int8Array>[ 0, 0, 0, 0, 0 ]
```

#### Int8Array( typedarray )

Creates a [typed array][mdn-typed-array] from another [typed array][mdn-typed-array].

<!-- eslint-disable stdlib/require-globals -->

```javascript
var Float32Array = require( '@stdlib/array/float32' );

var arr1 = new Float32Array( [ 5.0, 5.0, 5.0 ] );
var arr2 = new Int8Array( arr1 );
// returns <Int8Array>[ 5, 5, 5 ]
```

#### Int8Array( obj )

Creates a [typed array][mdn-typed-array] from an array-like `object` or iterable.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 5.0, 5.0, 5.0 ] );
// returns <Int8Array>[ 5, 5, 5 ]
```

#### Int8Array( buffer\[, byteOffset\[, length]] )

Returns a [typed array][mdn-typed-array] view of an [`ArrayBuffer`][@stdlib/array/buffer].

<!-- eslint-disable stdlib/require-globals -->

```javascript
var ArrayBuffer = require( '@stdlib/array/buffer' );

var buf = new ArrayBuffer( 4 );
var arr = new Int8Array( buf, 0, 4 );
// returns <Int8Array>[ 0, 0, 0, 0 ]
```

* * *

### Properties

<a name="static-prop-bytes-per-element"></a>

#### Int8Array.BYTES_PER_ELEMENT

Number of bytes per view element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var nbytes = Int8Array.BYTES_PER_ELEMENT;
// returns 1
```

<a name="static-prop-name"></a>

#### Int8Array.name

[Typed array][mdn-typed-array] constructor name.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var str = Int8Array.name;
// returns 'Int8Array'
```

<a name="prop-buffer"></a>

#### Int8Array.prototype.buffer

**Read-only** property which returns the [`ArrayBuffer`][@stdlib/array/buffer] referenced by the [typed array][mdn-typed-array].

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 5 );
var buf = arr.buffer;
// returns <ArrayBuffer>
```

<a name="prop-byte-length"></a>

#### Int8Array.prototype.byteLength

**Read-only** property which returns the length (in bytes) of the [typed array][mdn-typed-array].

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 5 );
var byteLength = arr.byteLength;
// returns 5
```

<a name="prop-byte-offset"></a>

#### Int8Array.prototype.byteOffset

**Read-only** property which returns the offset (in bytes) of the [typed array][mdn-typed-array] from the start of its [`ArrayBuffer`][@stdlib/array/buffer].

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 5 );
var byteOffset = arr.byteOffset;
// returns 0
```

<a name="prop-bytes-per-element"></a>

#### Int8Array.prototype.BYTES_PER_ELEMENT

Number of bytes per view element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 5 );
var nbytes = arr.BYTES_PER_ELEMENT;
// returns 1
```

<a name="prop-length"></a>

#### Int8Array.prototype.length

**Read-only** property which returns the number of view elements.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 5 );
var len = arr.length;
// returns 5
```

* * *

### Methods

<a name="static-method-from"></a>

#### Int8Array.from( src\[, map\[, thisArg]] )

Creates a new typed array from an array-like `object` or an iterable.

```javascript
var arr = Int8Array.from( [ 1, 2 ] );
// returns <Int8Array>[ 1, 2 ]
```

To invoke a function for each `src` value, provide a callback function.

```javascript
function mapFcn( v ) {
    return v * 2;
}

var arr = Int8Array.from( [ 1, 2 ], mapFcn );
// returns <Int8Array>[ 2, 4 ]
```

A callback function is provided two arguments:

-   `value`: source value
-   `index`: source index

To set the callback execution context, provide a `thisArg`.

```javascript
function mapFcn( v ) {
    this.count += 1;
    return v * 2;
}

var ctx = {
    'count': 0
};

var arr = Int8Array.from( [ 1, 2 ], mapFcn, ctx );
// returns <Int8Array>[ 2, 4 ]

var n = ctx.count;
// returns 2
```

<a name="static-method-of"></a>

#### Int8Array.of( element0\[, element1\[, ...elementN]] )

Creates a new typed array from a variable number of arguments.

```javascript
var arr = Int8Array.of( 1, 2 );
// returns <Int8Array>[ 1, 2 ]
```

<a name="method-copy-within"></a>

#### Int8Array.prototype.copyWithin( target, start\[, end] )

Copies a sequence of elements within an array starting at `start` and ending at `end` (non-inclusive) to the position starting at `target`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3, 4, 5 ] );

// Copy the last two elements to the first two elements:
arr.copyWithin( 0, 3 );

var v = arr[ 0 ];
// returns 4

v = arr[ 1 ];
// returns 5
```

By default, `end` equals the number of array elements (i.e., one more than the last array index). To limit the sequence length, provide an `end` argument.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3, 4, 5 ] );

// Copy the first two elements to the last two elements:
arr.copyWithin( 3, 0, 2 );

var v = arr[ 3 ];
// returns 1

v = arr[ 4 ];
// returns 2
```

When a `target`, `start`, and/or `end` index is negative, the respective index is determined relative to the last array element. The following example achieves the same behavior as the previous example:

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3, 4, 5 ] );

// Copy the first two elements to the last two elements:
arr.copyWithin( -2, -5, -3 );

var v = arr[ 3 ];
// returns 1

v = arr[ 4 ];
// returns 2
```

<a name="method-entries"></a>

#### Int8Array.prototype.entries()

Returns an iterator for iterating over array key-value pairs.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2 ] );

// Create an iterator:
var it = arr.entries();

// Iterate over key-value pairs...
var v = it.next().value;
// returns [ 0, 1 ]

v = it.next().value;
// returns [ 1, 2 ]

var bool = it.next().done;
// returns true
```

<a name="method-every"></a>

#### Int8Array.prototype.every( predicate\[, thisArg] )

Tests whether all array elements pass a test implemented by a `predicate` function.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v <= 1 );
}

var arr = new Int8Array( [ 1, 2 ] );

var bool = arr.every( predicate );
// returns false
```

A `predicate` function is provided three arguments:

-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    this.count += 1;
    return ( v >= 1 );
}

var ctx = {
    'count': 0
};

var arr = new Int8Array( [ 1, 2 ] );

var bool = arr.every( predicate, ctx );
// returns true

var n = ctx.count;
// returns 2
```

<a name="method-fill"></a>

#### Int8Array.prototype.fill( value\[, start\[, end]] )

Fills an array from a `start` index to an `end` index (non-inclusive) with a provided `value`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 2 );

// Set all array elements to the same value:
arr.fill( 2 );

var v = arr[ 0 ];
// returns 2

v = arr[ 1 ];
// returns 2

// Set all array elements starting from the first index to the same value:
arr.fill( 3, 1 );

v = arr[ 0 ];
// returns 2

v = arr[ 1 ];
// returns 3

// Set all array elements, except the last element, to the same value:
arr.fill( 4, 0, arr.length-1 );

v = arr[ 0 ];
// returns 4

v = arr[ 1 ];
// returns 3
```

When a `start` and/or `end` index is negative, the respective index is determined relative to the last array element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( 2 );

// Set all array elements, except the last element, to the same value:
arr.fill( 2, -arr.length, -1 );

var v = arr[ 0 ];
// returns 2

v = arr[ 1 ];
// returns 0
```

<a name="method-filter"></a>

#### Int8Array.prototype.filter( predicate\[, thisArg] )

Creates a new array (of the same data type as the host array) which includes those elements for which a `predicate` function returns a truthy value.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v >= 2 );
}

var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.filter( predicate );
// returns <Int8Array>[ 2, 3 ]
```

If a `predicate` function does not return a truthy value for any array element, the method returns an empty array.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v >= 10 );
}

var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.filter( predicate );
// returns <Int8Array>[]
```

A `predicate` function is provided three arguments:

-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    this.count += 1;
    return ( v >= 2 );
}

var ctx = {
    'count': 0
};

var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.filter( predicate, ctx );

var n = ctx.count;
// returns 3
```

<a name="method-find"></a>

#### Int8Array.prototype.find( predicate\[, thisArg] )

Returns the first array element for which a provided `predicate` function returns a truthy value.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v > 2 );
}

var arr = new Int8Array( [ 1, 2, 3 ] );

var v = arr.find( predicate );
// returns 3
```

If a `predicate` function does not return a truthy value for any array element, the method returns `undefined`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v < 1 );
}

var arr = new Int8Array( [ 1, 2, 3 ] );

var v = arr.find( predicate );
// returns undefined
```

A `predicate` function is provided three arguments:

-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    this.count += 1;
    return ( v > 2 );
}

var ctx = {
    'count': 0
};

var arr = new Int8Array( [ 1, 2, 3 ] );

var v = arr.find( predicate, ctx );
// returns 3

var n = ctx.count;
// returns 3
```

<a name="method-find-index"></a>

#### Int8Array.prototype.findIndex( predicate\[, thisArg] )

Returns the index of the first array element for which a provided `predicate` function returns a truthy value.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v >= 3 );
}

var arr = new Int8Array( [ 1, 2, 3 ] );

var idx = arr.findIndex( predicate );
// returns 2
```

If a `predicate` function does not return a truthy value for any array element, the method returns `-1`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v < 1 );
}

var arr = new Int8Array( [ 1, 2, 3 ] );

var idx = arr.findIndex( predicate );
// returns -1
```

A `predicate` function is provided three arguments:

-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    this.count += 1;
    return ( v >= 3 );
}

var ctx = {
    'count': 0
};

var arr = new Int8Array( [ 1, 2, 3 ] );

var idx = arr.findIndex( predicate, ctx );
// returns 2

var n = ctx.count;
// returns 3
```

<a name="method-for-each"></a>

#### Int8Array.prototype.forEach( fcn\[, thisArg] )

Invokes a callback for each array element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var str = '';

function fcn( v, i ) {
    str += i + ':' + v;
    if ( i < arr.length-1 ) {
        str += ' ';
    }
}

arr.forEach( fcn );

console.log( str );
// => '0:1 1:2 2:3'
```

The callback is provided three arguments:

-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function fcn() {
    this.count += 1;
}

var ctx = {
    'count': 0
};

var arr = new Int8Array( [ 1, 2, 3 ] );

arr.forEach( fcn, ctx );

var n = ctx.count;
// returns 3
```

<a name="method-includes"></a>

#### Int8Array.prototype.includes( searchElement\[, fromIndex] )

Returns a `boolean` indicating whether an array includes a search element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var bool = arr.includes( 3 );
// returns true

bool = arr.includes( 0 );
// returns false
```

By default, the method searches the entire array (`fromIndex = 0`). To begin searching from a specific array index, provide a `fromIndex`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var bool = arr.includes( 1, 1 );
// returns false
```

When a `fromIndex` is negative, the starting index is resolved relative to the last array element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

bool = arr.includes( 1, -2 );
// returns false
```

<a name="method-index-of"></a>

#### Int8Array.prototype.indexOf( searchElement\[, fromIndex] )

Returns the index of the first array element strictly equal to a search element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var idx = arr.indexOf( 3 );
// returns 2

idx = arr.indexOf( 0 );
// returns -1
```

By default, the method searches the entire array (`fromIndex = 0`). To begin searching from a specific array index, provide a `fromIndex`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var idx = arr.indexOf( 1, 1 );
// returns -1
```

When a `fromIndex` is negative, the starting index is resolved relative to the last array element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var idx = arr.indexOf( 1, -2 );
// returns -1
```

<a name="method-join"></a>

#### Int8Array.prototype.join( \[separator] )

Serializes an array by joining all array elements as a string.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var str = arr.join();
// returns '1,2,3'
```

By default, the method delineates array elements using a comma `,`. To specify a custom separator, provide a `separator` string.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var str = arr.join( '|' );
// returns '1|2|3'
```

<a name="method-keys"></a>

#### Int8Array.prototype.keys()

Returns an iterator for iterating over array keys.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2 ] );

// Create an iterator:
var it = arr.keys();

// Iterate over keys...
var v = it.next().value;
// returns 0

v = it.next().value;
// returns 1

var bool = it.next().done;
// returns true
```

<a name="method-last-index-of"></a>

#### Int8Array.prototype.lastIndexOf( searchElement\[, fromIndex] )

Returns the index of the last array element strictly equal to a search element, iterating from right to left.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 0, 2, 0, 1 ] );

var idx = arr.lastIndexOf( 0 );
// returns 3

idx = arr.lastIndexOf( 3 );
// returns -1
```

By default, the method searches the entire array (`fromIndex = -1`). To begin searching from a specific array index, provide a `fromIndex`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 0, 2, 0, 1 ] );

var idx = arr.lastIndexOf( 0, 2 );
// returns 1
```

When a `fromIndex` is negative, the starting index is resolved relative to the last array element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 0, 2, 0, 1 ] );

var idx = arr.lastIndexOf( 0, -3 );
// returns 1
```

<a name="method-map"></a>

#### Int8Array.prototype.map( fcn\[, thisArg] )

Maps each array element to an element in a new array having the same data type as the host array.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function fcn( v ) {
    return v * 2;
}

var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.map( fcn );
// returns <Int8Array>[ 2, 4, 6 ]
```

A callback is provided three arguments:

-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function fcn( v ) {
    this.count += 1;
    return v * 2;
}

var ctx = {
    'count': 0
};

var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.map( fcn, ctx );

var n = ctx.count;
// returns 3
```

<a name="method-reduce"></a>

#### Int8Array.prototype.reduce( fcn\[, initialValue] )

Applies a function against an accumulator and each element in an array and returns the accumulated result.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function fcn( acc, v ) {
    return acc + ( v*v );
}

var arr = new Int8Array( [ 2, 1, 3 ] );

var v = arr.reduce( fcn );
// returns 12
```

If not provided an initial value, the method invokes a provided function with the first array element as the first argument and the second array element as the second argument.

If provided an initial value, the method invokes a provided function with the initial value as the first argument and the first array element as the second argument.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function fcn( acc, v ) {
    return acc + ( v*v );
}

var arr = new Int8Array( [ 2, 1, 3 ] );

var v = arr.reduce( fcn, 0 );
// returns 14
```

A callback is provided four arguments:

-   `acc`: accumulated result
-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

<a name="method-reduce-right"></a>

#### Int8Array.prototype.reduceRight( fcn\[, initialValue] )

Applies a function against an accumulator and each element in an array and returns the accumulated result, iterating from right to left.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function fcn( acc, v ) {
    return acc + ( v*v );
}

var arr = new Int8Array( [ 2, 1, 3 ] );

var v = arr.reduceRight( fcn );
// returns 8
```

If not provided an initial value, the method invokes a provided function with the last array element as the first argument and the second-to-last array element as the second argument.

If provided an initial value, the method invokes a provided function with the initial value as the first argument and the last array element as the second argument.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function fcn( acc, v ) {
    return acc + ( v*v );
}

var arr = new Int8Array( [ 2, 1, 3 ] );

var v = arr.reduce( fcn, 0 );
// returns 14
```

A callback is provided four arguments:

-   `acc`: accumulated result
-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

<a name="method-reverse"></a>

#### Int8Array.prototype.reverse()

Reverses an array **in-place** (thus mutating the array on which the method is invoked).

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 2, 0, 3 ] );

// Reverse the array:
arr.reverse();

var v = arr[ 0 ];
// returns 3

v = arr[ 1 ];
// returns 0

v = arr[ 2 ];
// returns 2
```

<a name="method-set"></a>

#### Int8Array.prototype.set( arr\[, offset] )

Sets array elements.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );
// returns <Int8Array>[ 1, 2, 3 ]

// Set the first two array elements:
arr.set( [ 4, 5 ] );

var v = arr[ 0 ];
// returns 4

v = arr[ 1 ];
// returns 5
```

By default, the method starts writing values at the first array index. To specify an alternative index, provide an index `offset`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );
// returns <Int8Array>[ 1, 2, 3 ]

// Set the last two array elements:
arr.set( [ 4, 5 ], 1 );

var v = arr[ 1 ];
// returns 4

v = arr[ 2 ];
// returns 5
```

<a name="method-slice"></a>

#### Int8Array.prototype.slice( \[begin\[, end]] )

Copies array elements to a new array with the same underlying data type as the host array.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.slice();

var bool = ( arr1 === arr2 );
// returns false

bool = ( arr1.buffer === arr2.buffer );
// returns false

var v = arr2[ 0 ];
// returns 1

v = arr2[ 1 ];
// returns 2

v = arr2[ 2 ];
// returns 3
```

By default, the method copies elements beginning with the first array element. To specify an alternative array index at which to begin copying, provide a `begin` index (inclusive).

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.slice( 1 );

var len = arr2.length;
// returns 2

var v = arr2[ 0 ];
// returns 2

v = arr2[ 1 ];
// returns 3
```

By default, the method copies all array elements after `begin`. To specify an alternative array index at which to end copying, provide an `end` index (exclusive).

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.slice( 0, 2 );

var len = arr2.length;
// returns 2

var v = arr2[ 0 ];
// returns 1

v = arr2[ 1 ];
// returns 2
```

When a `begin` and/or `end` index is negative, the respective index is determined relative to the last array element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.slice( -arr1.length, -1 );

var len = arr2.length;
// returns 2

var v = arr2[ 0 ];
// returns 1

v = arr2[ 1 ];
// returns 2
```

<a name="method-some"></a>

#### Int8Array.prototype.some( predicate\[, thisArg] )

Tests whether at least one array element passes a test implemented by a `predicate` function.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    return ( v >= 2 );
}

var arr = new Int8Array( [ 1, 2 ] );

var bool = arr.some( predicate );
// returns true
```

A `predicate` function is provided three arguments:

-   `value`: array element
-   `index`: array index
-   `arr`: array on which the method is invoked

To set the callback execution context, provide a `thisArg`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function predicate( v ) {
    this.count += 1;
    return ( v >= 2 );
}

var ctx = {
    'count': 0
};

var arr = new Int8Array( [ 1, 1 ] );

var bool = arr.some( predicate, ctx );
// returns false

var n = ctx.count;
// returns 2
```

<a name="method-sort"></a>

#### Int8Array.prototype.sort( \[compareFunction] )

Sorts an array **in-place** (thus mutating the array on which the method is invoked).

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 2, 3, 0 ] );

// Sort the array (in ascending order):
arr.sort();

var v = arr[ 0 ];
// returns 0

v = arr[ 1 ];
// returns 2

v = arr[ 2 ];
// returns 3
```

By default, the method sorts array elements in ascending order. To impose a custom order, provide a `compareFunction`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
function descending( a, b ) {
    return b - a;
}

var arr = new Int8Array( [ 2, 3, 0 ] );

// Sort the array (in descending order):
arr.sort( descending );

var v = arr[ 0 ];
// returns 3

v = arr[ 1 ];
// returns 2

v = arr[ 2 ];
// returns 0
```

The comparison function is provided two array elements, `a` and `b`, per invocation, and its return value determines the sort order as follows:

-   If the comparison function returns a value **less** than zero, then the method sorts `a` to an index lower than `b` (i.e., `a` should come **before** `b`).
-   If the comparison function returns a value **greater** than zero, then the method sorts `a` to an index higher than `b` (i.e., `b` should come **before** `a`).
-   If the comparison function returns **zero**, then the relative order of `a` and `b` _should_ remain unchanged.

<a name="method-subarray"></a>

#### Int8Array.prototype.subarray( \[begin\[, end]] )

Creates a new typed array view over the same underlying [`ArrayBuffer`][@stdlib/array/buffer] and with the same underlying data type as the host array.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.subarray();
// returns <Int8Array>[ 1, 2, 3 ]

var bool = ( arr1.buffer === arr2.buffer );
// returns true
```

By default, the method creates a typed array view beginning with the first array element. To specify an alternative array index at which to begin, provide a `begin` index (inclusive).

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.subarray( 1 );
// returns <Int8Array>[ 2, 3 ]

var bool = ( arr1.buffer === arr2.buffer );
// returns true
```

By default, the method creates a typed array view which includes all array elements after `begin`. To limit the number of array elements after `begin`, provide an `end` index (exclusive).

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.subarray( 0, 2 );
// returns <Int8Array>[ 1, 2 ]

var bool = ( arr1.buffer === arr2.buffer );
// returns true
```

When a `begin` and/or `end` index is negative, the respective index is determined relative to the last array element.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.subarray( -arr1.length, -1 );
// returns <Int8Array>[ 1, 2 ]

var bool = ( arr1.buffer === arr2.buffer );
// returns true
```

If the method is unable to resolve indices to a non-empty array subsequence, the method returns an empty typed array.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr1 = new Int8Array( [ 1, 2, 3 ] );

var arr2 = arr1.subarray( 10, -1 );
// returns <Int8Array>[]
```

<a name="method-to-locale-string"></a>

#### Int8Array.prototype.toLocaleString( \[locales\[, options]] )

Serializes an array as a locale-specific `string`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var str = arr.toLocaleString();
// returns '1,2,3'
```

<a name="method-to-string"></a>

#### Int8Array.prototype.toString()

Serializes an array as a `string`.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2, 3 ] );

var str = arr.toString();
// returns '1,2,3'
```

<a name="method-values"></a>

#### Int8Array.prototype.values()

Returns an iterator for iterating over array elements.

<!-- eslint-disable stdlib/require-globals -->

```javascript
var arr = new Int8Array( [ 1, 2 ] );

// Create an iterator:
var it = arr.values();

// Iterate over array elements...
var v = it.next().value;
// returns 1

v = it.next().value;
// returns 2

var bool = it.next().done;
// returns true
```

</section>

<!-- /.usage -->

* * *

<!-- Package usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- Package usage examples. -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var randu = require( '@stdlib/random/base/randu' );
var round = require( '@stdlib/math/base/special/round' );
var ctor = require( '@stdlib/array/int8' );

var arr;
var i;

arr = new ctor( 10 );
for ( i = 0; i < arr.length; i++ ) {
    arr[ i ] = round( randu()*100.0 );
}
console.log( arr );
```

</section>

<!-- /.examples -->

<!-- Section to include cited references. If references are included, add a horizontal rule *before* the section. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="references">

</section>

<!-- /.references -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="links">

[mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray

[@stdlib/array/buffer]: https://www.npmjs.com/package/@stdlib/array/tree/main/buffer

</section>

<!-- /.links -->