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stdlib-bot committed Feb 23, 2024
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1 change: 1 addition & 0 deletions CONTRIBUTORS
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Expand Up @@ -21,6 +21,7 @@ Joey Reed <[email protected]>
Jordan Gallivan <[email protected]>
Joris Labie <[email protected]>
Justin Dennison <[email protected]>
Karthik Prakash <[email protected]>
Marcus Fantham <[email protected]>
Matt Cochrane <[email protected]>
Milan Raj <[email protected]>
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94 changes: 94 additions & 0 deletions complex128/README.md
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Expand Up @@ -1799,6 +1799,100 @@ A few notes:
- If a target array cannot accommodate all values (i.e., the length of source array plus `i` exceeds the target array length), the method throws an error.
- If provided a [typed array][@stdlib/array/typed] which shares an [`ArrayBuffer`][@stdlib/array/buffer] with the target array, the method will intelligently copy the source range to the destination range.

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

#### Complex128Array.prototype.slice( \[start\[, end]] )

Copies a portion of a typed array to a new typed array.

```javascript
var real = require( '@stdlib/complex/real' );
var imag = require( '@stdlib/complex/imag' );

var arr = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );

var out = arr.slice();
// returns <Complex128Array>

var len = out.length;
// returns 4

var z = out.get( 0 );
// returns <Complex128>

var re = real( z );
// returns 1.0

var im = imag( z );
// returns 2.0

z = out.get( len-1 );
// returns <Complex128>

re = real( z );
// returns 7.0

im = imag( z );
// returns 8.0
```

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

```javascript
var imag = require( '@stdlib/complex/imag' );
var real = require( '@stdlib/complex/real' );

var arr = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );

var out = arr.slice( 1 );
// returns <Complex128Array>

var len = out.length;
// returns 3

var z = out.get( 0 );
// returns <Complex128>

var re = real( z );
// returns 3.0

var im = imag( z );
// returns 4.0
```

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

```javascript
var real = require( '@stdlib/complex/real' );
var imag = require( '@stdlib/complex/imag' );

var arr = new Complex128Array( [ 1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 ] );

var out = arr.slice( 1, -1 );
// returns <Complex128Array>

var len = out.length;
// returns 2

var z = out.get( 0 );
// returns <Complex128>

var re = real( z );
// returns 3.0

var im = imag( z );
// returns 4.0

z = out.get( len-1 );
// returns <Complex128>

re = real( z );
// returns 5.0

im = imag( z );
// returns 6.0
```

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

#### Complex128Array.prototype.some( predicate\[, thisArg] )
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51 changes: 51 additions & 0 deletions complex128/benchmark/benchmark.slice.js
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/**
* @license Apache-2.0
*
* Copyright (c) 2023 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var bench = require( '@stdlib/bench' );
var isComplex128Array = require( '@stdlib/assert/is-complex128array' );
var pkg = require( './../package.json' ).name;
var Complex128Array = require( './../lib' );


// MAIN //

bench( pkg+':slice', function benchmark( b ) {
var out;
var arr;
var i;

arr = new Complex128Array( [ 1, 2, 3, 4, 5, 6 ] );

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
out = arr.slice();
if ( typeof out !== 'object' ) {
b.fail( 'should return an object' );
}
}
b.toc();
if ( !isComplex128Array( out ) ) {
b.fail( 'should return a Complex128Array' );
}
b.pass( 'benchmark finished' );
b.end();
});
103 changes: 103 additions & 0 deletions complex128/benchmark/benchmark.slice.length.js
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@@ -0,0 +1,103 @@
/**
* @license Apache-2.0
*
* Copyright (c) 2023 The Stdlib Authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

'use strict';

// MODULES //

var bench = require( '@stdlib/bench' );
var isComplex128Array = require( '@stdlib/assert/is-complex128array' );
var pow = require( '@stdlib/math/base/special/pow' );
var Complex128 = require( '@stdlib/complex/float64' );
var pkg = require( './../package.json' ).name;
var Complex128Array = require( './../lib' );


// FUNCTIONS //

/**
* Creates a benchmark function.
*
* @private
* @param {PositiveInteger} len - array length
* @returns {Function} benchmark function
*/
function createBenchmark( len ) {
var arr;
var i;

arr = [];
for ( i = 0; i < len; i++ ) {
arr.push( new Complex128( i, i ) );
}
arr = new Complex128Array( arr );

return benchmark;

/**
* Benchmark function.
*
* @private
* @param {Benchmark} b - benchmark instance
*/
function benchmark( b ) {
var out;
var i;

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
out = arr.slice();
if ( typeof out !== 'object' ) {
b.fail( 'should return an object' );
}
}
b.toc();
if ( !isComplex128Array( out ) ) {
b.fail( 'should return a Complex128Array' );
}
b.pass( 'benchmark finished' );
b.end();
}
}


// MAIN //

/**
* Main execution sequence.
*
* @private
*/
function main() {
var len;
var min;
var max;
var f;
var i;

min = 1; // 10^min
max = 6; // 10^max

for ( i = min; i <= max; i++ ) {
len = pow( 10, i );
f = createBenchmark( len );
bench( pkg+':slice:len='+len, f );
}
}

main();
70 changes: 70 additions & 0 deletions complex128/docs/types/index.d.ts
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Expand Up @@ -917,6 +917,76 @@ declare class Complex128Array implements Complex128ArrayInterface {
*/
set( value: ArrayLike<number | ComplexLike> | RealOrComplexTypedArray | ComplexLike, i?: number ): void;

/**
* Copies a portion of a typed array to a new typed array.
*
* @param start - starting index (inclusive)
* @param end - ending index (exclusive)
* @throws indices must be integers
* @returns output array
*
* @example
* var real = require( '@stdlib/complex/real' );
* var imag = require( '@stdlib/complex/imag' );
*
* var arr = new Complex128Array( 5 );
*
* arr.set( [ 1.0, -1.0 ], 0 );
* arr.set( [ 2.0, -2.0 ], 1 );
* arr.set( [ 3.0, -3.0 ], 2 );
* arr.set( [ 4.0, -4.0 ], 3 );
* arr.set( [ 5.0, -5.0 ], 4 );
*
* var out = arr.slice();
* // returns <Complex128Array>
*
* var len = out.length;
* // returns 5
*
* var z = out.get( 0 );
* // returns <Complex128>
*
* var re = real( z );
* // returns 1.0
*
* var im = imag( z );
* // returns -1.0
*
* z = out.get( len-1 );
* // returns <Complex128>
*
* re = real( z );
* // returns 5.0
*
* im = imag( z );
* // returns -5.0
*
* out = arr.slice( 1, -2 );
* // returns <Complex128Array>
*
* len = out.length;
* // returns 2
*
* z = out.get( 0 );
* // returns <Complex128>
*
* re = real( z );
* // returns 2.0
*
* im = imag( z );
* // returns -2.0
*
* z = out.get( len-1 );
* // returns <Complex128>
*
* re = real( z );
* // returns 3.0
*
* im = imag( z );
* // returns -3.0
*/
slice( start?: number, end?: number ): Complex128Array;

/**
* Tests whether at least one element in an array passes a test implemented by a predicate function.
*
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