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107 changes: 107 additions & 0 deletions base/last-code-point/README.md
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<!--
@license Apache-2.0
Copyright (c) 2024 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.
-->

# lastCodePoint

> Return the last `n` Unicode code points of a string.
<section class="usage">

## Usage

```javascript
var lastCodePoint = require( '@stdlib/string/base/last-code-point' );
```

#### lastCodePoint( str, n )

Returns the last `n` Unicode code points of a string.

```javascript
var s = lastCodePoint( 'JavaScript', 1 );
// returns 't'

s = lastCodePoint( 'Hello World', 5 );
// returns 'World'

s = lastCodePoint( 'Good Evening', 9 );
// returns 'd Evening'

s = lastCodePoint( 'foo bar', 10 );
// returns 'foo bar'
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

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

```javascript
var lastCodePoint = require( '@stdlib/string/base/last-code-point' );

var str = lastCodePoint( 'Hello World', 1 );
// returns 'd'

str = lastCodePoint( 'JavaScript', 6 );
// returns 'Script'

str = lastCodePoint( 'ASCII', 2 );
// returns 'II'

str = lastCodePoint( 'index', 10 );
// returns 'index'

str = lastCodePoint( 'अनुच्छेद', 1 );
// returns 'द'

str = lastCodePoint( '六书/六書', 3 );
// returns '/六書'
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">


</section>

<!-- /.related -->

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

<section class="links">

<!-- <related-links> -->


<!-- </related-links> -->

</section>

<!-- /.links -->
60 changes: 60 additions & 0 deletions base/last-code-point/benchmark/benchmark.js
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/**
* @license Apache-2.0
*
* Copyright (c) 2024 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 isString = require( '@stdlib/assert/is-string' ).isPrimitive;
var pkg = require( './../package.json' ).name;
var last = require( './../lib' );


// MAIN //

bench( pkg, function benchmark( b ) {
var values;
var out;
var i;

values = [
'hello world',
'new',
'JavaScript',
'beep boop',
'foo bar',
'xyz abc',
'🐶🐮🐷🐰🐸',
'अनुच्छेद'
];

b.tic();
for ( i = 0; i < b.iterations; i++ ) {
out = last( values[ i%values.length ], 1 );
if ( typeof out !== 'string' ) {
b.fail( 'should return a string' );
}
}
b.toc();
if ( !isString( out ) ) {
b.fail( 'should return a string' );
}
b.pass( 'benchmark finished' );
b.end();
});
29 changes: 29 additions & 0 deletions base/last-code-point/docs/repl.txt
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{{alias}}( str, n )
Returns the last `n` Unicode code points of a string.

Parameters
----------
str: string
Input string.

n: integer
Number of Unicode code points to return.

Returns
-------
out: string
Output string.

Examples
--------
> var out = {{alias}}( 'hello world', 1 )
'd'
> out = {{alias}}( 'JavaScript', 6 )
'Script'
> out = {{alias}}( 'अनुच्छेद', 1 )
'द'

See Also
--------

49 changes: 49 additions & 0 deletions base/last-code-point/docs/types/index.d.ts
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/*
* @license Apache-2.0
*
* Copyright (c) 2024 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.
*/

// TypeScript Version: 4.1

/**
* Returns the last `n` Unicode code points of a string.
*
* @param str - input string
* @param n - number of code points to return
* @returns output string
*
* @example
* var out = last( 'Hello World', 1 );
* // returns 'd'
*
* @example
* var out = last( 'JavaScript', 6 );
* // returns 'Script'
*
* @example
* var out = last( 'New', 5 );
* // returns 'New'
*
* @example
* var out = last( 'अनुच्छेद', 1 );
* // returns 'द'
*/
declare function last( str: string, n: number ): string;


// EXPORTS //

export = last;
57 changes: 57 additions & 0 deletions base/last-code-point/docs/types/test.ts
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/*
* @license Apache-2.0
*
* Copyright (c) 2024 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.
*/

import last = require( './index' );


// TESTS //

// The function returns a string...
{
last( 'abc', 1 ); // $ExpectType string
}

// The compiler throws an error if the function is provided a value other than a string...
{
last( true, 1 ); // $ExpectError
last( false, 1 ); // $ExpectError
last( null, 1 ); // $ExpectError
last( undefined, 1 ); // $ExpectError
last( 5, 1 ); // $ExpectError
last( [], 1 ); // $ExpectError
last( {}, 1 ); // $ExpectError
last( ( x: number ): number => x, 1 ); // $ExpectError
}

// The compiler throws an error if the function is provided a second argument that is not a number...
{
last( 'abc', true ); // $ExpectError
last( 'abc', false ); // $ExpectError
last( 'abc', null ); // $ExpectError
last( 'abc', 'abc' ); // $ExpectError
last( 'abc', [] ); // $ExpectError
last( 'abc', {} ); // $ExpectError
last( 'abc', ( x: number ): number => x ); // $ExpectError
}

// The compiler throws an error if the function is provided an unsupported number of arguments...
{
last(); // $ExpectError
last( 'abc' ); // $ExpectError
last( 'abc', 1, 2 ); // $ExpectError
}
36 changes: 36 additions & 0 deletions base/last-code-point/examples/index.js
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/**
* @license Apache-2.0
*
* Copyright (c) 2024 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';

var lastCodePoint = require( './../lib' );

console.log( lastCodePoint( 'Hello World', 1 ) );
// => 'd'

console.log( lastCodePoint( 'JavaScript', 6 ) );
// => 'Script'

console.log( lastCodePoint( 'index', 10 ) );
// => 'index'

console.log( lastCodePoint( 'अनुच्छेद', 1 ) );
// => 'द'

console.log( lastCodePoint( '六书/六書', 3 ) );
// => '/六書'
43 changes: 43 additions & 0 deletions base/last-code-point/lib/index.js
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/**
* @license Apache-2.0
*
* Copyright (c) 2024 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';

/**
* Return the last `n` Unicode code points of a string.
*
* @module @stdlib/string/base/last-code-point
*
* @example
* var last = require( '@stdlib/string/base/last-code-point' );
*
* var out = last( 'Hello World', 1 );
* // returns 'd'
*
* out = last( 'अनुच्छेद', 1 );
* // returns 'द';
*/

// MODULES //

var main = require( './main.js' );


// EXPORTS //

module.exports = main;
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