Unzip

Unzip a zipped array (i.e., a nested array of tuples).

Usage

import unzip from 'https://deno.land/x/stdlib_utils_unzip/mod.js';

unzip( arr[, idx] )

Unzips a zipped array (i.e., a nested array of tuples).

var arr = [ [ 1, 'a', 3 ], [ 2, 'b', 4 ] ];

var out = unzip( arr );
// returns [ [ 1, 2 ], [ 'a', 'b' ], [ 3, 4 ] ];

To unzip specific tuple elements, you can provide an array of indices as an optional second argument.

var arr = [ [ 1, 'a', 3 ], [ 2, 'b', 4 ] ];

var out = unzip( arr, [ 0, 2 ] );
// returns [ [ 1, 2 ], [ 3, 4 ] ];

Examples

import unzip from 'https://deno.land/x/stdlib_utils_unzip/mod.js';
import round from 'https://deno.land/x/stdlib_math_base_special_round/mod.js';
import randu from 'https://deno.land/x/stdlib_random_base_randu/mod.js';
import pow from 'https://deno.land/x/stdlib_math_base_special_pow/mod.js';

var arr = new Array( 100 );
var len = 5;

var i;
var j;
for ( i = 0; i < arr.length; i++ ) {
    arr[ i ] = new Array( len );
    for ( j = 0; j < len; j++ ) {
        arr[ i ][ j ] = round( randu() * pow(10, j) );
    }
}
var out = unzip( arr );

console.dir( out );

Notice

This package is part of stdlib, a standard library with an emphasis on numerical and scientific computing. The library provides a collection of robust, high performance libraries for mathematics, statistics, streams, utilities, and more.

For more information on the project, filing bug reports and feature requests, and guidance on how to develop stdlib, see the main project repository.

Community

License

See LICENSE.