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compute-range

1.1.0 • Public • Published

Range

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Computes the arithmetic range of an array.

Installation

$ npm install compute-range

For use in the browser, use browserify.

Usage

var range = require( 'compute-range' );

range( arr[, accessor] )

Computes the arithmetic range of an array. For primitive number arrays,

var arr = [ 2, 3, 4, 1 ];
 
var r = range( arr );
// returns [ 1, 4 ]

For object arrays, provide an accessor function for accessing numeric array values

var arr = [
    [1,2],
    [3,3],
    [4,4],
    [6,1]
];
 
function getValue( d ) {
    return d[ 1 ];
}
 
var r = range( arr, getValue );
// returns [ 1, 4 ]

Notes

  • if provided an empty array, the function returns null.
  • the first value of the returned array is always the minimum value and the second value is always the maximum value.

Examples

var range = require( 'compute-range' );
 
var data = new Array( 100 );
for ( var i = 0; i < data.length; i++ ) {
    data[ i ] = Math.random() * 100;
}
console.log( range( data ) );

To run the example code from the top-level application directory,

$ node ./examples/index.js

Tests

Unit

Unit tests use the Mocha test framework with Chai assertions. To run the tests, execute the following command in the top-level application directory:

$ make test

All new feature development should have corresponding unit tests to validate correct functionality.

Test Coverage

This repository uses Istanbul as its code coverage tool. To generate a test coverage report, execute the following command in the top-level application directory:

$ make test-cov

Istanbul creates a ./reports/coverage directory. To access an HTML version of the report,

$ make view-cov

License

MIT license.

Copyright

Copyright © 2014-2015. Athan Reines.

install

npm i compute-range

Downloadsweekly downloads

99

version

1.1.0

license

none

homepage

github.com

repository

Gitgithub

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