min-max-range

Implementation of range data structures using plain JavaScript arrays. Built with a functional programming approach in mind.

Importing this library

Node Modules

• Run npm install min-max-range
• Import the utility functions you need and use them in your code.

CDN

• Put the following script tag <script src="https://cdn.jsdelivr.net/npm/min-max-range@1/dist/min-max-range.umd.min.js"></script> in the head of your HTML file.
• Then you can access the library with the global variable minMaxRange

Data Types

EmptyRange

type EmptyRange = [];

Range1D

type Range1D = [number, number];

Range2D

type Range2D = [Range1D, Range1D];

MultiDimRange

type MultiDimRange = [Range1D, Range1D, ...Range1D[]];

NonEmptyRange

type NonEmptyRange = Range1D | MultiDimRange;

Range

type Range = EmptyRange | NonEmptyRange;

Coordinates2D

type Coordinates2D = [number, number];

Transform

type Transform<Input, Output> = (value: Input) => Output;

Utility Functions

isRange: (value) => boolean

Check if value is range.

• value (any): Value to test.

isEmptyRange: (value) => boolean

Check if value is empty range.

• value (any): Value to test.

isNonEmptyRange: (value) => boolean

Check if value is non-empty range.

• value (any): Value to test.

isRange1D: (value) => boolean

Check if value is one-dimensional range.

• value (any): Value to test.

isRange2D: (value) => boolean

Check if value is two-dimensional range.

• value (any): Value to test.

isMultiDimRange: (value) => boolean

Check if value is multi-dimensional range.

• value (any): Value to test.

min: (range) => undefined | number | number[]

Return minimum value of each dimension of a range.

• range (Range): The range.

Example

var minOfRange = min([-1, 1]);

console.log(minOfRange);
// expected output: -1

max: (range) => undefined | number | number[]

Return maximum value of each dimension of a range.

• range (Range): The range.

Example

var maxOfRange = max([1, -1]);

console.log(maxOfRange);
// expected output: 1

mean: (range) => undefined | number | number[]

Return mean of each dimension of a range.

• range (Range): The range.

Example

var meanOfRange = mean([-1, 1]);

console.log(meanOfRange);
// expected output: 0

first: (range) => undefined | number | number[]

Return the first value of each dimension of a range.

• range (Range): The range.

Example

var firstOfRange = first([0, 1]);

console.log(firstOfRange);
// expected output: 0

last: (range) => undefined | number | number[]

Return the last value of each dimension of a range.

• range: (Range): The range.

Example

var lastOfRange = last([0, 1]);

console.log(lastOfRange);
// expected output: 1

length: (range) => number | number[]

Return length of each dimension of a range.

• range (Range): The range.

Example

var lengthOfRange = length([-1, 1]);

console.log(lengthOfRange);
// expected output: 2

bottomLeft: (range) => Coordinates2D

Return bottom-left coordinates of two-dimensional range.

• range (Range2D): Two-dimensional range.

Example

var coords = bottomLeft([[0, 1], [0, 1]]);

console.log(coords);
// expected output: Array [0, 0]

bottomRight: (range) => Coordinates2D

Return bottom-right coordinates of two-dimensional range.

• range (Range2D): Two-dimensional range.

Example

var coords = bottomRight([[0, 1], [0, 1]]);

console.log(coords);
// expected output: Array [1, 0]

topLeft: (range) => Coordinates2D

Return top-left coordinates of two-dimensional range.

• range (Range2D): Two-dimensional range.

Example

var coords = topLeft([[0, 1], [0, 1]]);

console.log(coords);
// expected output: Array [0, 1]

topRight: (range) => Coordinates2D

Return top-right coordinates of two-dimensional range.

• range (Range2D): Two-dimensional range.

Example

var coords = topRight([[0, 1], [0, 1]]);

console.log(coords);
// expected output: Array [1, 1]

shift: (range, delta) => Range

Move range by a specified delta.

• range (Range): Range to move.
• delta (number | number[]): Delta to move range by. Has to have equal length as range in case of multi-dimensional ranges.

Example

var shiftedRange = shift([0, 1], -0.5);

console.log(shiftedRange);
// expected output: Array [-0.5, 0.5]

sort: (range) => Range

Return range with values in each dimension sorted from lowest to highest.

• range: (Range): The range.

Example

var sortedRange = sort([1, -1]);

console.log(sortedRange);
// expected output: Array [-1, 1]

reverse: (range) => Range

Return range with values in each dimensions swapped.

• range (Range): The range.

Example

var reversedRange = reverse([0, 1]);

console.log(reversedRange);
// expected output: Array [1, 0]

inside: (range) => Transform<number | number[], boolean>

Return method to check if value is included in range.

• range (Range): Reference range.

Example

var isInside = inside([0, 1]);

console.log(isInside(0.5));
// expected output: true

includes: (range) => Transform<Range, boolean>

Return method to check if one range is included in another.

• range (Range): Reference range.

Example

var isIncluded = includes([-1, 1]);

console.log(isIncluded([0, 1]));
// expected output: true

partOf: (range) => Transform<Range, boolean>

Return method to check if range is part of another.

• range (Range): Reference range.

Example

var isPartOf = partOf([0, 1]);

console.log(isPartOf([-1, 1]));
// expected output: true

intersect: (range) => Transform<Range, Range>

Return method to determine intersection of range with reference.

• range (Range): Reference range.

Example

var intersection = intersect([-1, 1]);

console.log(intersection([0, 2]));
// expected output: Array [0, 1]

NPM Scripts

• npm install: Install dependencies
• npm test: Run test suite
• npm start: Run npm run build in watch mode
• npm run test:watch: Run test suite in interactive watch mode
• npm run test:prod: Run linting and generate coverage
• npm run build: Generate bundles and typings, create docs
• npm run lint: Lints code

Contributing

Pull requests are welcome! Please include new tests for your code and make sure that all tests succeed running npm test.