list

219 bytes

Usage

Given a start, end, value, and step size returns a list with values from start to end by step size.

The interface is identical to range.

A hat tip to Python’s range functionality

import * as _ from 'radashi'

_.list(3) // [0, 1, 2, 3]
_.list(0, 3) // [0, 1, 2, 3]
_.list(0, 3, 'y') // [y, y, y, y]
_.list(0, 3, () => 'y') // [y, y, y, y]
_.list(0, 3, i => i) // [0, 1, 2, 3]
_.list(0, 3, i => `y${i}`) // [y0, y1, y2, y3]
_.list(0, 3, {}) // [{}, {}, {}, {}]
_.list(0, 6, i => i, 2) // [0, 2, 4, 6]

Signatures

list(size)

When givin a single argument, it’s treated as the size. Returns a list with values from 0 to size.

_.list(3) // [0, 1, 2, 3]

list(start, end)

When given two arguments, they’re treated as the start and end. Returns a list with values from start to end

_.list(2, 6) // [2, 3, 4, 5, 6]

list(start, end, value)

When given a third argument it’s treated as the value to be used in the list. If the value is a function it will be called, with an index argument, to create every value.

_.list(2, 4, {}) // [{}, {}, {}]
_.list(2, 4, null) // [null, null, null]
_.list(2, 4, i => i) // [2, 3, 4]

list(start, end, value, step)

When given a fourth argument it’s treated as the step size to skip when generating values from start to end.

_.list(2, 4, i => i, 2) // [2, 4]
_.list(25, 100, i => i, 25) // [25, 50, 75, 100]