nanomath/src/number/type.js

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import {plain} from './helpers.js'
import {BooleanT} from '#boolean/BooleanT.js'
import {Returns} from '#core/Type.js'
import {NumberT} from '#number/NumberT.js'
export const number = plain(a => a)
number.also(BooleanT, Returns(NumberT, a => a ? 1 : 0))