@bedard/utils
v0.33.1
Published
[](https://github.com/scottbedard/utils/actions) [](https://codecov.io/gh/sco
Downloads
222
Readme
@bedard/utils
This repository acts as my own personal lodash. It contains a number of utility types and functions that I found myself duplicating between projects. I do not anticipate breaking changes, but I'm also not ruling it out. Upgrade with caution.
Installation
The recommended installation method is via NPM.
npm install @bedard/utilsAlternatively, the functions maybe be accessed via a CDN. When using the CDN, the library will be exposed globally as BedardUtils.
<script src="https://unpkg.com/@bedard/utils"></script>Functions
Animation
createEasingFunctioneaseInSineeaseOutSineeaseInOutSineeaseInQuadeaseOutQuadeaseInOutQuadeaseInCubiceaseOutCubiceaseInOutCubiceaseInQuarteaseOutQuarteaseInOutQuarteaseInQuinteaseOutQuinteaseInOutQuinteaseInExpoeaseOutExpoeaseInOutExpoeaseInCirceaseOutCirceaseInOutCirceaseInBackeaseOutBackeaseInOutBackeaseInElasticeaseOutElasticeaseInOutElasticeaseInBounceeaseOutBounceeaseInOutBounce
Color
Math
addVectorsangleFrombilerpcolsdegreesToRadiansflattenColsflattenRowsflipintersectisEvenlerplerpVectorsmeasurepolygonradiansToDegreesrollrotateMatrixrotateVectorrowsscaleslope
Utility
addVectors
Add vectors together.
import { addVectors } from '@bedard/utils'
addVectors([1, 2], [3, 4]) // [4, 6]angleFrom
Calculate angled distance from a vector. An angle of 0 degrees will track along the X axis, with positive angles rotating counter-clockwise.
import { angleFrom } from '@bedard/utils'
angleFrom([0, 0], 90, 1) // [0, 1] (approximate)bilerp
Bi-linear interpolation between vectors.
import { bilerp } from '@bedard/utils'
bilerp([0, 0], [10, 10], 0.5) // [5, 5]
cols
Chunk a square matrix into columns. Note that the source matrix must be provided in row-major order.
import { cols } from '@bedard/utils'
cols([
0, 1, 2,
3, 4, 5,
6, 7, 8,
]) // [[0, 3, 6], [1, 4, 7], [2, 5, 8]]createEasingFunction
Create an easing function from cubic-bezier points. Note that the included easing functions do not use this utility. They are simpler mathematical functions, and do not produce quite the same results as easing functions created using this utility.
import { createEasingFunction } from '@bedard/utils'
const linear = createEasingFunction(0, 0, 1, 1)
linear(0.5) // 0.5deepEqual
Deep object comparison.
import { deepEqual } from '@bedard/utils'
deepEqual({ foo: { bar: 1 }}, { foo: { bar: 1 }}) // truedegreesToRadians
Convert degrees to radians.
import { degreesToRadians } from '@bedard/utils'
degreesToRadians(180) // 3.141592653589793
easeInSine
Easing function that follows this curve.
import { easeInSine } from '@bedard/utils'
easeInSine(0.5) // 0.2928932188134524easeOutSine
Easing function that follows this curve.
import { easeOutSine } from '@bedard/utils'
easeOutSine(0.5) // 0.7071067811865475easeInOutSine
Easing function that follows this curve.
import { easeInOutSine } from '@bedard/utils'
easeInOutSine(0.5) // 0.49999999999999994easeInQuad
Easing function that follows this curve.
import { easeInQuad } from '@bedard/utils'
easeInQuad(0.5) // 0.25easeOutQuad
Easing function that follows this curve.
import { easeOutQuad } from '@bedard/utils'
easeOutQuad(0.5) // 0.75easeInOutQuad
Easing function that follows this curve.
import { easeInOutQuad } from '@bedard/utils'
easeInOutQuad(0.5) // 0.5easeInCubic
Easing function that follows this curve.
import { easeInCubic } from '@bedard/utils'
easeInCubic(0.5) // 0.125easeOutCubic
Easing function that follows this curve.
import { easeOutCubic } from '@bedard/utils'
easeOutCubic(0.5) // 0.875easeInOutCubic
Easing function that follows this curve.
import { easeInOutCubic } from '@bedard/utils'
easeInOutCubic(0.5) // 0.5easeInQuart
Easing function that follows this curve.
import { easeInQuart } from '@bedard/utils'
easeInQuart(0.5) // 0.0625easeOutQuart
Easing function that follows this curve.
import { easeOutQuart } from '@bedard/utils'
easeOutQuart(0.5) // 0.9375easeInOutQuart
Easing function that follows this curve.
import { easeInOutQuart } from '@bedard/utils'
easeInOutQuart(0.5) // 0.5easeInQuint
Easing function that follows this curve.
import { easeInQuint } from '@bedard/utils'
easeInQuint(0.5) // 0.03125easeOutQuint
Easing function that follows this curve.
import { easeOutQuint } from '@bedard/utils'
easeOutQuint(0.5) // 0.96875easeInOutQuint
Easing function that follows this curve.
import { easeInOutQuint } from '@bedard/utils'
easeInOutQuint(0.5) // 0.5easeInExpo
Easing function that follows this curve.
import { easeInExpo } from '@bedard/utils'
easeInExpo(0.5) // 0.03125easeOutExpo
Easing function that follows this curve.
import { easeOutExpo } from '@bedard/utils'
easeOutExpo(0.5) // 0.96875easeInOutExpo
Easing function that follows this curve.
import { easeInOutExpo } from '@bedard/utils'
easeInOutExpo(0.5) // 0.5easeInCirc
Easing function that follows this curve.
import { easeInCirc } from '@bedard/utils'
easeInCirc(0.5) // 0.1339745962155614easeOutCirc
Easing function that follows this curve.
import { easeOutCirc } from '@bedard/utils'
easeOutCirc(0.5) // 0.8660254037844386easeInOutCirc
Easing function that follows this curve.
import { easeInOutCirc } from '@bedard/utils'
easeInOutCirc(0.5) // 0.5easeInBack
Easing function that follows this curve.
import { easeInBack } from '@bedard/utils'
easeInBack(0.5) // -0.08769750000000004easeOutBack
Easing function that follows this curve.
import { easeOutBack } from '@bedard/utils'
easeOutBack(0.5) // 1.0876975easeInOutBack
Easing function that follows this curve.
import { easeInOutBack } from '@bedard/utils'
easeInOutBack(0.5) // 0.5easeInElastic
Easing function that creates an elastic-in effect.
import { easeInElastic } from '@bedard/utils'
easeInElastic(0.5) // -0.015625000000000045easeOutElastic
Easing function that creates an elastic-out effect.
import { easeOutElastic } from '@bedard/utils'
easeOutElastic(0.5) // 1.015625easeInOutElastic
Easing function that creates an elastic-in-out effect.
import { easeInOutElastic } from '@bedard/utils'
easeInOutElastic(0.5) // 0.5easeInBounce
Easing function that creates a bounce-in effect.
import { easeInBounce } from '@bedard/utils'
easeInBounce(0.5) // 0.234375easeOutBounce
Easing function that creates a bounce-out effect.
import { easeOutBounce } from '@bedard/utils'
easeOutBounce(0.5) // 0.765625easeInOutBounce
Easing function that creates a bounce-in-out effect.
import { easeInOutBounce } from '@bedard/utils'
easeInOutBounce(0.5) // 0.5entries
Type safe wrapper around Object.entries
import { entries } from '@bedard/utils'
entries({ foo: 'bar' }) // [['foo', 'bar']]flattenCols
Flatten an array of columns to a matrix in row-major order.
import { flattenCols } from '@bedard/utils'
flattenCols([
[0, 3, 6],
[1, 4, 7],
[2, 5, 8],
]) // [0, 1, 2, 3, 4, 5, 6, 7, 8]flattenRows
Flatten an array of rows to a matrix in row-major order.
import { flattenRows } from '@bedard/utils'
flattenRows([
[0, 1, 2],
[3, 4, 5],
[6, 7, 8],
]) // [0, 1, 2, 3, 4, 5, 6, 7, 8]flip
Convert between rows and columns. A good way to visualize this operation is holding a card by the top-left and bottom-right corners and flipping it over.
import { flip } from '@bedard/utils'
flip([
[0, 1, 2],
[3, 4, 5],
[6, 7, 8],
]) // [[0, 3, 6], [1, 4, 7], [2, 5, 8]]hslToRgb
Convert [hue, saturation, lightness, alpha?] to [red, green, blue, alpha] values.
import { hslToRgb } from '@bedard/utils'
hslToRgb([0, 1, 0.5]) // [255, 0, 0, 1]intersect
Intersect two-dimensional lines. Returns undefined if lines are parellel.
import { intersect } from '@bedard/utils'
intersect([[-1, 0], [1, 0]], [[0, 1], [0, -1]]) // [0, 0]isEmail
A fairly permissive email test where the value must be shaped [email protected], and contain exactly one @ characters.
import { isEmail } from '@bedard/utils'
isEmail('[email protected]') // trueisEven
Test if a number is even.
import { isEven } from '@bedard/utils'
isEven(2) // truekeys
Type-safe wrapper around Object.keys
import { keys } from '@bedard/utils'
keys({ foo: 'bar' }) // ['foo']lerp
Linear interpolation between numbers.
import { lerp } from '@bedard/utils'
lerp(0, 10, 0.5) // 5lerpColors
Linear interpolation between colors.
import { lerpColors } from '@bedard/utils'
lerpColors('#000000', '#ffffff') // '#808080'lerpVectors
Linear interpolation between two vectors. This function is similar to bilerp, but for vectors of any size, or even vectors of different sizes.
import { lerpVectors } from '@bedard/utils'
lerpVectors([0, 0, 0], [1, 2, 3], 0.5) // [0.5, 1, 1.5]measure
Measure the distance between two vectors.
import { measure } from '@bedard/utils'
// arguments can be provided as a pair of vectors
measure([0, 0], [3, 4]) // 5
// or as a single line argument
measure([[0, 0], [3, 4]]) // 5parse
A type-safe wrapper around JSON.parse. This utility is complimented by stringify, Json, and UnwrapJson.
import { stringify } from '@bedard/utils'
stringify({ foo: 'bar' }) // '{"foo":"bar"}' as Json<{ foo: string }>parseColor
Parse an RGB string to [red, green, blue, alpha] values. An error will be thrown if the value is not valid.
import { parseColor } from '@bedard/utils'
parseColor('#123456') // [18, 52, 86, 0]polygon
Create a regular polygon. The first argument defines the number of points, with the second defining the circumradius. Points start from the 12 o'clock position, and rotate counter-clockwise around the origin.
import { polygon } from '@bedard/utils'
polygon(4, 1) // [[0, 1], [-1, 0], [0, -1], [1, 0]] (approximate)radiansToDegrees
Convert radians to degrees.
import { radiansToDegrees } from '@bedard/utils'
radiansToDegrees(Math.PI) // 180roll
Roll the start of an array forwards or backwards.
import { roll } from '@bedard/utils'
roll([0, 1, 2], 1) // [1, 2, 0]rgbToHsl
Convert [red, green, blue, alpha?] to [hue, saturation, lightness, alpha] values.
import { rgbToHsl } from '@bedard/utils'
rgbToHsl([255, 0, 0]) // [0, 1, 0.5, 1]rotateMatrix
Rotate a square matrix. Positive values apply clockwise rotations.
import { rotateMatrix } from '@bedard/utils'
rotateMatrix([
0, 1, 2,
3, 4, 5,
6, 7, 8,
], 1) // [6, 3, 0, 7, 4, 1, 8, 5, 2]rotateVector
Rotate a vector counter-clockwise around the origin.
import { rotateVector } from '@bedard/utils'
rotateVector([0, 1], 90) // [-1, 0] (approximate)rows
Chunk a square matrix into rows. Note that the source matrix must be provided in row-major order.
import { rows } from '@bedard/utils'
rows([
0, 1, 2,
3, 4, 5,
6, 7, 8,
]) // [[0, 1, 2], [3, 4, 5], [6, 7, 8]]scale
Multiple a vector by a number.
import { scale } from '@bedard/utils'
scale([1, 2], 2) // [2, 4]slope
Calculate the slope of a line.
import { slope } from '@bedard/utils'
// arguments can be provided as a pair of vectors
slope([0, 0], [1, 1]) // 1
// or as a single line argument
slope([[0, 0], [1, 1]]) // 1stringify
A type-safe wrapper around JSON.stringify. This utility is complimented by parse, Json, and UnwrapJson
import { parse, stringify } from '@bedard/utils'
const json = stringify({ foo: 'bar' })
const obj = parse(json) // { foo: string }timeout
Resolve a promise after a given duration
import { timeout } from '@bedard/utils'
await timeout(100)stringifyColor
Convert [red, green, blue, alpha?] values to string using hexadecimal notation.
import { stringifyColor } from '@bedard/utils'
stringifyColor([255, 0, 0]) // #ff0000toKeyedObjects
Create keyed objects from an array.
import { toKeyedObjects } from '@bedard/utils'
toKeyedObjects([1, 2], 'foo') // [{ foo: 1 }, { foo: 2 }]Types
Abs<T>AddDigits<T, U>AllEqual<Sources, Value>AND<T, U>BitBreakWords<T>ByteCamelCase<T>CamelCaseKeys<T>CamelCaseKeysDeep<T>DecimalDifference<A, B>Digits<T>Either<T, U>Equal<A, B>Expect<T>First<T>HexHexColor<T>Intersection<A, B>IsFloat<T>IsInteger<T>IsNegative<T>IsPositive<T>Join<Parts, Delimeter>Json<T>KebabCase<T>KebabCaseKeys<T>KebabCaseKeysDeep<T>Last<T>LastDigit<T>Line<T>MapCapitalize<T>MapLowercase<T>MapUppercase<T>MaybeArray<T>Methods<T>MUX<T, U, S>NAND<T, U>Negate<T>NOR<T, U>NOT<T, U>Not<T>OmitStartsWith<T, U>OmitType<T, U>Opaque<T, Token>OptionalKeys<T, U>OR<T, U>PadDigits<T, U>PascalCase<T>PascalCaseKeys<T>PascalCaseKeysDeep<T>PickStartsWith<T, U>PickType<T, U>Pop<T>Properties<T>RequiredKeys<T, U>RgbColor<T>ScreamingSnakeCase<T>ScreamingSnakeCaseKeys<T>ScreamingSnakeCaseKeysDeep<T>Shift<T>SnakeCase<T>SnakeCaseKeys<T>SnakeCaseKeysDeep<T>Split<Source, Delimeter>StartsWith<T, U>SymmetricDifference<A, B>ToNumber<T>Transparent<T>Trim<T>UnwrapJson<T>UnwrapOpaque<T>ValueOf<T>Vec<T>Without<A, B>XNOR<T, U>XOR<T, U>
Abs<T>
Type the absolute value of T
import { Abs } from '@bedard/utils'
type Test = Abs<-5> // 5AddDigits<T, U>
Add two decimal digits
import { AddDigits } from '@bedard/utils'
type Test = AddDigits<1, 2> // 3AllEqual<Sources, Value>
Types true if all Sources equal Value.
import { AllEqual } from '@bedard/utils'
type Test1 = AllEqual<[1, 1], 1> // true
type Test2 = AllEqual<[1, 2], 1> // falseAND<T, U>
Logical AND gate
import { AND } from '@bedard/utils'
type Test = AND<1, 1> // 1Bit
Union of bit values
import { Bit } from '@bedard/utils'
type Test = Bit // 0 | 1BreakWords<T>
Explode a string by common word breaks. This currently includes spaces, hyphens, underscores, and casing changes.
import { BreakWords } from '@bedard/utils'
type Test = BreakWords<'one twoThree-four'> // ['one', 'two', 'Three', 'four']Byte
A union of all numbers that can be represented by a single byte (0 - 255).
import { Byte } from '@bedard/utils'
const n: Byte = 255CamelCase<T>
Convert a string to camel case.
import { CamelCase } from '@bedard/utils'
type Test = CamelCase<'foo-bar'> // 'fooBar'CamelCaseKeys<T>
Camel case object keys.
import { CamelCaseKeys } from '@bedard/utils'
type Test = CamelCaseKeys<{ foo_bar: any }> // { fooBar: any }CamelCaseKeysDeep<T>
Deeply camel case object keys.
import { CamelCaseKeysDeep } from '@bedard/utils'
type Test = CamelCaseKeysDeep<{ foo_bar: { one_two: any }}> // { fooBar: { oneTwo: any }}Decimal
Union of decimal values
import { Decimal } from '@bedard/utils'
type Test = Decimal // 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9Digits<T>
Explode the digits of a positive integer
import { Digits } from '@bedard/utils'
type Test = Digits<123> // [1, 2, 3]Difference<A, B>
Elements of A that are not elements of B. For unions, this is the same as the Exclude utility.
import { Difference } from '@bedard/utils'
type Test = Difference<{ a: any, b: any }, { b: any, c: any }> // { a: any }Either<T, U>
Create an exclusive or between two types. Note that for objects, this differs from a union type in that keys are strictly matched.
import { Either } from '@bedard/utils'
type Test = Either<{ foo: any }, { bar: any }>
const a: Test = { foo } // pass
const b: Test = { bar } // pass
const c: Test = { foo, bar } // failAdditionally, a tuple can be provided for a chained XOR.
type Test = XOR<[1, 2, 3]>
const a: Test = 1 // pass
const b: Test = 2 // pass
const c: Test = 3 // pass
const d: Test = 4 // failEqual<A, B>
Types true if A and B are equal. This is mainly used with Expect to verify that types are working as expected. See NotEqual for the inverse of this type.
import { Expect, Equal } from '@bedard/utils'
type Test = Expect<Equal<number, number>>Expect<T>
Verify that T is true. This allows for assertions to be made using the type system. See Equal and NotEqual for more usage examples.
import { Expect } from '@bedard/utils'
type Test = Expect<true>First<T>
Extract the first element of a string or array.
import { First } from '@bedard/utils'
type Test1 = First<'abc'> // 'a'
type Test2 = First<[1, 2, 3]>, // 1Hex
A hexadecimal character
import { Hex } from '@bedard/utils'
const char: Hex = 'a'HexColor<T>
Validate a hexadecimal color value
import { HexColor } from '@bedard/utils'
const color = <T>(val: HexColor<T>) => val
color('#abc')Intersection<A, B>
The intersection of A and B, giving preference to A.
import { Intersection } from '@bedard/utils'
type Test = Intersection<{ a: any, b: number }, { c: string, d: any }> // { b: number }IsFloat<T>
Test if number is a float
import { IsInteger } from '@bedard/utils'
type Test = IsFloat<1.5> // trueIsInteger<T>
Test if number is an integer
import { IsInteger } from '@bedard/utils'
type Test = IsInteger<1> // trueIsNegative<T>
Test if number is less than zero
import { IsNegative } from '@bedard/utils'
type Test = IsNegative<-1> // trueIsPositive<T>
Test if number is greater than zero
import { IsPositive } from '@bedard/utils'
type Test = IsPositive<1> // trueJoin<Parts, Delimeter>
Join Parts by Delimeter. This type is the opposite of Split.
import { Join } from '@bedard/utils'
type Test1 = Join<['a', 'b', 'c']> // 'abc'
type Test2 = Join<['a', 'b', 'c'], '.'> // 'a.b.c'Json<T>
Encodes a JSON string with underlying type information. This utility is complimented by parse, stringify, and UnwrapJson.
import { Json } from '@bedard/utils'
type Test = Json<{ foo: 'bar' }> // stringKebabCase<T>
Convert a string to kebab case.
import { KebabCase } from '@bedard/utils'
type Test = KebabCase<'fooBar'> // 'foo-bar'KebabCaseKeys<T>
Kebab case object keys.
import { KebabCaseKeys } from '@bedard/utils'
type Test = KebabCaseKeys<{ foo_bar: any }> // { 'foo-bar': any }KebabCaseKeysDeep<T>
Deeply kebab case object keys.
import { KebabCaseKeysDeep } from '@bedard/utils'
type Test = KebabCaseKeysDeep<{ foo_bar: { one_two: any }}> // { 'foo-bar': { 'one-two': any }}Last<T>
Extract the last element of a string or array.
import { Last } from '@bedard/utils'
type Test1 = Last<'abc'> // 'c'
type Test2 = Last<[1, 2, 3]>, // 3LastDigit<T>
Get the last digit of a number
import { LastDigit } from '@bedard/utils'
type Test1 = LastDigit<12> // 2
type Test2 = LastDigit<1.5> // 5Line<T>
Describes a straight line between two vectors of length T.
import { Line } from '@bedard/utils'
type Test = Line<2> // [[number, number], [number, number]]MapCapitalize<T>
Capitalize the first letter of each string.
import { MapCapitalize } from '@bedard/utils'
type Test = MapLowercase<['foo', 'bar']> // ['Foo', 'Bar']MapLowercase<T>
Map strings to lowercase.
import { MapLowercase } from '@bedard/utils'
type Test = MapLowercase<['A', 'B']> // ['a', 'b']MapUppercase<T>
Map strings to uppercase.
import { MapUppercase } from '@bedard/utils'
type Test = MapUppercase<['a', 'b']> // ['A', 'B']MaybeArray<T>
Singular or array of T
import { MaybeArray } from '@bedard/utils'
type Test = MaybeArray<number> // number | number[]Methods<T>
Create a string union of methods from T. This is the inverse of Properties<T>
import { Methods } from '@bedard/utils'
type Test = Methods<{ foo: string, bar(): any }> // 'bar'MUX<T, U, S>
Logical MUX gate
import { MUX } from '@bedard/utils'
type Test = MUX<1, 0, 0> // 1NAND<T, U>
Logical NAND gate
import { NAND } from '@bedard/utils'
type Test = NAND<0, 0> // 1Negate<T>
Reverse the sign of a number
import { Negate } from '@bedard/utils'
type Test = Negate<1> // -1NOR<T, U>
Logical NOR gate
import { NOR } from '@bedard/utils'
type Test = NOR<0, 0> // 1NOT<T>
Reverse the Bit value of T.
import { NOT } from '@bedard/utils'
type Test = NOT<1> // /0Not<T>
Reverse the boolean value of T.
import { Not } from '@bedard/utils'
type Test = Not<true> // falseOmitStartsWith<T, U>
Omit keys of T that start with U.
import { OmitStartsWith } from '@bedard/utils'
type Test = OmitStartsWith<{ FooOne: void; FooTwo: void; BarThree: void }, 'Bar'> // { FooOne: void; FooTwo: void }OmitType<T, U>
Omit keys of T that extend U. This is the inverse of PickType<T, U>.
import { OmitType } from '@bedard/utils'
type Test = OmitType<{ foo: string, bar: number }, string> // { bar: number }Opaque<T, Token>
Opaque type T with an optional Token. For more on opaque types, this article is a great place to start.
import { Opaque } from '@bedard/utils'
type USD = Opaque<number, 'usd'>
const dollars = 5 as USDOptionalKeys<T, U>
Get optional keys from T, or make keys U of T optional.
import { OptionalKeys } from '@bedard/utils'
type Test1 = OptionalKeys<{ foo?: any, bar: any }> // 'foo'
type Test2 = OptionalKeys<{ foo: any, bar: any }, 'foo'> // { foo?: any, bar: any }OR<T, U>
Logical OR gate
import { OR } from '@bedard/utils'
type Test = OR<0, 1> // 1PadDigits<T, U>
Pad two numeric vectors so they are the same size
import { PadVec } from '@bedard/utils'
type Test = PadDigits<[1, 2], [3]> // [ [1, 2], [0, 3] ]PascalCase<T>
Convert a string to pascal case.
import { PascalCase } from '@bedard/utils'
type Test = PascalCase<'foo-bar'> // 'FooBar'PascalCaseKeys<T>
Kebab case object keys.
import { PascalCaseKeys } from '@bedard/utils'
type Test = PascalCaseKeys<{ foo_bar: any }> // { 'foo-bar': any }PascalCaseKeysDeep<T>
Deeply pascal case object keys.
import { PascalCaseKeysDeep } from '@bedard/utils'
type Test = PascalCaseKeysDeep<{ foo_bar: { one_two: any }}> // { FooBar: { OneTwo: any }}PickStartsWith<T, U>
Pick keys of T that start with U.
import { PickStartsWith } from '@bedard/utils'
type Test = PickStartsWith<{ FooOne: void; FooTwo: void ; Bar: void }, 'Foo'> // { FooOne: void; FooTwo: void }PickType<T, U>
Pick keys of T that extend U. This is the inverse of OmitType<T, U>.
import { PickType } from '@bedard/utils'
type Test = PickType<{ foo: string, bar: number }, string> // { foo: string }Pop<T>
Remove the last element of T.
import { Pop } from '@bedard/utils'
type Test = Pop<['foo', 'bar', 'baz']> // ['foo', 'bar']Properties<T>
Create a string union of properties from T. This is the inverse of Methods<T>.
import { Properties } from '@bedard/utils'
type Test = Properties<{ foo: string, bar(): any }> // 'foo'RequiredKeys<T, U>
Get required keys from T, or make keys U of T required.
import { RequiredKeys } from '@bedard/utils'
type Test = RequiredKeys<{ foo: any, bar?: any }> // 'foo'
type Test = RequiredKeys<{ foo?: any, bar?: any }, 'foo'> // { foo: any, bar?: any }RgbColor<T>
Validate a rgb color
import { RgbColor } from '@bedard/utils'
const rgb = <T>(color: RgbColor<T>) => color
rgb('rgb(0, 0, 0)')ScreamingSnakeCase<T>
Convert a string to screaming snake case.
import { ScreamingSnakeCase } from '@bedard/utils'
type Test = ScreamingSnakeCase<'fooBar'> // 'FOO_BAR'ScreamingSnakeCaseKeys<T>
Screaming snake case object keys.
import { ScreamingSnakeCaseKeys } from '@bedard/utils'
type Test = ScreamingSnakeCaseKeys<{ foo_bar: any }> // { FOO_BAR: any }ScreamingSnakeCaseKeysDeep<T>
Deeply screaming snake case object keys.
import { ScreamingSnakeCaseKeysDeep } from '@bedard/utils'
type Test = ScreamingSnakeCaseKeysDeep<{ foo_bar: { one_two: any }}> // { FOO_BAR: { ONE_TWO: any }}Shift<T>
Remove the first element of T.
import { Shift } from '@bedard/utils'
type Test = Shift<['foo', 'bar', 'baz']> // ['bar', 'baz']SnakeCase<T>
Convert a string to snake case.
import { SnakeCase } from '@bedard/utils'
type Test = SnakeCase<'fooBar'> // 'foo_bar'SnakeCaseKeys<T>
Snake case object keys.
import { SnakeCaseKeys } from '@bedard/utils'
type Test = SnakeCaseKeys<{ fooBar: any }> // { foo_bar: any }SnakeCaseKeysDeep<T>
Deeply snake case object keys.
import { SnakeCaseKeysDeep } from '@bedard/utils'
type Test = SnakeCaseKeysDeep<{ fooBar: { oneTwo: any }}> // { foo_bar: { one_two: any }}Split<Source, Delimeter>
Split Source by Delimeter. This type is the opposite of Join. Note that to split by multiple delimeters the second argument must be a string[], as unions will create a distributive conditional type.
import { Split } from '@bedard/utils'
type Test1 = Split<'abc'> // ['a', 'b', 'c']
type Test2 = Split<'a.b.c', '.'> // ['a', 'b', 'c']
type Test3 = Split<'a.b-c', ['.', '-']> // ['a', 'b', 'c']StartsWith<T, U>
Types true if T starts with U.
import { StartsWith } from '@bedard/utils'
type Test = StartsWith<'FooBar', 'Foo'> // trueSymmetricDifference<A, B>
The symmetric difference of A and B.
import { SymmetricDifference } from '@bedard/utils'
type Test1 = SymmetricDifference<'a' | 'b', 'b' | 'c'> // 'a' | 'c'
type Test2 = SymmetricDifference<{ a: any, b: any }, { b: any, c: any }> // { a: any, c: any }ToNumber<T>
Convert numeric string to number
import { ToNumber } from '@bedard/types'
type Test = ToNumber<'123'> // 123Transparent<T>
A type that does not encode any additional data. This is the inverse of Opaque<T>.
import { Transparent } from '@bedard/utils'
type Test = Transparent<string>Trim<T>
Trim leading and trailing whitespace
import { Trim } from '@bedard/utils'
type Test = Trim<' foo bar '> // 'foo bar'UnwrapOpaque<T>
Unwrap the underlying data of an Opaque<T> type.
import { UnwrapOpaque } from '@bedard/utils'
type Test1 = Opaque<string, 'example'>
type Test2 = UnwrapOpaque<Foo> // stringUnwrapJson<T>
Decodes type information from a Json<T> string.
import { Json, UnwrapJson } from '@bedard/utils'
type UserJson = Json<{ email: string }> // string
type User = UnwrapJson<UserJson> // { email: string }ValueOf<T>
Generate a union from the values of T.
import { ValueOf } from '@bedard/utils'
type Test1 = ValueOf<Array<string>> // string
type Test2 = ValueOf<{ foo: number, bar: string }> // number | stringVec<T>
Generate a uniform tuple of length T, with numeric values by default.
import { Vec } from '@bedard/utils'
type Test1 = Vec<3> // [number, number, number]
type Test2 = Vec<3, Thing> // [Thing, Thing, Thing]Without<A, B>
Prohibit properties of A and omit properties of B.
import { Without } from '@bedard/utils'
type Test = Without<{ foo: any, bar: any }, { bar: any }> // { foo?: never }XNOR<T, U>
Logical XNOR gate
import { XNOR } from '@bedard/types'
type Test = XNOR<0, 0> // 1XOR<T, U>
Logical XOR gate
import { XOR } from '@bedard/utils'
type Test = XOR<0, 1> // 1License
Copyright (c) 2021-present, Scott Bedard